Relevant bibliographies by topics / Percentage dissatisfied

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Percentage dissatisfied'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Percentage dissatisfied"

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Liu, S., S. Schiavon, A. Kabanshi, and W. W. Nazaroff. "Predicted percentage dissatisfied with ankle draft." Indoor Air 27, no. 4 (2017): 852–62. http://dx.doi.org/10.1111/ina.12364.

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Liu, Shichao, Zhe Wang, Stefano Schiavon, et al. "Predicted percentage dissatisfied with vertical temperature gradient." Energy and Buildings 220 (August 2020): 110085. http://dx.doi.org/10.1016/j.enbuild.2020.110085.

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Roelofsen, Paul. "Evaluation of environmental noise based upon the percentage of dissatisfied." Journal of Facilities Management 10, no. 2 (2012): 133–39. http://dx.doi.org/10.1108/14725961211218767.

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Mun, Sun-Hye, and Jung-Ho Huh. "Changes in Accumulated Predicted Percentage of Dissatisfied Ratio by Window's Property." Journal of the architectural institute of Korea planning & design 30, no. 2 (2014): 249–56. http://dx.doi.org/10.5659/jaik_pd.2014.30.2.249.

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Broday, Evandro Eduardo, and Antonio Augusto de Paula Xavier. "A method for predicting the Actual Percentage of Dissatisfied (APD) through a simple proposition of thermal comfort zones in a working environment." Work 67, no. 3 (2020): 599–609. http://dx.doi.org/10.3233/wor-203215.

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BACKGROUND: Over the last few decades, there has been a concern to improve the quality of indoor work environments and increase energy efficiency as people spend much of their time in such settings. OBJECTIVE: This study analyzed a group of women developing sedentary activities to determine the Actual Percentage of Dissatisfied (APD) in the environment, considering that all people who voted any value other than zero on the seven-point scale are deemed dissatisfied. METHODS: After this analysis, using the probit regression model, hot and cold air temperature curves were plotted so as to determine in which situation the number of people dissatisfied with the environment is minimal. RESULTS: The results showed an APD of 52.31%, which is different from the ADP recommended by ISO 7730 (2005) [–0.5 < PMV < + 0.5, PPD < 10% ]. The probit analysis using the cut of 10% as dissatisfied, according to category B of ISO 7730 (2005), showed a comfort temperature of 21.1°C, with a comfort temperature range from 19.61 to22.61°C. CONCLUSIONS: Using the fraction of people dissatisfied with the environment (52.31%) as the cutoff, when the air temperature is equivalent to 20.2°C, the lowest percentage dissatisfied by the cold and heat in the environment occurs simultaneously.
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Pereira, Pedro Filipe da Conceição, and Evandro Eduardo Broday. "Determination of Thermal Comfort Zones through Comparative Analysis between Different Characterization Methods of Thermally Dissatisfied People." Buildings 11, no. 8 (2021): 320. http://dx.doi.org/10.3390/buildings11080320.

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In order to maintain thermal comfort and preserve indoor environmental quality, people use heating, ventilation and air-conditioning (HVAC) systems inside buildings. However, buildings must be prepared not only to provide adequate thermal comfort to their occupants but also to align strategies that enable better energy performance. Thus, this work aimed to establish thermal comfort zones (TCZ) through different characterization methods of thermally dissatisfied people. Responses were collected from 481 students, through the application of questionnaires in classrooms, during the Brazilian winter of 2019. Three methods for determining the actual percentage of dissatisfied (APD) were adopted, which generated three different equations, namely: APD_1; APD_2 and APD_3, based on the original Predicted Percentage of Dissatisfied (PPD) equation. By using the probit model, three TCZ were calculated: 17.73–22.4 °C (APD_1); 20.71–20.93 °C (APD_2) and 17.89–24.83 °C (APD_3). In addition, a comfort zone based on the linear regression between the thermal sensation votes and the operative temperature was determined (18.77–22.69 °C). All thermal comfort zones resulting from this work have colder temperatures than that indicated by the American Society of Heating, Refrigerating and Air-Conditioning Engineers—ASHRAE (2017) of 23–26 °C for the winter, showing the potential for energy savings from the adoption of this type of strategy, while maintaining thermal comfort.
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Ibrahim, U. H., C. Nathan, and A. Ayuba. "Predicted percentage dissatisfied (PPD) model evaluation of evaporative cooling potentials of some selected cities in Nigeria." Nigerian Journal of Technology 37, no. 1 (2018): 130. http://dx.doi.org/10.4314/njt.v37i1.17.

