Relevant bibliographies by topics / Chemical engineering, examinations, questions, etc

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Academic literature on the topic 'Chemical engineering, examinations, questions, etc'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 January 2023

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Journal articles on the topic "Chemical engineering, examinations, questions, etc"

1

Ndegwa Ndirangu, Peter, Elizaphan Maina Muuro, and John Kihoro. "A Literature Review on Automatic Generation of Examinations." OPEN JOURNAL FOR INFORMATION TECHNOLOGY 4, no. 2 (December 30, 2021): 77–84. http://dx.doi.org/10.32591/coas.ojit.0402.04077n.

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The examination is a key activity in determining what the learner has gained from the study. Institutions of higher learning (IHL) perform this activity through various assessment methods (test/examination, practical, etc.). The world today is focused on automation of exam generation which is ongoing with dire need during this period of the COVID-19 pandemic when education is greatly affected, leading to embracing online learning and examination. A text/exam comprises questions and answers that focus on evaluation to determine the student’s conversant level in the area of study. Each question has a cognitive level as described by (Armstrong, 2016) in the revised Bloom’s taxonomy. Questions chosen have cognitive levels based on the level of study and standardization of the exam. There is, therefore, a need to consider the question’s cognitive level along with other factors when generating an examination by incorporating deep learning algorithms.
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Krupka, A., L. Duz, M. Kraliuk, and Ye Yakovlieva. "Judicial engineering and mechanical examination: practiceological approach." National Technical University of Ukraine Journal. Political science. Sociology. Law, no. 3(47) (January 29, 2021): 80–85. http://dx.doi.org/10.20535/2308-5053.2020.3(47).229484.

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The purpose of the article is to study and develop theoretical and methodological principles of forensic engineering and mechanical expertise, recommendations with the use of special knowledge in criminal and civil proceedings to prevent, detect, investigate and consider crimes related to the operation of machines, mechanisms, equipment and improvement of its methodology, substantiation and formulation of recommendations on legal assessment of results and increase of efficiency of use of conclusions of forensic examination in the course of proving. The methodological basis of the study are the laws and categories of the theory of cognition, in particular the provisions of materialist dialectics, which contributed to the realization of the purpose and tasks, subject, object, research issues in the context of interdependence of achievements and needs of practice. At the same time, the methods of formal logic (analysis, synthesis, deduction, induction, analogy, abstraction) made it possible to understand in more detail the content of the studied questions, the essence of the studied categories and phenomena was clarified by the system-structural method. The Ministry of Justice of Ukraine has created a new type (subtype) of forensic examination: “Mechanical Engineering” and forensic specialty 10.25 “Study of the technical condition and operating conditions of machines and mechanisms”, so the article formulates the basic concepts of forensic mechanical examination, namely : the basic questions which are solved by judicial engineering and mechanical examination are defined; tasks, subject, object, questions that give the opportunity to understand the essence and content of the expert activity of these studies; the tasks of a specific examination are distinguished from the tasks of other related types of examinations in this area. Complex problems facing the investigation / court determine the expediency of dealing with a wide range of topical issues on a scientific basis, taking into account the peculiarities of the study of technical condition and operating conditions of machines, mechanisms and equipment and create a new type of forensic engineering – mechanical engineering. In order to increase the efficiency and objectivity of investigations of crimes in the operation of machines, mechanisms and equipment, courts / investigators should, as necessary, conduct forensic examinations by engineers: technologists, mechanics, power engineers, metallurgists, etc., for which it is necessary to develop approach, scientific-theoretical and practical principles of forensic engineering and mechanical expertise.
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Bonse, Jörn, and Stephan Gräf. "Ten Open Questions about Laser-Induced Periodic Surface Structures." Nanomaterials 11, no. 12 (December 7, 2021): 3326. http://dx.doi.org/10.3390/nano11123326.

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Laser-induced periodic surface structures (LIPSS) are a simple and robust route for the nanostructuring of solids that can create various surface functionalities featuring applications in optics, medicine, tribology, energy technologies, etc. While the current laser technologies already allow surface processing rates at the level of m2/min, industrial applications of LIPSS are sometimes hampered by the complex interplay between the nanoscale surface topography and the specific surface chemistry, as well as by limitations in controlling the processing of LIPSS and in the long-term stability of the created surface functions. This Perspective article aims to identify some open questions about LIPSS, discusses the pending technological limitations, and sketches the current state of theoretical modelling. Hereby, we intend to stimulate further research and developments in the field of LIPSS for overcoming these limitations and for supporting the transfer of the LIPSS technology into industry.
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Riza, Lala Septem, Rendi Adistya Rosdiyana, Alejandro Rosales Pérez, and Asep Wahyudin. "The K-Means Algorithm for Generating Sets of Items in Educational Assessment." Indonesian Journal of Science and Technology 6, no. 1 (January 19, 2021): 93–100. http://dx.doi.org/10.17509/ijost.v6i1.31523.

