To see the other types of publications on this topic, follow the link: Technical characteristics.
Dissertations / Theses on the topic 'Technical characteristics'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Technical characteristics.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Eaton, Sharyn. "The technical and physiological characteristics of the vibromyographic signal." Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/47621/.
Full textAbstract:
Skeletal muscle contractions emit a low frequency sound (<100Hz) that can be detected by vibromyography (VMG) or mechanomyography (MMG). The aim of this study was to determine the future application of the VMG signal as a clinical tool in reflecting the physiological state or function of muscle during rehabilifation and diagnosis. In order to achieve this aim, the following was investigated. A) The technical characteristics: Three different transducers (the capacitance and piezoelectric accelerometers and the contact sensor) and the transducer/ amplifier system. B) The repeatability of the VMG signal at different force levels. C) Physiological characteristics of the VMG signal comparing 'normal' and 'abnormal' muscle function. Past studies on VMG have revealed that these three areas have received little attention. The VMG signal was taken from the biceps brachii muscle at different contraction levels 10%, 50% and 80% maximum voluntary contraction (MVC) for within day (n=3) and between day (n=17) recordings. The signal from asymptomatic (n=29) and symptomatic (n=23) low back pain subjects was then compared. Recordings were taken from the erector spinae muscle at an incremental increase in voluntary contraction (10%-100%MVC). These recordings were repeated on the next day. Results from this study have revealed the following: A) Technical characteristics : the lower cut-off frequency is important and insufficient attention in past studies has been given to the transducer-amplifier system. Additionally, the capacitance accelerometer was the favoured transducer due to its greater sensitivity to low frequencies, simplicity of use and ease of stabilising and coupling techniques to the skin. B) Repeatability of the VMG signal: For successive recordings, compared with precision (%C.O.V and L.O.A) and reliability (I.C.C), correlation (r value) of the VMG signal appears a much stronger and a more consistent statistic in the time and frequency domains. C) Physiological Characteristics: Although having a high individual variation, the erector spinae demonstrated a strong curvilinear relationship with increasing submaximal voluntary contraction (%MVC) reflecting the recruitment and rate coding strategies for this muscle. The VMG RMS for symptomatic low back pain subjects was considerably less than asymptomatic subjects suggesting a deficiency in muscle function. In contrast, the PSD was less favourable in distinguishing between the two subject groups. Reasons for these findings are discussed. In future, the clinical application of the VMG RMS values may quantitatively assess paraspinal muscle force reflecting physiological changes in recruitment and rate coding strategies in 'normal' and 'abnormal' muscle function during rehabilitative care.
2
Davis, Bernard Sydnor III. "A Comparative Study of Leadership Characteristics of Virginia Regional Technical Center Principals." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73813.
Full textAbstract:
The purpose of this study was to identify leadership characteristics of technical school principals as perceived by technical center school principals, the superintendents, and the center's Joint Control Board of the regional technical centers of the Commonwealth of Virginia. A regional technical center principal position deals with a different administrative governing board, students from different high schools, and courses in the field of career and technical education. This study gathered and evaluated perspectives from the participating superintendents, Joint Control School Board members, and regional technical center principals to determine similarities and differences between the perceptions among these groups.
The population selected for this study was comprised of the participating superintendents, school board members, and principals from all ten K-12 public school regional technical centers in the Commonwealth of Virginia during the 2014-15 school year. The results showed that the survey respondents ranked visionary and instructional leader as the top two characteristics for regional technical center principals. The results showed that superintendents and Joint Control School Board members ranked having a background or experience in career and technical education higher than principals ranked that characteristic. Joint Control Board Members ranked having a CTE degree significantly higher than principals and superintendents. Superintendents and Joint Control Board Members rated the principal's ability to articulate an instructional vision as having a significant relation to academic success higher than principals rated that characteristic. Survey respondents rated statement ten; persuasion is the ultimate tool for a technical center principal of public education, mean responses the lowest. All three survey respondents rated statement six; personal and professional integrity, honesty, and fairness are essential leadership characteristics for the public school regional technical center principal, mean responses the highest.
Open-ended question sixteen, what other characteristics that are needed for the CTE leader of a regional technical center that have not been addressed?, revealed results that superintendents and principals indicated that personnel management was a valuable skill, that superintendents believed that building relationships with students and recruiting students along with having the ability to work with various stakeholders was important.Ed. D.
3
Zhyla, M. O. "Comparative characteristics of vehicles technical control undertaking in different countries." Thesis, Sumy State University, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46904.
Full textAbstract:
Relevance of the research of vehicles technical inspection
procedure is determined by constant change and reorganization of the State
Automobile Inspectorate, amendments to the Law of Ukraine "Traffic On",
the Law of Ukraine "On Amendments to Certain Legislative Acts of
Ukraine on elimination of excessive government regulation of road
transport". So, the aim of the mandatory technical inspection is to simplify
the life of citizens, but under discussion is the problem of choice: to use the
present general technical control of vehicles, or to reform it to a harder
form of control.
4
Heikkinen, David. "Physical Testing Characteristics and Technical Event Performance of Junior Alpine Ski Racers." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/HeikkinenD2003.pdf.
Full text
5
Van, Doel Richard M. "Exploring Stewardship Characteristics in Professional, Scientific, and Technical Services Employee-Owned Companies." Thesis, Indiana Wesleyan University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10286641.
Full textAbstract:
This study sought to explore stewardship characteristics within employee-owned companies in the professional, scientific, and technical services industry. For the purpose of this study, stewardship characteristics were defined as the psychological (i.e., intrinsic motivation, organizational identification, use of power) and situational (i.e., collectivism, involvement orientation, and power distance) mechanisms that promote pro-organizational collectivist behaviors within the employee–owners of employee-owned companies organized as Employee Stock Ownership Programs (ESOPs). ESOPs have grown in popularity as a method of transitioning ownership to the firms’ employees since ESOPs were codified by Public Law 93–406 in 1974. There are approximately 7,000 employee-owned firms organized as ESOPs operating in the United States, and these qualified retirement plans cover over 13.5 million participants with total assets exceeding 940 billion dollars. The transition of employees to employee–owners presents a unique governance situation where the employee–owners may simultaneously fulfill the roles of owner, principal, and agent. Stewardship characteristics were measured using a mixed-method approach. The Stewardship Climate Scale quantitatively measured the level of stewardship, and semi-structured interviews helped gain meaning or understanding of stewardship by the ESOP senior leaders.
At an organizational level, the study found a variation in the level of stewardship among the participating ESOPs. However, each ESOP did demonstrate stewardship characteristics, and there was no significant difference in the aggregate of stewardship climate for the ESOPs participating in the study when grouped by revenue per employee. At the individual level, where positional and nonpositional leaders were grouped together, the study found variation between the two groups. However, there was no significant difference in the aggregate of stewardship climate or any of the six constructs of stewardship between the positional and nonpositional leaders. Lastly, the study found a significant relationship between stewardship characteristics and firm productivity. A significant regression equation was calculated for the aggregate of stewardship climate, the psychological mechanisms, and the individual constructs of organizational identification, intrinsic motivation, and involvement orientation. A moderated multiple regression was calculated which identified the relationship between organizational identification and revenue per employee was moderated by the level of involvement orientation.
Based on the quantitative and qualitative data, the ESOPs participating in the study did demonstrate stewardship characteristics with no significant difference within the positional and nonpositional employee–owners. Revenue per employee was significantly influenced by stewardship.
6
Hillman, Elizabeth Elgenora. "The development and technical characteristics of the measure of college students' organizational skills." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1760.
Full textAbstract:
Thesis (Ph. D.) -- University of Maryland, College Park, 2004.Thesis research directed by: Special Education. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
7
Bratton, Edwin L. "Relationships among Missouri Secondary Vocational-Technical electronic programs success, teacher and curriculum characteristics /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9924866.
Full text
8
Green, Benjamin. "Augmenting ICS cyber security risk assessments : assimilation of socio-technical characteristics and constructs." Thesis, Lancaster University, 2018. http://eprints.lancs.ac.uk/126782/.
Full textAbstract:
Industrial Control Systems (ICSs) are applied to the monitoring, control, and automation of operational processes. Example industries include water, electricity, gas, and discrete manufacturing, some of which can be considered critical national infrastructure. Over recent years, an increase in disclosed ICS specific vulnerabilities, and cyber attacks, have been witnessed. The potential direct and cascading impact of these presents a significant risk, with dramatically detrimental consequences from a societal perspective. Complex relationships between essential services, and loss or compromise there of, provide motivation for this thesis. Modern ICSs rely on enterprise to plant floor connectivity. Where the size, diversity, and therefore complexity of an ICS increases, operational requirements, goals, and challenges, defined by users across various sub-systems will ultimately follow. Recent trends in technology convergence may cause system operators to lose a comprehensive understanding of end-to-end requirements. This presents a risk to system security and resilience, where the most minor of changes to sensor signals, can result in operational process degradation and failure. Furthermore, sensors once solely applied for operational process use, now act as inputs supporting a diverse set of organisational requirements. If these are not fully understood, incomplete cyber security risk assessment, and inappropriate implementation of security controls, could occur. This acts as a guiding principle across all thesis chapters, with core objectives set out to better understand and improve current approaches to the assessment of cyber-induced risk. In setting thesis objectives, three prerequisite questions were laid out, leading towards three core research questions, across four phases (Discover, Define, Develop, and Deliver). Initial phases related to ascertaining how ICSs can be understood from a social and technical perspective, who is likely to target ICSs with malicious intent, and how could attacks be conducted from a practical perspective. Applying this as a foundation, based on existing literature and practical experimentation, latter phases were better able to elicit pertinent challenges in current cyber security risk assessment practices, prior to the identification of appropriate mechanisms by which challenges may be addressed. In answering each research question, a mixed approach including literature reviews, practical experimentation, and industry engagement, was applied. Taking this approach has resulted in an output with practical contributions and impact, across both academia and industry alike. This thesis provides contributions across a number of discrete areas, including; a method by which ICSs can be defined from a social and technical perspective; an understanding of relevant threat actors, including tools and techniques which could be applied in the targeting of ICSs; how ICS cyber security risk assessments are currently approached by academia and industry, including a mechanism for their review, and identification of key gaps; approaches to the inclusion of socially derived cyber security risk within an assessment, including the identification of key challenges; and an approach to aid initial phases of ICS cyber security risk assessments. More specifically, how one can obtain a joint socio-technical understanding of system characteristics and constructs, as a prerequisite to cyber security risk assessments. Additional contribution in the form of a comprehensive ICS testbed environment, was developed to support thesis objectives. This facility continues to be of high value in initial stages of future work, more specifically, in the development of tools for use during a cyber security risk assessment, and ongoing risk management/mitigation.