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H. Abdelati, Inaam, Om Hashim M. Saadoon, and Amal Roshdi Ahmed Mostafa. "Quality of cesarean section nursing care and its reflection up-on women's satisfaction with labor experience." International Journal of Advanced Nursing Studies 8, no. 1 (2019): 11. http://dx.doi.org/10.14419/ijans.v8i1.27149.

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Women satisfaction is a crucial predictor for maintaining and monitoring the quality of health care and can inform service development and delivery.Aim: To evaluate the quality of cesarean nursing care at hospital of Mansura University, the outcomes of it preserve ad-vanceandsupportqualityof care and womensatisfaction. By using a descriptive design the study conducted at obstetrics and gynecology department in Mansoura university hospital. On a total of 200women had undergoingelective cesarean section operation. Data collection by, structured interviewed questionnaire, observationchecklist and satisfactionassessment scale. Results; Findings indicated that most of studied women had received a complete care during intraoperative & immediate post-operative 92.5% & 95.0% respectively. Meanwhile, 80.0% & 62.5% of them didn't received health education and emotional support also , the higher percentage of studied women were satisfied with general environment, cleanliness, communication and physical care 75.0%, 75.0%, 65.0% and 58.0% respectively. While, 60.0% of them were dissatisfied with continuity of care. Regarding involving in decision making, all of studied sample100% were dissatisfied. Finally there was a positive association of quality of CS nursing care with the level of women's satisfaction with (p=<0.05) .Conclusion: The current study indicated that, there are several factors that affected on women's satisfaction. higher percentages of them were satisfied with general environment, cleanliness, communication and physical care and dissatisfied with psychological care, continuity of care and involvement in decision making. There was a highly statistically associationof women’s satisfaction with CS nursing care offered. Recommendation: Woman satisfaction is an imperative health care outcome its assessment is recommended tobe a part of hospital quality ofcare monitoring and improvement programs.
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Han, Yan Min, Zheng Wei Li, and Peng Xu. "Comparative Study on Energy Consumption of Gas-Fired Infrared Radiant and Convection Heating." Advanced Materials Research 953-954 (June 2014): 849–53. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.849.

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Energy consumption of gas-fired infrared radiant and heat exchanger by convection heating is comparative analyzed, CFD software is used to simulate fields of the temperature and the predicted percentage of dissatisfied. Based on the profiles analysis of comfort index, it is found that the radiant panel can save over 10% than convection heating when implemented in industrial factory building.
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Djordjevic, Ivana Mitrovic, and Dragan Vasiljevic. "The Effect of Sociodemographic Factors on the Patient Satisfaction with Health Care System." Serbian Journal of Experimental and Clinical Research 20, no. 3 (2019): 251–55. http://dx.doi.org/10.1515/sjecr-2017-0042.

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Abstract The goal of this paper is to determine the level of patient satisfaction with health care among adults in the Republic of Serbia and to analyze the correlation between the satisfaction and socio-demographic characteristics of the interviewees. The paper is based on the data provided by the National health survey of the Republic of Serbia. For the purposes of this paper, we used data on age and household of the people aged 19 and more. By eliminating the interviewees who were neither satisfied nor dissatisfied with the health care services, we obtained the sample containing 18.206 interviewees. Demographic characteristics and well-being index represented independent variables in the research. Dependent variable of the patient satisfaction was transformed into a binary variable by categorizing satisfied and very satisfied interviewees into one group and by placing dissatisfied and very dissatisfied interviewees into group of dissatisfied patients. The connection between satisfaction and predictors was examined using Chi-Square test and logistic regression. The percentage of the satisfied patients with health care was 72.9%. The satisfaction level was directly connected to age, gender, marital status, employment, region the interviewee comes from and well-being index. Patients who were more satisfied included older people, women, as well as married people, the unemployed and those living in the cities. The analysis of the financial situation shows that the poorest interviewees were the most satisfied with health care.
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Dissertations / Theses on the topic "Percentage dissatisfied"