9
Clark, Matthew Edward. "An insight into the profile characteristics and technical batting skill of adolescent cricket players." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/2838.
Full textAbstract:
Background: Current traditional cricket practices incorporate the use of a netted-off pitch to provide cricket players the opportunity to hone their skills with bat and ball. The lack of ecological validity of these training environments results in the absence of important task and environmental constraints which influences the manner in which the sport is played. Objectives: The purpose of the current research was two-fold: firstly, it aimed to establish a profile database of adolescent cricket players in the Eastern Cape province of South Africa; and secondly, it aimed to investigate the efficacy of a constraints-led training intervention on skill development in adolescent cricket batsmen. Methods: Study I required 90 participants (u13: n = 40; u15: n = 50) to perform measures pertaining to anthropometric, morphological, flexibility and physical performance characteristics. This included stature, mass, body composition, limb length, flexibility, agility, and power measures. Study II was a case-control study (u15: n = 24), whereby the experimental group (n = 12) was exposed to a constraints-led batting protocol during the course of the cricket season. The objective of the protocol was to encourage the manipulation of the ball around the playing field. Pre- and post-intervention measures were performed using a batting skills test, which assessed batsmen’s capability to manipulate the ball to various areas of the playing field. Results: Study I revealed significant differences (p <0.0001) in stature, mass, limb length and power variables when comparing the u15 age group with the u13 age group. No differences were recorded for agility. The u13 age group had greater linear correlations for the variables of interest compared to the u15 age group. Study II revealed no differences in technical skill between the experimental group and the control (p <0.315).. The tests also revealed that adolescent batsmen favoured hitting deliveries through the extra-cover scoring zone. The third-man and fine-leg scoring zones were least preferred to hit deliveries through. A number of limitations to the study design resulted in the inability to determine the efficacy of a constraints-led batting protocol on skill development in an adolescent batting cohort. Conclusion: The results of study I indicated that the onset of puberty played an important role in the measures and performances between the u13 and u15 age groups. The results of study II indicated that adolescent batsmen are not adept at manipulating the ball around the field. Recommendations are provided for both studies.
10
Ridder, Dale C. "School and teacher characteristics which influence the teaching of applied academics /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841358.
Full text
11
Booth, Stephanie. "Characteristics of an Optical Communication Link for Mars Utilizing a Modulated Retro-Reflector." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1505407909979898.
Full text
12
Dudley, Eric. "The critical villager : technical aid for rural housing and the characteristics of indigenous technology change." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386924.
Full text
13
Parker, Robin Ann. "The impact of teacher characteristics on a secondary career and technical education program in Mississippi." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-04012008-141904.
Full text
14
Crabtree, Ashleigh R. "Psychometric properties of technology-enhanced item formats: an evaluation of construct validity and technical characteristics." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3064.
Full textAbstract:
The purpose of this research is to provide information about the psychometric properties of technology-enhanced (TE) items and the effects these items have on the content validity of an assessment. Specifically, this research investigated the impact that the inclusion of TE items has on the construct of a mathematics test, the technical properties of these items, and the influence these item types have on test characteristics. An empirical dataset was used to investigate the impact of including TE items on a multiple-choice (MC) assessment. The test used was the Iowa End-of-Course Algebra I (IEOC-A) assessment. The sample included 3850 students from the state of Iowa who took the IEOC-A assessment in the spring of 2012. The base form of the Algebra EOC assessment consisted of 30 MC items. Sixty TE items were developed and aligned to the same blueprint as the MC items. These items were appended in sets of five to the base form, in effect resulting in 12 different test forms. The forms were randomly assigned to students during the spring administration window.
Several methods were used in an attempt to form a more complete understanding of the content characteristics and technical properties of TE items. This research first examined whether adding TE items to an established MC exam had an effect on the construct of the test. The factor analysis confirmed a two-factor model comprising latent factors of MC and TE items, indicating that TE items may add a new dimension to the test. Subsequent to these findings, a more thorough analysis of the item pool was conducted and IRT analyses were done to investigate item information, test information, and relative efficiency. This analysis indicated that there may be a difference in the way students perform on MC and TE items. There is evidence in this particular pool of items that there is a difference in these two item types. This difference may manifest itself as an additional, perhaps unintended, construct on the exam. Additionally, TE items may perform differently depending on the ability level of the student. Specifically, TE items may provide more information, and measure the construct more efficiently than MC items at higher levels of ability. Finally, the quantity of TE items included on a test has the potential to affect the relative efficiency of the instrument, underscoring the importance of selecting items that reinforce the purpose and uses of the test.
15
Thomson, Carole Jean. "Characteristics of technology education that are unique and essential for children's learning in the elementary school curriculum /." free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9998519.
Full text
16
Cox, Nancy Lynne. "Student characteristics and self-concept of secondary career and technical education students in a north central Texas region." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28407/.
Full textAbstract:
Self-concept, discussed as a scholarly topic since the time of Socrates and Plato, is an important theoretical construct in education because self-concept is considered to be a desirable trait and a facilitator of positive future behavior. The purpose of this study was to examine the relationship between the characteristics of students enrolled in career and technical education (CTE) programs and students' self-concept scores as measured by specific subscales from the Self-Description Questionnaire (SDQ). A total of 196 male and 89 female secondary students (Grades 9-12) enrolled in arts, audio/video technology and communications cluster courses in North Central Texas school districts participated in the study. Student characteristic variables of interest were age, gender, CTE program enrollment, and participation in CTE. The self-concept subscales analyzed were General, Academic, Verbal, Math, and Problem Solving. A canonical correlation analysis was conducted using the four student characteristic variables as predictors of the five self-concept variables to evaluate the multivariate shared relationship between the two variable sets. The full model across all functions explained about 23% of the variance between the variable sets. Function 1 explained 15% of the shared variance and Function 2 explained 7% of the variance that remained. This study detected a relationship between specific student characteristics and self-concept as measured on certain domain-specific first-order factors. Gender and participation in CTE were found to be related to verbal self-concept and problem-solving self-concept. Results suggest that females in arts-based CTE programs have a higher verbal self-concept than their male counterparts; male students have a higher problem-solving self-concept. Results further suggest that students with a high level of participation in CTE also have high verbal and problem-solving self-concepts.
17
Кудрицька, В. Ф. "Літаючий автомобіль." Thesis, Сумський державний університет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/43438.
Full textAbstract:
Літаючий автомобіль – гібридний автомобіль; транспортний засіб, який може працювати на дорозі, а також літати по небу. Для літаючого автомобіля дуже важливі і такі якості, як компактність і незалежність від аеродромів.
18
Hallgren, Frej. "Technical performance on ATP top level, future level and Swedish youth national level male tennis tournaments : Notational analysis of point characteristics in three different tournaments on three different performance levels." Thesis, Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-4614.
Full textAbstract:
Aim and research questions To investigate technical performance in three different tennis competitions (ATP Masters AM, Falu Future, FF & Swedish youth national championships, YNC) by collecting data of point characteristics. Are there any differences or similarities between the competitions analyzed concerning type of shots or shot combinations used, from which hitting zone on the tennis court the shots or shot combinations are hit and the placement of the different shots when scoring points? Are there any differences or similarities between the competitions analyzed concerning number of valid shots over the net in a rally? Are there any differences or similarities between the competitions analyzed concerning number of errors (forced and unforced) and winning shots committed in matches? Method The sample consisted of a total of 24 matches with 40 different players from three different tournaments which were analyzed using notational analysis software (Dartfish, version 8, Switzerland). Total number of points analyzed were 3154 (AM, n = 968, FF, n = 1068, YNC, n = 1118). Data were compiled in Excel (2013) and descriptive analyses were performed in IBM SPSS Statistics 24. Statistical analyses looking for overall significant differences between the groups were made using Chi square cross tab test. Due to the number of statistical tests that were performed for each domain in the post hoc test, an adjusted significance level of p < 0.001 was used to reduce the risk of Type 1 error. Results Significant differences were observed between groups for serve placement, shot used after hitting a serve, type of 2nd last and last shot used, hitting zone and placement by the point winner on last shots. Rallies of longer duration were significantly more frequent in the AM & FF groups compared to the YNC group. Concerning serve outcome, serve return, return placement, shot after serve placement, shot combinations, length on 2nd last and last shot, unforced, forced errors and winners no statistical differences were observed between groups. Conclusion This study indicates that higher demands are placed on placement accuracy in the ATP masters and Falu Future tournaments, specifically for the serve, but also for groundstrokes compared to the Swedish youth national championships tournament. This knowledge can be used to identify technical skills and physiological abilities that are important to practise in order to improve performance in tennis on different levels.
19
Simmons, Jamie Munn. "Characteristics of Exemplary Science, Technology, Engineering, and Math (STEM)-Related Experiential Learning Opportunities." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/77527.
Full textAbstract:
Experiential opportunities at the secondary level give students the 'intimate and necessary relation between the processes of actual experience and education' (Dewey, 1938, p. 19-20). Career and Technical Education classes (CTE) and co-curricular experiences, one type of experiential learning, underpin and cultivate student curiosity and often channel interests into STEM-related post-secondary disciplines and career choices. There is little existent research on the characteristics of exemplary experiential learning opportunities and the impact on stakeholders. This study is intended to identify the qualities and characteristics of an exemplary secondary experience through the lived experiences of the stakeholders; students, STEM-related teachers, and CTE/STEM Administrators.
A qualitative research design was used to examine characteristics and implications for students of four STEM-related programs throughout Virginia. Conclusions from the study include fundamental principles for providing exemplary experiential STEM-related learning opportunities. These principles include: providing hands-on, real world learning opportunities for students, providing learning opportunities that will enhance student ownership in their learning, providing unique and comprehensive career exploration opportunities for students, providing a schedule for teachers that will give them time to plan, deliver, and manage exemplary experiential learning opportunities, providing continual teacher and administrator in-service training relative to planning and implementing exemplary experiential learning opportunities, investing appropriate funds for providing exemplary experiential learning opportunities. Establishing and maintaining active partnerships with business/industry and colleges/universities, and maintaining active advisory communities, providing appropriate staff to support the provision of exemplary experiential learning opportunities is needed. The need for adequate funding, improving perception of CTE and STEM programs, and small class sizes was also recommended.Ph. D.
20
Andreou, Panayiota. "Identifying the theoretical components and technical characteristics of a prototype intervention to support and promote self-care for cold and flu symptoms." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/403497/.
Full textAbstract:
The primary aim of this thesis was to present the development of the prototype of a theory-based web intervention aiming to support decision-making of the general adult population on whether to seek professional help or self-care for acute respiratory tract infections. The thesis comprised of a systematic review, two qualitative studies, one survey, and a step-by-step development of the intervention. All the empirical studies aimed to identify the theoretical and technical components that could improve the intervention. The systematic review of 18 trials aimed to identify the effectiveness of health educational materials in improving health outcomes for minor ailments such as physical health and health service use. There was mixed evidence regarding the factors that influence primary care consultations; providing educational information outside consultation appeared to be most effective. The piloting of the intervention elicited feedback, via 21 interviews, regarding the content of the intervention e.g. reducing the length of the information, making screening questions clearer, and clarifying when they need to seek professional help. Comments about the format included improving the navigation and aesthetics of the materials by adding more pictures and colour as well as reducing the use of jargon language. The second qualitative study aimed to elicit the underlying reasons to consult a clinician. Findings indicated that consultation was linked to uncertainty about the symptoms, severity and the impact on everyday activities, and past antibiotic prescribing. The theories closely identifying with the arising constructs were Social Cognitive theory, the Common Sense of Illness Representations, and the Beliefs about Medication. The last study of thesis, a survey of 323 participants, showed that the most significant factors linked to the decision not to seek professional help were strong beliefs that symptoms can resolve on their own and seeking help from the pharmacist prior seeing the GP. The findings from the empirical studies contributed further into the development of the intervention as a new resource to help individuals decide whether to seek professional help or self-care for their symptoms. Further work for the online version of the intervention, including tailoring of theoretical factors and including more representative sample, can enhance its validity and effectiveness.
21
Akpom, Reginald C. "INVESTIGATING THE IMPACT OF ORIENTATION AND DETECTED CHARACTERISTICS OF FIRST-TIME ONLINE STUDENTS ON THEIR SUCCESS RATE IN A COMMUNITY COLLEGE SETTING." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/dissertations/788.
Full textAbstract:
It is evident that the failure rate is higher among online students than in-class students at Hopkinsville Community College. An analysis of the academic records of students who enrolled in online courses for the first time at Hopkinsville indicated a 13% higher withdrawal and failure rate than those who took in-class courses over the same period between 2000 and 2010. Colleges are taking potentially all of the necessary steps to reduce the student failure rates among online students because high withdrawal and failure rates often reflect badly on the quality of education by the providing institutions (C. Segura, personal communication, November 2009). The purpose of this study is to determine if there is any statistically significant difference in the success rates between first-time online students who participated in the orientation for first-time online students, and first-time online students who did not participate in the orientation at Hopkinsville Community College. The study also determined if any relationships exist between success in an online course and student gender, student course load, student grade point average (GPA), student age, student readiness for online learning score, and student level of technology experience score. Studying the relationships between orientation of first-time online students and withdrawal and failure rates among first-time online students may lead to finding ways of reducing the high failure and withdrawal rates of online students at the community college.
22
Novák, Vlastimil. "Statistické charakteristiky obchodních dat finančního trhu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236466.
Full textAbstract:
The object of master's thesis is to introduce to the financial derivatives and principals of trading on financial markets. We describe the methods used to search for arbitrage opportunities through statistical indicators and statistical characteristics, which are an integral part of the automatized trading systems. Analysis of the financial market is based on data derived from the interbank market.
23
Keprdová, Šárka. "Využití rychle obnovitelných surovin ve výplňových hmotách." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-355640.
Full textAbstract:
Construction is a very dynamically developing industry that is placing ever greater demands on the properties of used building materials and structures built on them. In this context, there is a long-term trend to use construction materials made from natural quickly renewable raw materials. These tendencies are caused by natural reaction to the overly technological modern society, as well as efforts towards a greener approach in construction. In this sense, the natural materials from renewable sources means technologically processed organic material of plant origin. Dissertation focuses on the research and subsequent development of filling materials for vertical and horizontal structures based on quickly renewable materials. Pivotal quickly renewable raw material used in the production of filling material is technical hemp. Technical hemp is quickly renewable raw material with very good properties very similar to wood. Furthermore, the research focused on secondary raw materials, which partly replace the binder of the filling material. The resulting filling material has good physical-mechanical and thermo-technical characteristics.
24
Niehaus, Harold. "Association Between Identified Perkins IV Performance Data and Selected Characteristics of Ohio Joint Vocational School Districts." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1366731958.
Full text
25
Croft, Vaughn E. "A national study to determine the characteristics of technological literacy for high school graduates." Diss., Virginia Tech, 1989. http://hdl.handle.net/10919/37295.
Full text
26
Park, Deric M., Jinkyu Jung, Jimmy Masjkur, Stylianos Makrogkikas, Doreen Ebermann, Sarama Saha, Roberta Rogliano, et al. "Hes3 regulates cell number in cultures from glioblastoma multiforme with stem cell characteristics." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-127014.
Full textAbstract:
Tumors exhibit complex organization and contain a variety of cell populations. The realization that the regenerative properties of a tumor may be largely confined to a cell subpopulation (cancer stem cell) is driving a new era of anti-cancer research. Cancer stem cells from Glioblastoma Multiforme tumors express markers that are also expressed in non-cancerous neural stem cells, including nestin and Sox2. We previously showed that the transcription factor Hes3 is a marker of neural stem cells, and that its expression is inhibited by JAK activity. Here we show that Hes3 is also expressed in cultures from glioblastoma multiforme which express neural stem cell markers, can differentiate into neurons and glia, and can recapitulate the tumor of origin when transplanted into immunocompromised mice. Similar to observations in neural stem cells, JAK inhibits Hes3 expression. Hes3 RNA interference reduces the number of cultured glioblastoma cells suggesting a novel therapeutic strategy.
27
Soják, Zbyněk. "Certifikační postupy pro experimentální letouny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228076.
Full textAbstract:
Work includes certification procedures for experimental aeroplanes. Producer must answer individual work for right procedure certification. Office UCL give works and control production procedure aeroplane. Stationery (applications, confirmation, tec.) are part of work and is need make and feed. Part of work is VUT 001 MARABU and technical characteristics aeroplane.
28
Vann, Rose Virginia. "A study of the relationship between the preference of conflict management styles, demographics, and selected characteristics of vice presidents of technical institutes in the state of Georgia." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 1993. http://digitalcommons.auctr.edu/dissertations/1472.
Full textAbstract:
The purpose of this study was to determine the relationship between the preference of conflict management styles, demographics, and selected characteristics of Vice Presidents of Technical Institutes in the State of Georgia using a correlational research design. Statistical analysis based on the responses from eighty-seven (87) Vice Presidents, found no significant relationship between the preference of conflict management styles, demographics, and selected variables. However, a significant relationship was found between leadership style and conflict management styles at the .01 level. A significant relationship was found with leadership style and age at the .05 level. These findings have significant implications for further situational leadership development for these leaders.
29
Adeyeye, Oshin Oluyomi. "Identifying female mobile bully-victim characteristics in selected high schools in South Africa: towards an anti-bullying mobile application." Doctoral thesis, Faculty of Commerce, 2020. http://hdl.handle.net/11427/32435.