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Abreu, Saraiva Freitas Iuri. "Indoor climate : A comparison of residential units in Tjärna Ängar, Borlänge before and after retrofitting." Thesis, Högskolan Dalarna, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:du-30466.

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This study try to understand which aspects were fundamental to indoor climate and how to obtain them in order to provide the best possible experience in the thermal comfort of individuals. Thus, arose the studies of Fanger, which was the seed for a new era of discoveries in the area and founded the knowledge our society have today in this globally used standards and norms. Referring to these fundamental aspects of the indoor comfort, data collection was taken in situ to show in details what was happening. This study was executed in order to demonstrate the differences between the data previous and after a process of retrofitting in dwellings built in the 60s and 70s of the century past, in the district of Tjärna Ängar, Borlänge, Sweden. The comparative results using criteria such as Predicted Mean Vote (PMV), Predicted Percentage Dissatisfied (PPD), Draft Rate (DR), air velocity, Mean Radiant Temperature (MRT), Relative Humidity (RH) and air temperature, showed an improvement in 6 of the 8 parameters analyzed. Confirming the expectation that through the retrofitting the residents will be more satisfied, obtain better quality of indoor climate comfort and also increase occupied area in these dwellings.
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Choonya, Gasper. "Experimental investigation of ventilation performance of corner placed stratum ventilation in an office environment." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29710.

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Energy use in buildings account for about one third of the total global energy supply and contributes as much as 30% of the anthropogenic greenhouse gas emissions. It is estimated that energy use in buildings will increase to 67% by 2030. The need for better thermal comfort and air quality in indoor environments is the leading cause for high energy use in buildings.  Heating, ventilation and air conditioning systems take up about 50% of the total energy use in buildings which is about 10-20% of the national energy use in most developed countries. The development and adoption of sustainable ventilation systems is a viable solution to mitigate climate change and curtail carbon emissions. The experimental study was conducted in a room resembling a modern office in a laboratory environment. The study involved investigating the ability of the system to provide cooling and heating. Concentration decay tracer gas technique using Sulphur hexafluoride (SF6) gas was used to determine the local air change index and air change efficiency in the room. Low-velocity omni-directional thermistor anemometer type CTA88 were used to measure the air velocity and temperature in the room. Smoke was used to visualise the flow patterns created in the room.  The climate chamber was used to mimic climatic conditions in winter. Fifteen cases were investigated with five air flow rates set points (30, 40, 50, 60 and 70 l/s) at three supply air temperatures, i.e., 17.6 °C, 21.0 °C and 25.3 °C. The results of the local air change index and air change efficiency for the nominal supply temperature of 17.6 °C showed that the system had strong characteristics of a mixing ventilation system. At the supply air temperature of 21.0 °C, the performance of the system deteriorated slightly to below that of a mixing ventilation system and could not satisfactorily provide heating at supply temperature of 25.3 °C. Better performance of the system at all supply air temperature setpoints was observed at lower airflow rates. At all supply air temperature setpoints, relatively higher degree of temperature stratification was observed at lower supply. The draught rate levels decreased with increase in supply air temperature and height. The location of the air inlet terminals in relation to the workstations had significant effect on the performance of the system. The stratum ventilation system did not work efficiently because the air streams were heavily mixed before reaching the occupants.
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Martins, António Manuel Quental. "Conforto térmico na indústria do papel." Dissertação, 2011. http://hdl.handle.net/10216/61381.

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Martins, António Manuel Quental. "Conforto térmico na indústria do papel." Master's thesis, 2011. http://hdl.handle.net/10216/61381.