Full textAbstract:
Within the majority of learners' years in high school, bullying is one common experience that pervades those years of transitioning to adulthood. The bullying phenomenon has been studied over a few decades and we have basically come to understand that bullying is any situation where a perpetrator, over a period, continually behaves aggressively towards another individual who cannot defend themselves; here an imbalance of power is accentuated. This has been studied in recent years with the increasing reports of fatalities among high school learners who have resorted to suicide and self-harm as a solution. In the current digital age, the extent of bullying is faster and reaches further, and as such, more dynamics seem to be involved in the mix. The role of technology in improving the way we live and do things has also extended to the way crimes and injustice are being meted out in society. Youths and adolescents, particularly high school learners have been noted to have a phenomenal adoption of technology. They are also noted to increasingly acquire the most updated mobile technology devices and are therefore a fit sample for examining mobile bullying. In addition, more studies are finding out distinct classifications such as bully, victim and bully-victims, with the bully-victim studies just beginning to gain attention. As with the more familiar traditional bullying, fundamental psychological, social and economic factors largely predict the exhibiting of bully-victim characteristics. Some studies have found that the consequences are, however, more severe within the group but not without some inconsistencies in findings; hence the need to investigate and begin to proffer the right interventions or solutions. This current study set out to investigate characteristics of female mobile bully-victim behaviours amidst claims that they are a minority and so no special attention need be given to them. A pilot study, conducted by this researcher, examining the bully-victim subgroup from previous cyberbullying research studies (Kabiawu & Kyobe, 2016), found the group exists and is fast gaining more popularity in research. Further examination of literature found the discourse around age factor in prevalence, with gender variances, interventions, and country differences, among others. Many of the past studies on gender variance enquiries were conflicting, interventions were largely not technology-oriented, and studies were mostly from outside the continent of Africa. This stirred up the interest in studying female mobile bully-victims in South African high school students and the exploration of a general (i.e. non-gender-specific) technical intervention. The study followed a pragmatic philosophy and mixed method in collecting and analyzing the data. The study was carried out in Cape Town, South Africa; eight schools agreed to participate in the survey, and 2632 responses were collected from a range of schools (consisting both public and independent schools). Of these, 911 were females and 199 bully-victims, placing the group in a minority position. This maintained the keen interest in understanding the issues that face them rather than overlooking the subgroup as some studies would argue. Additionally, the study vii entailed the development of an IT artefact in the form of a mobile application, called “The BullsEye!” through a Design Science process. The aim of the artefact was to proffer a technical intervention and observe the usefulness of the artefact in dealing with general bullying as well as for addressing, mitigating and providing support for bullying. The study collected information quantitatively to explore the differences in age, school grade, type of school, family type, ethnicity and perceptions of interventions from students. This process was also used to recruit interested students in designing the mobile app intervention to address the secondary aspect of the research. The study predicted that at different ages and school grades, female mobile bullyvictim behaviours would be different. It also proposed that these behaviours exhibited by bully-victims would differ when the school type, ethnicity and family from which students come, are compared. When interventions by teachers, family and friends were compared, the study predicted that the female bully-victim behaviours exhibited would not be same, depending on the perception of the level of intervention the students received. These hypotheses were tested empirically using quantitative methods to check the analysis of the variance of the mean scores of the collected data. The results of the analysis of variance showed findings that resulted in some partial and some strong acceptance of the hypotheses. As expected, there were age and grade differences observed among the behaviours of the female bully-victims surveyed. The younger in age and grade these students were, the more of the behaviours were found to be exhibited by them. Students from conventional families with two parents were expected to exhibit fewer female bully-victim characteristics, but this was not necessarily the finding in the study and inconsistent with most previous studies. The prediction on ethnicity was also partially accepted due to mixed indications according to findings. Establishing the respondents' ethnicity showed a group of students who did not wish to reveal their ethnicity but were rife in bully-victim behaviour via phone calls, email and SMS's. This raised a question of whether their societal status affected their behaviour. The type of school was also found not to accurately predict female bully-victim behaviours in this study as expected or in accordance to majority of existing literature. There was, however, evidence of a distinct social media mechanism of bullying/victimization peculiar to an Independent school in relation to other schools. The prediction on interventions, while being partially supported, provided a useful insight into strengthening the need to appreciate and continually invest in the quality of interventions provided to address mobile bullying. Generally, the findings revealed that female mobile bully victims had significantly higher experience of being victims (i.e. had been bullied) than those who were not. This may be due to failings in the provision for reporting issues or the way reports are being handled, which is another useful insight into interventions. The artefact designed as an intervention in this study also showed high acceptance of the app. This can be attributed to the fact that the design process followed a methodology that is grounded in practice and in the body of knowledge. This was embellished by emerging methodologies of involving the intended users, though schoolchildren, in the evolution of the artefact design. The implication of these findings is that there may be current frameworks addressing female mobile bully-victim behaviour at school and family levels; however, focus of interventions should be on teaching the right culture with regards to mobile phone use. This gives credence to the second objective of this study, which was to design a digital intervention. The artefact was designed to empower victims and bystanders, the purpose of which seemed to have been achieved with a high rate of approval for the app. The knowledge gained from this phase, despite the limitations, points that visual appeal is important when designing for high school students. It also showed that students are interested in learning in an environment free of adult presence or supervision. However, many more strategies and principles can be applied to intervene from different perspectives to create a more wholistic solution. This knowledge is useful for future works that seek to include their input in design process. The understanding of these characteristic mechanisms is important in proffering relevant interventions as the distinct female bully-victim group is newly gaining attention. This is useful in theory development, especially feminist theories on violence as well as where and how to target interventions. This impacts practice in terms of knowledge of how female mobile bully-victims operate and how one can begin to empower them to protect themselves and reflect on their online and mobile phone behaviour. Therefore, for Information Systems practice, this study provides a worthwhile contribution, especially in answering questions such as, what information systems and interventions should be developed and how to maximize such systems for their intended learning purposes. From the lessons learned in this study, the research also contributes by proposing considerations for future and further research.
30
Louw-Harmse, Yo-Ann Sonja. "Gender imbalance: a focus on senior management positions in the it sector in South Africa." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/1403.
Full textAbstract:
Thesis submitted in fulfilment of the requirements for the degree Master of Technology (Discipline: Information Technology) in the Faculty of Informatics and Design at the Cape Peninsula University of TechnologyWomen in South Africa are under-represented in senior management positions in the Information technology (IT) sector — even with available incentives and directives to rectify the situation. The purpose of this research is to explore and understand the reasons for the imbalance in representation of women in senior management positions in the IT sector in South Africa. Seventeen women in middle to senior management positions from two of South Africa’s nine provinces — Western Cape and Gauteng — were interviewed for this study. The women were asked to relate their personal experiences and perceptions around organizational culture in IT environments and factors influencing their career advancements. A qualitative content analysis method was used to analyse the responses from the interviews. The findings of this study confirm the imbalanced representation of women in senior management positions. It was found that organizations are open and welcoming and provide opportunities to women, but women in the IT sector do not necessarily desire to advance to senior management positions. Factors such as the legacy in the IT industry where men held senior positions, career interruptions due to child bearing, and the absence of female mentor’s impact on the career advancement of women. The informal recruitment process for senior manager positions and the lack of emphasis on the need for women in IT when advertising senior management positions worsen the situation. Women lack self-confidence and are of the opinion that their skills set must be an exact match to the job requirements before applying for senior positions. Work life balance is not supported in the IT environment and no development programs aimed specifically at women are available. The paucity of women taking up technical careers — such as IT — limits the number of women available to develop and appoint in senior management positions. Guidelines for women to advance to senior positions and for companies to recruit and hire women are proposed. These guidelines will assist to correct the imbalance representation of women in senior management positions and promote IT as a career for women. A suggestion for future studies is to compare career advancement of women working in the software development environments, compared to women in the infrastructure and technical environments of IT, as well as those who have left the IT industry.
31
Cakir, Murat. "Information System Effectiveness Assessment Framework For The Turkish Army." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605338/index.pdf.
Full textAbstract:
The primary purpose of this study is to develop a methodology that can be used to assess IS effectiveness in the Turkish Army. This study starts with the review of the information system effectiveness and assessment paradigms. Afterwards, influences of the characteristics of the Turkish Army on IS effectiveness assessment techniques are investigated. Observations and interviews are determined as the favorable data collection techniques. A user perceived effectiveness assessment instrument for semi-structured interviews is developed. Then a case study is applied to assess IS effectiveness in one of the units of the Turkish Army. At the end of the thesis, a qualitative assessment methodology based on maturity and key determinants of a successful IS are proposed for the Turkish Army.
32
Výskala, Miloslav. "Modelování a simulace projektů zlepšujících tepelně-technické vlastnosti budov." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-234556.
Full textAbstract:
This doctoral thesis deals with the modelling of projects improving the thermal technical characteristics of buildings. The solution of this problem seems to be finding at least one cost-effective option. The basic method of evaluation of cost-effectiveness is represented by the compilation of all corresponding cash flows and their rendering in time through discounting. The aim of the docáral thesis is the processing and modeling of individual investment options related with improve the thermal-technical properties of buildings and finding a cost-optimal variants, ideally. One of the expected outputs is to develop a comprehensive methodology (modeling and simulation task) useful for defining all potential investment projects improving variant thermal-technical properties of the object.
33
Todorof, Maria Borisof. "Viability of Derivatives in Radical Islam. A Comparative Assessment of the Technical and Shariah-Compliant Characteristics of the Main Islamic Financial Instruments: Contracts & Defaults in the Prospect of Revivalism." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/668696.
Full textAbstract:
This work examines the prospective viability of derivatives and financial contracts more generally under a strict application of Shariah law. The author adopts a cross-disciplinary approach in order to convey the idea that some of the most popular contracts and arrangements in Islamic finance law are deficient from a structural and Shariah-compliance perspective. The thesis argues that the investor protection issues arising from this conclusion are sufficiently serious to undermine the viability of these instruments not only in a radical but also in a more conservative environment.
This conclusion is arrived at after an in-depth analysis of the fundamental Shariah principles, relevant to finance, placing them in a historical, jurisprudential and political context. The work endeavours to guide the reader through the many turns of Islamic law, breaking down established concepts and questioning their application in modern Islamic law.
For example, the author unpacks the notion of wa‘d (promise), arguing that its extensive use in Islamic contracts renders much of the resulting complex transactions deficient from a structural perspective.
Furthermore, this work highlights technical and Shariah-related weaknesses in essential contract forms, with a particular focus on murabaha.
Importantly, the author approaches the research question from the viewpoint of contracts – comparing constructs of Islamic Contract Law to those of its Common Law counterpart, without ignoring relevant influences and inspirations coming from the civil law tradition. The purpose of this comparison is to establish that some of the most popular financial arrangements, such as sukuk, are deficient in their investor protection provisions. What is more, the author underlines that due to the hybrid characteristics of the sukuk instrument and the lack of tailor-made regulation, investors are inadequately provisioned for the event of issuer‘s default.
Starting with the idea that the sukuk instrument is structured on the basis of and resembles a number of conventional instruments, the thesis examines the possibility for a sukuk investor to obtain redress under US and UK law, as well as the comparable provisions in Malaysia and France.
Alongside this, the author delves into the beginnings, inspirations, main strands and important political leaders of Islamic Revivalism. The aim of this inquiry is to arrive to a convincing explanation about the political and economic developments in established and aspired to Islamic States. To this end, this work offers a case study of Iran and ISIS, including an analysis of the Iranian Islamic finance system and a hypothesis about the possible approach of a jihadi-salafist government to the financial framework of their aspired to State.
As a last point, the work considers how FinTech fits within the objectives of Shariah law and more specifically, its risk-management and social justice strategies.
The thesis offers conclusions which draw on the extensive research and map out a possible view of the future of financial instruments in a radical Islamic environment.Aquest treball examina la viabilitat potencial de derivats i contractes financers més generalment sota una estricta aplicació de la llei de Sharia. L‘autor adopta un enfocament interdisciplinari per tal de transmetre la idea que alguns dels contractes i arranjaments més populars en la legislació financera islàmica són deficients des d‘una perspectiva estructural i de compliment de la xaria. La tesi argumenta que els problemes de protecció dels inversors derivats d‘aquesta conclusió són prou greus per minar la viabilitat d‘aquests instruments no només en un entorn radical, sinó també en un entorn més conservador. Aquesta conclusió s‘arriba després d‘una anàlisi en profunditat dels principis fonamentals de la Sharia, rellevants per al finançament, situant-los en un context històric, jurisprudencial i polític. L‘obra s‘esforça a guiar el lector per les múltiples voltes del dret islàmic, desglossant conceptes establerts i posant en dubte la seva aplicació en el dret islàmic modern. Per exemple, l‘autor desaconsella la noció de wa‘d (promesa), argumentant que el seu ús extensiu en contractes islàmics fa que gran part de les transaccions complexes resultants siguin deficients des d‘una perspectiva estructural. A més, aquest treball posa de manifest les debilitats tècniques i relacionades amb la Sharia en les formes de contracte essencials, amb una particular atenció a la murabaha. És important destacar que l‘autor aborda la qüestió de la investigació des del punt de vista dels contractes: comparant construccions de la llei de contractes islàmica amb les de la seva contrapartida de dret comú, sense obviar les influències i inspiracions rellevants que provenen de la tradició del dret civil. L‘objectiu d‘aquesta comparació és establir que algunes de les disposicions financeres més populars, com sukuk, són deficitàries en les seves disposicions de protecció dels inversors. A més, l‘autor subratlla que, a causa de les característiques híbrides de l‘instrument sukuk i la manca de regulació a mida, els inversors no es disposen de manera adequada en cas d‘impagament de l‘emissor. A partir de la idea que l'instrument sukuk està estructurat a partir i s'assembla a diversos instruments convencionals, la tesi examina la possibilitat que un inversor sukuk obtingui redreçament segons la legislació nord-americana i del Regne Unit, així com les disposicions comparables a Malàisia i França. . Paral·lelament, l‘autor aprofundeix en els inicis, les inspiracions, les principals línies i importants líders polítics del revivalisme islàmic. L‘objectiu d‘aquesta investigació és arribar a una explicació convincent sobre els desenvolupaments polítics i econòmics dels Estats islàmics establerts i aspirants. Amb aquesta finalitat, aquest treball ofereix un estudi de cas d‘Iran i ISIS, incloent-hi una anàlisi del sistema financer islàmic iranià i una hipòtesi sobre el possible enfocament d‘un govern jihadi-salafista al marc financer dels seus aspirants a l‘Estat. Com a últim punt, el treball planteja com FinTech s‘encaixa dins dels objectius de la llei de Sharia i, més concretament, de les seves estratègies de gestió de riscos i de justícia social. La tesi ofereix conclusions que s‘extreuen en les àmplies investigacions i mostren una possible visió del futur dels instruments financers en un entorn islàmic radical.
Este trabajo examina la viabilidad prospectiva de derivados y contratos financieros de manera más general bajo una estricta aplicación de la ley Shariah. El autor adopta un enfoque interdisciplinario para transmitir la idea de que algunos de los contratos y arreglos más populares en la ley de finanzas islámica son deficientes desde una perspectiva estructural y de cumplimiento de la Shariah. La tesis argumenta que los problemas de protección de los inversores derivados de esta conclusión son lo suficientemente graves como para socavar la viabilidad de estos instrumentos no solo en un entorno radical sino también en un entorno más conservador. Se llega a esta conclusión después de un análisis en profundidad de los principios fundamentales de la Shariah, relevantes para las finanzas, colocándolos en un contexto histórico, jurisprudencial y político. El trabajo intenta guiar al lector a través de los muchos giros de la ley islámica, desglosando los conceptos establecidos y cuestionando su aplicación en la ley islámica moderna. Por ejemplo, el autor desempaqueta la noción de wa‘d (promesa), argumentando que su uso extensivo en los contratos islámicos hace que muchas de las transacciones complejas resultantes sean deficientes desde una perspectiva estructural. Además, este trabajo resalta las debilidades técnicas y relacionadas con la Shariah en las formas de contrato esenciales, con un enfoque particular en murabaha. Es importante destacar que el autor aborda la cuestión de la investigación desde el punto de vista de los contratos, comparando las construcciones del derecho contractual islámico con las de su contraparte del derecho consuetudinario, sin ignorar las influencias e inspiraciones relevantes que provienen de la tradición del derecho civil. El propósito de esta comparación es establecer que algunos de los arreglos financieros más populares, como el sukuk, son deficientes en sus disposiciones de protección al inversionista. Además, el autor subraya que debido a las características híbridas del instrumento sukuk y la falta de una regulación a medida, los inversores no cuentan con una provisión adecuada para el caso de incumplimiento del emisor. Comenzando con la idea de que el instrumento sukuk está estructurado en base a una serie de instrumentos convencionales y se asemeja a él, la tesis examina la posibilidad de que un inversor sukuk obtenga una reparación bajo las leyes de EE. UU. Y el Reino Unido, así como las disposiciones comparables en Malasia y Francia . Junto a esto, el autor profundiza en los comienzos, inspiraciones, líneas principales e importantes líderes políticos del revivalismo islámico. El objetivo de esta investigación es llegar a una explicación convincente sobre los desarrollos políticos y económicos en los Estados islámicos establecidos y aspirantes. Con este fin, este trabajo ofrece un estudio de caso de Irán e ISIS, que incluye un análisis del sistema financiero islámico iraní y una hipótesis sobre el posible enfoque de un gobierno yihadista- salafista al marco financiero de sus aspirantes al Estado. Como último punto, el trabajo considera cómo FinTech se ajusta a los objetivos de la ley islámica y, más específicamente, a sus estrategias de gestión de riesgos y justicia social. La tesis ofrece conclusiones que se basan en la extensa investigación y trazan una posible visión del futuro de los instrumentos financieros en un entorno islámico radical.
34
Hartman, Astrid. "Balancing an Increasing Share of Intermittent Wind Power Production : A comparison between the characteristics of wind power variations in Sweden and the technical flexibility of a major district heating utility." Thesis, KTH, Energiteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192554.
Full textAbstract:
Environmental changes caused by human activities are frequently discussed issues andrenewable energy is given increased technological and political attention. The Swedish politicaltarget of a growth of renewable energy has boosted investment in weather dependent wind powerproduction. As a larger share of the energy supply becomes intermittent, the energy system faceschallenges in balancing the grid and maintaining a secure energy supply. Thus, new requirementson regulating capacity will be necessary to drive this transformation. AB Fortum Värme samägtmed Stockholms Stad (Fortum Heat), a district heating company operating in the Stockholmregion, has the potential to adapt its electricity production to market variations. The flexibilityoriginates from a large variation of technologies and fuels used, and the company is both aconsumer and producer of electricity. However, the electrical flexibility is limited by rampingtimes and the heating demand of the market, and inaccurate forecasts complicate the planningprocess. In this report, the historical hourly variations of wind power production from 2011-2015 inSweden were investigated and compared with the technical flexibility of Fortum Heat. Thevariations were found to be in line with the current ramping times of the company’s power plantsbut would in some cases require the plants to be in stand by mode, posing higher economic risksfor the company. The seasonal variations in Fortum Heat’s flexibility were also found tocoincide with the changes of wind power production, with some exceptions. During extremelylow temperatures, Fortum Heat produces heat alone due to liabilities towards the district heatingcustomers. Consequently, as wind power production was lower during these temperatures,Fortum Heat has to decrease its dependency on heat only production in order to enable electricityproduction. Furthermore, wind power production was smaller during higher temperatures, whenFortum Heat’s flexibility is low. Condensing power could be operated during these temperatures,but require that maintenance would have to be planned accordingly.Miljöförändringar orsakade av mänskliga aktiviteter är ett ofta diskuterat problem och förnybarenergi ges allt större teknisk och politisk uppmärksamhet. Det svenska politiska målet om enökning i förnybar energi har gett ett uppsving för investeringar i väderberoendevindkraftsproduktion. Då en större del av energiutbudet blir intermittent uppkommer svårigheteri att balansera elnätet och att upprätthålla ett säkert energiutbud. Därför kommer nya krav påreglerkapacitet att vara nödvändiga för att driva på denna transformation. AB Fortum Värmesamägt med Stockholms Stad, ett fjärrvärmeföretag med verksamhet i Stockholmsregionen, harpotentialen att anpassa sin elektricitetsproduktion till marknadsvariationer. Flexibilitetenkommer från stora variationer i teknik och bränsle, och företaget är både konsument ochproducent av elektricitet. Den elektriska flexibiliteten är dock begränsad av rampingtider samtmarknadens värmebehov och felaktiga prognoser kan försvåra planeringsprocessen. I denna rapport undersöks de historiska, timvisa variationerna i vindkraftsproduktion mellan2011-2015 i Sverige och jämförs med den tekniska flexibiliteten hos Fortum Värme. Enligtuträkningarna visade sig variationerna vara i linje med de nuvarande rampingtiderna hosföretagets anläggningar, men kunde i några fall kräva att verken opererar i stand by vilket i sintur utgör en högre risk för företaget. Säsongsvariationerna för Fortum Värmes flexibilitetsammanföll enligt beräkningarna med förändringarna i vindkraftsproduktion, med vissaundantag. Under extremt låga temperaturer producerade företaget endast värme på grund avskyldigheter mot sina fjärrvärmekunder. Eftersom vindkraftsproduktionen minskar under lågatemperaturer måste därmed Fortum Värme minska sitt beroende av endast värmeproduktion föratt möjliggöra elproduktion. Vindkraftsproduktion var dessutom mindre under högretemperaturer, när Fortum Värmes flexibilitet är låg. Kondenskraft kan i dessa fall vara ettalternativ men kräver att underhåll planeras i enlighet med elbehovet.