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Books on the topic "Percentage dissatisfied"

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Uma análise da percepção docente, gestora e familiar sobre a qualidade da educação básica em escolas públicas em defesa do modelo cívico-militar. Editora Acadêmica Periodicojs, 2021. http://dx.doi.org/10.51249/hp07.2021.33.

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The objective of this study was to analyze the perception of teachers, managers and family members of the municipal and state education system in a city in the Metropolitan Region of Recife / PE regarding the quality of basic education, difficulties faced, student performance and the process of implementing the civic-military model in the the public school. 64 subjects participated in the study, which were subdivided into 13 managers, 30 teachers working in elementary and high school and 21 parents / guardians of a municipal school and a state school. The instruments used for data collection were 3 (three) electronic questionnaires developed in Google forms, containing objective and subjective questions, directed to managers, teachers and parents / guardians. Quantitative data were treated statistically by the PRISMA for Windows program - Version 4.03 and analyzed by the Chi-square test, with p <0.05, expressed in percentages, and the data referring to the qualitative evaluation were treated through analysis of content, with data represented qualitatively and expressed in a table. It was found in this study, from the perception of teachers, managers and parents about basic education, that the main problems faced are associated with the low interest of students in studies (69.2%; 76.7%, p= 0.032) and lack of adequate structure (50%, p= 0.038). Regarding the contribution of the civic-military model, the study pointed out the improvement of students' behavior in the family, school and social environment (71.4% p= 0.053), improving the quality of basic education with an emphasis on access, permanence and in learning (66.7% p= 0.036), makes the teacher feel valued (61.9% p= 0.042), contributes to preventing violence in the school environment and improving school performance (66.7% p= 0.024), contributes to the promotion of society's moral, civic and patriotic values (81.0 p= 0.031), and based on the current model (55%; 54.2% p= 0.005) of teachers and parents feel dissatisfied. We conclude that the civic-military model can contribute to reducing evasion, valuing the teacher, improving student behavior, improving the quality of basic education with an emphasis on access, permanence and learning and contributing to the promotion of society’s family, civic and patriotic end moral values.
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Book chapters on the topic "Percentage dissatisfied"

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Carlucci, Salvatore. "The Long-Term Percentage of Dissatisfied." In Thermal Comfort Assessment of Buildings. Springer Milan, 2013. http://dx.doi.org/10.1007/978-88-470-5238-3_4.

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Parsons, Ken. "The Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD)." In Human Thermal Comfort. CRC Press, 2019. http://dx.doi.org/10.1201/9780429294983-3.

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Fabbri, Kristian. "The Indices of Feeling—Predicted Mean Vote PMV and Percentage People Dissatisfied PPD." In Indoor Thermal Comfort Perception. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18651-1_4.

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Kosonen, Risto, Mervi Ahola, Kirsi Villberg, and Tarja Takki. "Perceived IEQ Conditions: Why the Actual Percentage of Dissatisfied Persons is Higher than Standards Indicate?" In Sick Building Syndrome. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17919-8_4.

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Hilton, Yvonne R., and Monica Gray. "Improving Minority Student Persistence." In Strategies for Increasing Diversity in Engineering Majors and Careers. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2212-6.ch001.

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Student persistence in college is a major concern for every institution of higher education. Statistics show that the greatest percentage of attrition occurs after the freshman year. Many studies surrounding this phenomenon tend to focus on pre-college predictors to gain knowledge into mass premature departure during the freshman to sophomore transition. However, very few have looked at institutional factors and how they may explain the problem. Further, most research studies have been done at relatively large and predominantly white institution. This chapter investigates student satisfaction with institutional factors at a small Historically Black College and University (HBCU). Specifically, it looks at how the campus environments may impact freshman students' decisions to return for their sophomore year. While freshman students were dissatisfied with certain aspects of the university they consider to be important, the results precluded good prediction in a practical sense if they influence their decision not to return.
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So, Hyo-Jeong. "Designing Interactive and Collaborative E-Learning Environments." In E-Collaboration. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-652-5.ch023.