35
Viana, Rafael Gomes. "Avaliação de pontas de pulverização sob diferentes condições operacionais." Universidade Federal de Viçosa, 2006. http://locus.ufv.br/handle/123456789/4551.
Full textAbstract:
Made available in DSpace on 2015-03-26T13:39:43Z (GMT). No. of bitstreams: 1
texto completo.pdf: 440959 bytes, checksum: d22f486cf5e4f4bfebe84fc49fb6dd16 (MD5)
Previous issue date: 2006-09-18Conselho Nacional de Desenvolvimento Científico e Tecnológico
This work had the objective to evaluate different spray nozzle by different operational conditions in order to have subsidies for the correct selection of spray nozzle for pesticide application. The work consisted of two experiments. On the first, it was evaluated the deposition of drops on the soybean canopy by spray nozzle XR11002 (XR), TXA8002 (TX), TT11002 (TT) and TJ60-8002 (TJ) exposed to pressure of 827, 552 and 276 kPa. It was quantified the volume median diameter (DMV) of the drop population, density of drops (drops cm-2) and covering percentage. The drops were collected in three positions on the soybean canopy: superior third, medium and inferior of the plant by factorial scheme 4x3x3 (four spray nozzle, three pressure and three positions on the soybean canopy) in a totally occasional sketch with four repetitions. On the second experiment, the technical characteristics of spray nozzle LA-1JC and SR-1 were evaluated by different operational conditions. It was evaluated the pattern check of spray nozzle in test workbench following the pattern ISO 5682/2 on heights of 30, 40 and 50 cm, determining spray nozzle outflow, drops spectrum, left, right and total angle spray. All characteristics analyzed were submitted to pressure of 100, 200 and 300 KPa. In the experiment about the deposition of drops on the soybean canopy, it was realized that the drop population showed higher DMV on the superior third of the plant. However, the nozzle TJ provided drops with homogeneous DMV in the evaluated positions. Independent of spray nozzle utilized, the pressure of 276 KPa allowed deposition of drops with same size on the three positions. For the other pressures, it was obtained higher pressure on the superior third of the plant. The TJ nozzle provided similar covering of the aim on the three third and superior covering on the other nozzle of the medium third and inferior of the plant. The nozzles promoted higher density of drops on the superior third of the plant, decreasing in proportion to reduce the height, except TJ nozzle which showed homogeneous density in the three positions. Analyzing technical characteristics of SR-1 and LA-1JC nozzles, it was observed continuous pattern check to the LAI-JC nozzles in all pressure and SR-1 when utilized pressure of 100kPa that was indicated for stripe. SR nozzle showed discontinued pattern in the pressure of 200 and 300 kPa, which is indicated for application in total area. There was better uniformity in the distribution (lower rate of variation), with lower set at intervals on the nozzles and higher bar height. For both nozzles DMV decreased in proportion to the increase of the pressure. Independent of the work pressure utilized, LA-1JC and SR-1 nozzles provided extremely dense drops. CH is adequate to the patterns of jet plane nozzle (lower than 5) showing great homogeneity in the drops spectrum in every work pressure. LA-1JC nozzle showed higher outflow than SR1, on the pressure of 200 and 300 kPa, having no difference observed when 100 kPa pressure was utilized. The left and right angle of pulverization were symmetrical that there weren t differences between nozzle and pressure. There was increasing on the angle in proportion to the pressure improvement on the nozzle. It is indicated TJ nozzle for pesticides application in adequate climate conditions.
Objetivou-se, neste trabalho, avaliar diferentes pontas de pulverização em diferentes condições operacionais, visando fornecer subsídios para a seleção correta de pontas de pulverização para aplicação de agrotóxicos. O trabalho constou de dois experimentos. No primeiro foi avaliado a deposição de gotas no dossel da soja pelas pontas de pulverização XR11002 (XR), TXA-8002 (TX), TT11002 (TT) e TJ60-8002 (TJ), submetidas a pressões de 827, 552 e 276 kPa. Quantificou-se o diâmetro da mediana volumétrica (DMV) da população de gotas, densidade de gotas (gotas cm-2) e porcentagem de cobertura. A coleta das gotas foi realizada em três posições no dossel da soja: terço superior, médio e inferior da planta em esquema fatorial 4x3x3 (quatro pontas de pulverização, três pressões e três posições no dossel da planta) em um DBC com quatro repetições. No segundo experimento avaliou-se as características técnicas das pontas de pulverização LA-1JC e SR-1 sob diferentes condições operacionais. Avaliou-se o perfil de distribuição das pontas em bancada de ensaios padronizada seguindo a norma ISO 5682/2 em alturas de 30, 40 e 50 cm, determinou-se a vazão das pontas, o espectro de gotas, o ângulo de pulverização esquerdo, direito e total. Todas as características avaliadas foram submetidas as pressões de 100, 200 e 300 kPa. Observou-se no experimento de deposição de calda no dossel da soja, que a população de gotas apresentou maior DMV no terço superior da planta, entretanto a ponta TJ proporcionou gotas com DMV homogêneo nas posições avaliadas. Independente da ponta de pulverização utilizada, a pressão de 276 kPa permitiu deposição de gotas com tamanho uniforme nas três posições. Para as demais pressões, maior DMV foi obtido no terço superior da planta. A ponta TJ, proporcionou cobertura do alvo semelhante nos três terços e cobertura superior as demais pontas no terço médio e inferior da planta. As pontas promoveram maior densidade de gotas no terço superior da planta, decrescendo à medida que se reduz a altura, exceto para ponta TJ, que apresentou densidade de gotas homogênea nas três posições. Avaliando as características técnicas das pontas SR-1e LA-1JC, observou-se perfil de distribuição contínuo para as pontas LA1-JC em todas as pressões e da SR-1 quando utilizado a pressão de 100 kPa, sendo indicado para aplicação em faixa. A ponta SR-1 nas pressões de 200 e 300 kPa apresentou perfil descontínuo, sendo indicado para aplicação em área total. Houve melhor uniformidade de distribuição (menor coeficiente de variação), com menor espaçamento entre pontas e maior altura de barra. Para ambas as pontas, à medida que se aumentou a pressão diminuiu-se o DMV. Independente da pressão de trabalho utilizada, as pontas LA-1JC e SR-1 proporcionaram gotas extremamente grossas. O CH está adequado aos padrões para pontas de jato plano (menor que 5), apresentando boa homogeneidade no espectro de gotas em todas as pressões de trabalho. A ponta LA-1JC apresentou maior vazão em relação a ponta SR-1, nas pressões de 200 e 300 kPa, não sendo verificada diferença quando utilizada a pressão de 100 kPa. O ângulo de pulverização esquerdo e direito foram simétricos não havendo diferenças entre pontas e pressão. Houve aumento no ângulo a medida que se aumentou a pressão para ambas as pontas.
36
Květoň, Petr. "Technicko-provozní faktory ovlivňující výkony letišť v civilním letectví." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-449714.
Full textAbstract:
The diploma thesis deals with factors that directly or indirectly affect the operation of the airport. The thesis contains theoretical notes of influencing factors, a list of aircraft and their characteristics, including mutual comparison in graphs. The next part focuses on the airport itself, where it tries to identify the factors that affect its operation, including historical events. The next part focuses on the selection of airports in Central Europe, determining the appropriate performance characteristics, which are then compared and evaluated.
37
Aigel, Petr. "Ekonomické charakteristiky životního cyklu stavebního díla." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-392285.
Full textAbstract:
Economic characteristics of building in the life cycle of the building work is a very broad topic. Captures economic part and associated technical part idem. Also, the life cycle of building work is very broad, a great many aspects and bearings enters into and influences the work. Excepting costs and prices of acquisition and maintenance of the works is necessary to observe quality of work performing. Both the materials used part and in terms of quality of each facture. This affects the amount of costs that may arise on the part of such unnecessary and degrading work as an entirety. This work attempts to describe all these aspects and influences, classify and appropriately use to monitoring of the works. All findings are tested on the building work - family house. The cornerstone is to find a suitable way of sorting accompanying work throughout its life cycle, allowing us to track costs and prices incurred on it. The conclusion consists answering questions and hypothesis exposed in the work.
38
Stonkus, Audrius. "Kombinuotų mechaninio nuotekų valymo įrenginių privalumų ir trūkumų analizė." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120530_125217-38799.
Full textAbstract:
Tyrimo objektas: kombinuoti mechaninio nuotekų valymo įrenginiai esantys Balbieriškio, Kaišiadorių, Pasvalio ir Kuršėnų nuotekų valyklose.