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Despite the increasing numbers of online courses, there have been several concerns and criticisms related to teaching and learning in e-Learning. Previous research has suggested that students are often dissatisfied and frustrated with their e-Learning courses. A more important issue is that e-Learning has not led to pedagogical changes. A large percentage of e-Learning courses have been developed to deliver simple factual knowledge through tutorial-based instruction. In seeking a paradigm shift from information delivery-centered to learner-centered e-Learning approaches, this chapter suggests that theoretically and empirically grounded design frameworks are required, and that strategies for interactive and collaborative learning should be considered and incorporated in designing learner-centered environments. To identify instructional design strategies, the author critically reviewed and analyzed relevant case studies. Three design guidelines are presented with specific strategies and examples: 1) meaningful opportunities for online collaboration, 2) minimization of communication barriers and maximization of idea sharing, and 3) increasing perceived levels of social presence
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Conference papers on the topic "Percentage dissatisfied"

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Kolková, Zuzana, Peter Hrabovský, and Jozef Matušov. "Analysis of Thermal Comfort and Microclimatic Conditions in Special Workplaces." In 2nd International Conference on Research in Science, Engineering and Technology. Acavent, 2019. http://dx.doi.org/10.33422/2nd.icrset.2019.11.789.

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Microclimatic conditions and thermal comfort are important factors in the design of high quality buildings and the quality of working conditions for people in different operations. The importance of thermal comfort in the indoor environment can not be underestimated. A vast majority of complaints about indoor climate relate to poor thermal comfort. This paper presents an analysis of subjective thermal comfort measurement. The experiments were conducted to collect the data in the real conditions. ComfortSense system was used in these experiments. A Humidity and an Operative probe are available together with application software with graphical presentation of results including the Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied (PPD). The operating conditions are regulated by law in our country. The aim of the legislation is to protect people in the working environment and create appropriate health conditions for them. The goal of a thermal comfort analysis is finding an appropriate function of the physical parameters (background radiant temperature, air temperature, air humidity, wind speed, clothing, metabolic rate, and core temperature), which would yield the corresponding comfort/discomfort level.
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Zheng, Guozhong, Youyin Jing, Hongxia Huang, and Lijun Shi. "Airflow Distribution and Microenvironment Evaluation of MP Task Conditioning System." In ASME 2007 Energy Sustainability Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/es2007-36248.

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During recent years an increasing amount of attention has been paid to air distribution systems with which officer can individually condition the immediate environment of their workstations. Fanger suggested supplying ventilation air that is unmixed with room air, directly to the breathing zone of each occupant. Task conditioning aims to provide each occupant with personalized clean air direct to the breathing zone. Each occupant can control the environment at his/her workplace. Microenvironment of a typical office workplace consisting of movable panel (MP) task conditioning systems was studied by numerical simulation. MP task conditioning systems were operated while a conventional HVAC system supplied air through a diffuser located in the ceiling. Air was exhausted through a ducted ceiling-level grill. Numerical simulation of 3-D turbulent flow (k-ε closure) was separately conducted to study the influence of supply velocity, air blowing distance and size of MP supply outlet on microenvironment. Three task conditioning velocities, 0.6, 0.8 and 1.0m/s, three sizes 0.3×0.15, 0.3×0.1 and 0.25×0.08m and two air blowing distances were studied. In addition to analyzing temperature and velocity distribution, Draught Rating (DR) and Predicted Percentage of Dissatisfied (PPD) of the room and workstation were studied.
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Farooq, Sobia, and Fredericka Brown. "Evaluation of Thermal Comfort and Energy Demands in University Classrooms." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88326.

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The impetus of this study was to evaluate the current HVAC related energy demands of select classroom at The University of Texas at Tyler at present thermal set points and compare the current energy demands with energy demands based on operating the system at the preferred temperature range of occupants. To determine the preferred temperature range of the students at The University of Texas at Tyler, a subjective assessment was performed by questionnaire survey in a selected classroom along with objective measurements of thermal comfort parameters (air velocity, operative temperature and relative humidity). The questionnaire survey included questions about thermal sensation, perception, acceptability, and relevant demographic and clothing data. Using the Fanger’s thermal comfort model, the Predicted Mean Vote (PMV) and Percentage People Dissatisfied (PPD) was calculated from the objective measurements. Regression analysis performed on the survey data provided the range of neutral, preferred and acceptable temperatures in the classroom. The key contributions of this study were: 1) successful implementation of the on field methodology to access thermal comfort in the hot and humid climate of Tyler, Texas, 2) evaluation of the thermal comfort level of the students and faculty at The University of Texas at Tyler, 3) data acquisition of neutral and preferred temperature ranges which can be used as a reference for HVAC design engineers, and 4) comparison of the relationship between thermal comfort level and energy consumption.
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Jing, Youyin, and Guozhong Zheng. "Airflow Distribution and Microenvironment Evaluation of CMP Task Conditioning System." In ASME 2006 International Solar Energy Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/isec2006-99019.

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Microenvironment of a typical office workplace consisting computer monitor panel (CMP) task conditioning systems was studied by numerical simulation. Two CMP task conditioning systems were operated while a conventional HVAC system supplied air through a diffuser located in the ceiling. Air was exhausted through a ducted ceiling-level grill. Numerical simulation by k-ε 3-D turbulent model was conducted to study the influence of supply velocity on microenvironment of CMP task conditioning system. Three task conditioning velocities, 0.8, 1.0 and 1.2 m/s were studied Temperature and velocity distribution, Draught Rating (DR) and Predicted Percentage of Dissatisfied (PPD) of the room and workstation were studied. Results showed that room temperature was distributed by region, and occupant was exactly in supplying area. Temperature around occupant was apparently lower than surrounding temperature. So task conditioning had high air-supplying efficiency. Results also showed that task conditioning can provide excellent working environment when supply velocity were well designed. Task conditioning may cause draught according to conventional thermal comfort standard. When supply velocity is 1.0 or 1.2 m/s, DR around head reached 25 or 30 and PPD reached 12 or 15, so it may be uncomfortable to occupant. However occupant can control supply velocity and air blowing distance of task conditioning system to maintain acceptable thermal comfort. To summarize, flexible control of task conditioning system can create a more comfortable indoor environment.
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Al-Rawahi, Ahmed Khalfan, and Ali Al-Alili. "Indoor Air Quality of an Educational Building and its Effects on Occupants’ Comfort and Performance." In ASME 2017 11th International Conference on Energy Sustainability collocated with the ASME 2017 Power Conference Joint With ICOPE-17, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/es2017-3601.

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Indoor Air Quality (IAQ) studies the air quality inside different types of environments and relates it to the health and comfort of occupants. Understanding and controlling common pollutants indoors can help in decreasing effects and the risks associated with these pollutants. Unhealthy indoor environment could lead to serious problems in people health and productivity. According to ASHRAE, 80–90% of personal time is spent indoors. As a result, indoor air pollution has gained a lot of interest and the number of studies on occupant health inside buildings grew very significantly in the last decades. The purpose of this study is to investigate the effect of indoor air quality inside an educational buildings on occupants’ comfort and performance. Various indoor pollutant such as, Carbon dioxide, Carbon monoxide, Volatile organic compounds, Particulates, and formaldehyde, are measured. The indoor air contaminants will be detected using IAQ measurement devices. The value of the pollutants is compared to maximum allowed values in ASHRAE standard 62.1. In addition, the occupant thermal comfort is reported using two indices which are Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD). The relationship between the performance and the indoor air quality is also discussed. The results will discover the sources of the indoor air pollutants and accordingly suggestions will be given toward improving the indoor air quality. The final results showed that the IAQ is generally in a good condition for the majority of classrooms except for the TVOC which was always at high concentrations. Also, for some classrooms, the CO2 level and the relative humidity were exceeding the maximum limit. Regarding the thermal comfort, all the classrooms do not comply with ASHRAE Standard 55-2013. Therefore, they are not thermally comfortable.
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