Tyrimo tikslas: išanalizuoti kombinuotų mechaninio nuotekų valymo įrenginių taikymo galimybes, atsižvelgiant į nuotekų charakteristikas, atlikti šių įrenginių privalumų ir trūkumų analizę.
Tyrimo uždaviniai:
1. Identifikuoti nuotekų valyklose esamus kombinuotus nuotekų valymo įrenginius.
2. Atrinkti nuotekų valyklas su skirtingais kombinuotais nuotekų valymo įrenginiais.
3. Išanalizuoti pasirinktose nuotekų valyklose atitekančių nuotekų charakteristikas.
4. Atlikti atrinktuose objektuose kombinuotų valymo įrenginių privalumų ir trūkumų analizę.
Tyrimo metodas: ekspertinis vertinimas (vizualus vertinimas).
Tyrimo rezultatai:
Trumpai aprašomi atrinkti objektai, kuriuose sumontuoti skirtingi kombinuoti mechaninio nuotekų valymo įrenginiai. Aprašomos kombainų techninės charakteristikos ir jų veikimas.
Atliekamas kombainų vertinimas pagal vertinimo kriterijus: įrenginių techninis patikimumas, valymo procesų technologinis stabilumas, valymo įrenginių kontrolės ir eksploatavimo ypatumai, valymo įrenginių priežiūros ir einamojo remonto ypatumai.
Gauti kombainų vertinimo rezultatai pagal 4 kriterijus panaudojami daugiakriterinei analizei, kuriai atlikti naudojama kompiuterinė programa DAM.
Atsižvelgiant į ekspertinio vertinimo ir daugiakriterinės analizės metu gautus rezultatus nustatyta, kad geriausias iš vertintų kombainų yra PASSAVANT... [toliau žr. visą tekstą]Object of the research: combined mechanical wastewater treatment facilities in the wastewater treatment plants of Balbieriškis, Kaišiadoriai, Pasvalys and Kuršėnai. Aim of research: to analyse the possibilities to apply combined mechanical wastewater treatment facilities, to perform the analysis of advantages and disadvantages of those treatment systems regarding the wastewater characteristics. Objectives of the research: 1. To identify combined wastewater treatment facilities located in the wastewater treatment plants. 2. To select the wastewater treatment plants with different combined wastewater treatment facilities. 3. To analyse the characteristics of wastewater coming into the selected wastewater treatment systems. 4. To perform the analysis of advantages and disadvantages of combined treatment facilities in the selected objects. Method of the research: expert evaluation (visual evaluation). Results of the research: A short description of the selected objects where different combined mechanical wastewater treatment systems are installed. Technical characteristics and operation of combines are described. An evaluation of combines is performed according to the following criteria: technical reliability of systems, technological stability of treatment processes, peculiarities of treatment plant monitoring and exploitation, peculiarities of maintenance and permanent repair of treatment plant systems. The received results of combine evaluation are used for... [to full text]
39
Milan, Rackov. "Концепције развоја универзалних зупчастих редуктора." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2013. https://www.cris.uns.ac.rs/record.jsf?recordId=85580&source=NDLTD&language=en.
Full textAbstract:
Дат је детаљан преглед садашњих концепцијских решења и начинамонтаже савремених универзалних зупчастих редуктора.Карактеристике ових решења анализиране су посредством јединичних икомплексних показатеља квалитета. Резултати те анализе приказани суна систематичан и јасан начин, коришћењем табела, дијаграма и схема.Тумачење резултата је јасно и адекватно, с нагласком на значајнеделове који су од посебне важности. Предложено решење зупчастогредуктора за усвојену осну висину је коректно дефинисано ипостављено на основу претходно извршених анализа. Начин усвајањазупчастих парова, као и појединих конструкционих решења извршен јена јасно образложен начин. Такође, дат је предлог за увођење зубаца саповећаном теменом висином.Dat je detaljan pregled sadašnjih koncepcijskih rešenja i načinamontaže savremenih univerzalnih zupčastih reduktora.Karakteristike ovih rešenja analizirane su posredstvom jediničnih ikompleksnih pokazatelja kvaliteta. Rezultati te analize prikazani suna sistematičan i jasan način, korišćenjem tabela, dijagrama i shema.Tumačenje rezultata je jasno i adekvatno, s naglaskom na značajnedelove koji su od posebne važnosti. Predloženo rešenje zupčastogreduktora za usvojenu osnu visinu je korektno definisano ipostavljeno na osnovu prethodno izvršenih analiza. Način usvajanjazupčastih parova, kao i pojedinih konstrukcionih rešenja izvršen jena jasno obrazložen način. Takođe, dat je predlog za uvođenje zubaca sapovećanom temenom visinom.
Detailed overview of current solutions and conceptual mounting ways ofmodern universal helical gear reducer is presented. The characteristics ofthese solutions are analyzed by means of the unit and complex qualityindicators. The results of this analysis are presented in a systematic andclear way, using tables, charts and diagrams. Interpretation of the results isclear and appropriate, with an emphasis on the important parts of which areof particular importance. The proposed solution of gear reducer for adoptedshaft height is correctly defined and set to the previously performed analysis.The way the adoption of gear pairs, as well as some innovative designs areexecuted on clearly reasoned manner. Also, a proposal for the introduction ofhigh contact ratio is given.
40
Asbjørn, Sörensen Charlotte. "A Material Framework for Product Design." Licentiate thesis, Malmö universitet, Malmö högskola, Institutionen för konst, kultur och kommunikation (K3), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-7446.
Full textAbstract:
A new paradigm is slowly making its way into society, affecting our material practice as designers. Materials selection in design and product development has for a long time been dominated by a purely technical approach, mainly focusing on properties and performance. With the increasing evidence of climate change, waste and pollution, environmental effects, we are slowly realizing that unsustainable consumption of materials is no longer an alternative. Previous studies of material practices, both within design educations and the design profession, has primarily dealt with the development of material related methods. This thesis has focused on gaining an in-depth understanding of material practices within design processes, in order to develop a pedagogical framework that facilitates the development of reflective material practices in design education. There are four primary aims of the research presented in this licentiate thesis: (1) ascertain obstacles in the traditional ways of teaching materials to design students, (2) to bridge the differences in language, research culture and pedagogic approaches in design education, (3) to investigate current professional material practices in industrial design, and (4) to develop a new material framework for teaching reflective material practices for design students. During the project, the material framework has been tested and evaluated in two mandatory material courses with first and second year bachelor students from Product Design education over a period of four academic years. A comparative case study was conducted with five design consultancies. The qualitative interviews were transcribed and analysed using category zooming. The outcomes of this research are: (1) a new pedagogic framework for teaching materials to Product Design students in higher education, and (2) insights into professional practices of selecting and designing with materials. The pedagogic model A Material Framework for Product Design is designed to facilitate the development of reflective material practices in design education. The Framework consist of four levels: (1) a pedagogical foundation based on Experiential Learning theory that provide a framework for how to approach teaching and learning, (2) designing and structuring learning activities, (3) creating learning environments that facilitate learning activities, and (4) defining learning objectives, assessment of learning outcomes and detecting signs of learning. The main insights from the study of professional practices suggest: (1) that risk management has a major influence on the material selection process, (2) that negotiations of project boundaries in the ‘fuzzy’ pre-design phase has crucial influence on the risk management aspect of the material criteria activities, and (3) a lack of awareness, that design briefs usually outline material criteria expressed as sensorial characteristics, which are later translated by engineering into final material criteria used for the material selection process. The findings implies that design students would benefit from developing reflective material practices in design education.
41
Двойнос, С. О. "Проєкт вантажного автомобіля /комплексний проєкт/ з розрахунком коробки перемикання передач та розробкою технологічного роцесу відновлення вилки карданного вала." Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/23191.
Full textAbstract:
Двойнос, С. О. Проєкт вантажного автомобіля /комплексний проєкт/ з розрахунком коробки перемикання передач та розробкою технологічного роцесу відновлення вилки карданного вала : випускна кваліфікаційна робота : 274 «Автомобільний транспорт» / С. О. Двойнос ; керівник роботи Я. В. Кужельний ; НУ "Чернігівська політехніка", кафедра автомобільного транспорту та галузевого машинобудування. – Чернігів, 2021. – 147 с.Під час виконання магістерської випускної роботи, визначили параметри автомобіля його масові показники, провели розрахунок двигуна автомобіля, розрахували навантаження на КШМ, розрахували показники динамічності автомобіля, його гальмівні властивості й паливну економічність. У спеціальній частині магістерської роботи було розглянуто види коробок перемикання, виконали розрахунок коробки перемикання передач. У продовженні спеціальної частини виконали відновлення вилки кардану, яке включає в себе, аналіз та характеристику деталі, вибір способів та методів відновлення, вбір обладнання для відновлення, розрахунок припускі, вибір режимів обробки з подальшим розрахунком норм часу. В написаному висновку підсумували всі результати та пророблену роботу.
During the master's thesis, the parameters of the car were determined by its mass indicators, the car engine was calculated, the load on the CSM was calculated, the dynamics of the car, its braking properties and fuel economy were calculated. In the special part of the master's thesis the types of gearboxes were considered, the calculation of the gearbox was performed. In continuation of the special part, the cardan fork was restored, which includes analysis and characteristics of the part, selection of methods and methods of restoration, selection of equipment for restoration, calculation of allowances, selection of trim modes with subsequent calculation of time norms. The written conclusion summarized all the results and the work done.
42
Benetka, Martin. "Analýza, návrh a optimalizace automobilového startéru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220715.
Full textAbstract:
This thesis aims at automotive starters, their construction, characteristics and problems with starting at low temperatures. There are kinds of starters, function principle, construction, advantages and disadvantages in the first part of thesis. Issues with combustion engine starting and basic technical requirements are also mentioned here; characteristics and importance of starters and combustion engines are also described. Last chapters of this part are dedicated to finite element method and its implication. There are analytical calculations of starter in the second part of thesis. Results are compared with experimental obtained (measured) values and results from RMxprt. Finite element method results are compared, too. Magnetic induction improvement in stator is also suggested.
43
Nycander, Lovisa. "Evaluation tool for solving local power and capacity deficit." Thesis, KTH, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-283647.
Full textAbstract:
Sweden has a goal of becoming carbon neutral by 2045. To reach this goal electrification of different sectors are one of the most important pathways for becoming fossil free. The power grid in Sweden has historically been seen as stable and with unlimited transmission capacity. However, with increasing power demand of electricity in society the transmission capacity is becoming limited. In short term this can delay development of new district and housing projects. In long term capacity deficit could prevent the opportunity of electrification project replacing fossil fuel for the transport and industry sector. This could have a negative impact on both Sweden’s competitiveness and ability to become carbon neutral. As an industry player with the aim of providing leading solutions for sustainable development, AFRY has an interest in finding solutions enabling a transition to a fossil free energy use. With capacity deficits in the power grid becoming a growing problem for metropolitan areas, AFRY has requested tool that can evaluate technical solutions for solving local power deficits. The aim of this thesis is thus to develop an evaluation tool for comparing technical solutions for solving local power deficit. Based on a literature review identifying suitable technologies; reinforcing local power grids, implementing BESS or combined BESS PV systems to a local power grid are the technical solutions chosen for this study. With the compiled technical key characteristics and component costs fort the technologies the tool is developed in Excel. From testing the tool with different cases, combined BESS PV solution is seen to have the lowest investment cost if the local power deficit is low. If the deficit is high, reinforcing the grid with transformer and substation capacity is the solution whit the lowest investment cost.Sverige har som mål att inte ha några nettoutsläpp av växthusgaser till atmosfären till 2045. För att uppnå detta mål är elektrifiering av olika sektorer sett som ett av de viktigaste spåren mot en fossilfri framtid. Elnätet i Sverige har historiskt set varit stabilt och med en näst intill obegränsad överföringskapacitet. Men med ett ökande effektbehov av el i samhället börjar den befintliga överföringskapaciteten bli begränsad och i vissa fall otillräcklig. På kort sikt kan detta försena utvecklingen av nya stads- och bostadsprojekt. På lång sikt kan kapacitetsbrist förhindra möjligheten av elektrifieringsprojekt med syfte att ersätta fossila bränslen inom transport- och industrisektorn. Detta kan påverka Sveriges konkurrenskraft och mål att inte ha några nettoutsläpp av växthusgaser negativt. Som en aktör med målet att tillhandahålla ledande lösningar för en hållbar framtid har AFRY ett intresse av att finna lösningar som möjliggör en omställning till fossilfri energi. Eftersom kapacitetsbrist i elnätet är ett växande problem i och runt storstadsregioner, har AFRY efterfrågat ett verktyg som kan utvärdera tekniska lösningar för att möta lokal effektbrist. Syftet med denna studie är där med att utveckla ett utvärderingsverktyg som jämföra tekniska lösningar för att möta lokal effektbrist. Genom en litteraturstudie har kunskap om olika tekniska lösningar sammanställts och förstärkning av lokala elnät, implementering av BESS eller kombinerade BESS PVsystem till det lokala elnätet inkluderats som lösningar i denna studie. Tillsammans med de tekniska parametrarna och investeringskostnader för teknikerna utvecklas ett analysverktyg i Excel. Från att ha testat olika fall i verktyget kan den kombinerade BESS PV-lösningen ses ha den lägsta investeringskostnaden om effektbristen är låg. Om effektbristen där emot är hög är utbyggnad av transformator och nätstations kapacitet i det lokala elnätet lösningen med lägst investeringskostnad.
44
Klügl, Martin. "Úsporné ventilátory v technice prostředí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240185.
Full textAbstract:
This Thesis deals with the fans, their properties and characteristics. The Project part is about design of the HVAC equipment in the centralised and decentralised option for the assigned building. The Project part is focused on the design and evaluation of the fans more specifically. The Experimental part is about measurement of parameters and characteristics of the fans. The results are analyzed and compared. The results are compared with current energy efficiency reguirements for fans.
45
Röhr, Kristin Helga [Verfasser], Torsten [Akademischer Betreuer] Schlesinger, Torsten [Gutachter] Schlesinger, Claudia [Gutachter] Voelcker-Rehage, and Christian [Gutachter] Maiwald. "Gesundheitsrelevante Charakteristika von Führung an Hochschulen aus Mitarbeiter- und Vorgesetztenperspektive : Health-relevant characteristics of leadership at universities from an employee and supervisor perspective : An investigation of scientific and non-scientific staff using the case study of a technical university / Kristin Helga Röhr ; Gutachter: Torsten Schlesinger, Claudia Voelcker-Rehage, Christian Maiwald ; Betreuer: Torsten Schlesinger." Chemnitz : Universitätsverlag Chemnitz, 2021. http://d-nb.info/1231440813/34.
Full text
46
Pacut, Patrik. "Konstrukce zařízení pro měření charakteristik pneumatiky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241865.
Full textAbstract:
The aim of this thesis is a method selection and design of measuring device for experimental identification of directional tire characteristics for passenger cars. The first part analyse directional characteristic and method of measurement. The next part focuses on the design of the measuring trailer and selecting measuring equipment with description.
47
Sůkal, Jaroslav. "Určení pracovního bodu či pracovní oblasti spolupracujících hydrodynamických čerpadel." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229946.
Full textAbstract:
The aim of my diploma thesis is to create a computer program that will help planners to design pipe systems. The program enables to find the parameters of a pumping unit (such as flow, head, power, efficiency, dissipation etc.) in a parallel pipe system which even has two tanks with dissimilar height. Moreover, the program is able to “calculate” the parameters of pumps that have maximum efficiency so that the planner could easily compare the data and determine whether the pump is working near the optimal point. The introduction includes a short overview of issues connected with pumping equipment. The next part deals with a description of software solutions of individual problems. The thesis concludes with a manual of the designed computer program.
48
Nasir, Muhammad-Iftikhar, and Rizwan Iqbal. "Evolvability of Software Systems." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4053.
Full textAbstract:
Software evolvability, meeting the future requirements of the customer is one of the emerging challenges which software industry is facing nowadays. Software evolvability is the ability of software system to accommodate future requirements. Studies have shown that software evolvability has large economic benefits but at the same time it’s difficult to assess. Over the time many methods have been derived to assess the software evolvability. Software evolvability depends upon various characteristics of the software system. In this paper we will discuss different characteristics of the software systems on which software evolvability depends. We will also have a look on hierarchy of these characteristics based on their role in the evolvability of software system. Moreover we will find out that what level of qualifications is appropriate for an expert to assess the software evolvability of a software systemSoftware evolvability plays an important role in the software life cycle. It is ease with which software system can be modified for future requirements. There are different methods for assessing the software evolvability. Mainly, structural measures; expert assessment and combined approach. Structural approach focus on the class level measures i.e. inheritance, modularity, coupling etc. Whereas, the expert assessment approach utilizes experts opinion regarding the software system i.e. how much it is evolvable? Combined approach is a combination of structural measures and expert assessment. According to David E. Peercy software evolvability depends upon six factors i.e. modularity, descriptiveness, consistency, simplicity, expandability and instrumentation. However, David A. Sunday considered five factors which are modularity, descriptiveness, consistency, testability and changeability. Moreover, there are other factors which also influence the software evolvability i.e. skills and qualification of the maintainer, organizational support to evolvability and characteristics of the methods being used for maintenance. The importance of research methodology can't be neglected because it gives us thought about our research before start. It has a positive impact on research. We are able to understand the structure of our work and have rough idea about research procedure. Our research methodology on theme evolvability of software systems is consistent of few steps. These steps are literature review, informal discussions and then development of a questionnaire. Subsequently questionnaire is distributed to the subjects and conclusions are drawn, based on their feedback and analysis of results. We visited different software houses and discussed all the factors related to the survey. Experienced and qualified professionals were selected as subjects. To get the survey feedback we made phone calls, email reminders and personal meetings. Which result in high survey response i.e. 75%. Questionnaire was designed into three parts namely as personal information, characteristics of software evolvability and qualifications required for an expert. Pre-test was also designed to assure that the questions for the survey were properly defined and participants had no difficulty in understanding them. Participants of the survey included software developers, team leads, software testers and research students. Special consideration was given to the ethical issues in design and conduction of survey. We discussed about the response behavior of the participants analysis of the data we collected from survey. Analysis was conducted by different means like standard deviation, mean, medium, mode and variance in survey results. First part of the analysis is about what characteristics of the software which effect software evolvability and their priority. In this part we concluded that there are total eleven characteristics of the software evolvability out of which design and architecture is highly prioritized while technical platform and comments are least prioritized characteristics. In the second part of the analysis we concluded that technical training and quality assurance management experience are most important criteria for an expert while development experience and testing experience is least important In the last part of the thesis we discussed the research work, validity assessment of results and answers to the questions. We used A Lincoln‘s and Cuba’s criterion for validation assessment to support the validity of results. Validity is judged by four aspects credibility, transferability, dependability and conformability.
49
Lingaitienė, Olga. "Transporto priemonių poreikio modeliavimas krovinių vežimo logistikos grandyje." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20061204_162027-19274.
Full textAbstract:
The present work focusses on the rational and complex use of land and water transport, depending of the type of goods, technical characteristics of particular transport facilities (speed, capacity, environmental pollution, fuel consumption) and the particular meand of transport (automobiles, rail transport or ships).
50
Kraśniewski, Jarosław. "Measurements of transient thermal characteristics of microwave transistors : PhD thesis summary." Rozprawa doktorska, [s.n.], 2009. http://dlibra.tu.koszalin.pl/Content/1196.
Full text