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In a national-scale educational assessment system, such as the National Examination, the need for several sets of questions that have the same level of difficulty is very required to avoid cheating by students. Therefore, the objective, which is to make a set of questions with the same level of difficulty automatically, is done in this research. It used a machine learning approach, namely K-Means. To achieve this goal, several following procedures need to be implemented. Firstly, we need to create banks of questions to be assigned to students. Then, we build training data by determining the value of each question based on Bloom's Taxonomy, item characters/types, and other parameters. Then, with utilizing K-Means, several cluster centers are obtained to represent the uniformity of the questions in the cluster members. By using several heuristics criteria defined previously, several sets or packages of questions that have the same characteristics and difficulty levels are obtained. From the experiments conducted, the analysis with descriptive (i.e., mean, standard deviation, and data visualization) and inference (i.e., ANOVA) statistics of results are presented showing that questions of each sets have the same characteristics to ensure the fairness of examinations. Moreover, by using this system, the contents of the questions in the generated set do not need to be the same, the package of questions can be generated automatically quickly, and the level of the difficulties can be measured and guaranteed.
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Xu, Jun, Günter Reiter, and Rufina Alamo. "Concepts of Nucleation in Polymer Crystallization." Crystals 11, no. 3 (March 19, 2021): 304. http://dx.doi.org/10.3390/cryst11030304.

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Nucleation plays a vital role in polymer crystallization, in which chain connectivity and thus the multiple length and time scales make crystal nucleation of polymer chains an interesting but complex subject. Though the topic has been intensively studied in the past decades, there are still many open questions to answer. The final properties of semicrystalline polymer materials are affected by all of the following: the starting melt, paths of nucleation, organization of lamellar crystals and evolution of the final crystalline structures. In this viewpoint, we attempt to discuss some of the remaining open questions and corresponding concepts: non-equilibrated polymers, self-induced nucleation, microscopic kinetics of different processes, metastability of polymer lamellar crystals, hierarchical order and cooperativity involved in nucleation, etc. Addressing these open questions through a combination of novel concepts, new theories and advanced approaches provides a deeper understanding of the multifaceted process of crystal nucleation of polymers.
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6

Wierzchoń, Tadeusz, Halina Garbacz, and M. Ossowski. "Structure and Properties of Ti-Al Intermetallic Layers Produced on Titanium Alloys by a Duplex Treatment." Materials Science Forum 475-479 (January 2005): 3883–86. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.3883.

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The rapid progress in engineering enhances the demands set on materials requiring better mechanical properties, resistance to frictional wear, corrosion and erosion etc. These demands can be also satisfied by e.g. applying various surface engineering techniques which permit modifying the microstructure, phase and chemical composition of the surface layers produced on the treated parts. A prospective line of the development is the production of the intermetallic layers by combining various methods aimed to improve essentially the performance properties and service life of the treated parts. The paper presents properties of the Al2O3+TiAl3+TiAl+Ti3Al type layer produced on titanium alloy Ti6Al2Cr2Mo by duplex method combined with magnetron sputtering process of aluminium coating with a glow discharge assisted treatment. The results of the examinations: microstructure, chemical and phase composition, frictional wear resistance and mechanical properties are discussed. Produced composite surface layers have the diffusion character and a precisely specified structure, chemical and phase composition and good wear and corrosion resistance what can widen significantly application range of treated parts.
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Cuong, Do Hong, Vu Van Tam, Hoang Quy Tinh, Le Thanh Do, Nguyen Trong Nghia, and Hoang Cong Anh. "Research on Nutrition, Dental Caries Status Using Novel Methods, and Related Factors to Preschool Children in Rural Areas of Vietnam." Journal of Analytical Methods in Chemistry 2022 (May 30, 2022): 1–6. http://dx.doi.org/10.1155/2022/7363163.

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The study aims to examine correlations between nutrition status with different factors and dental caries of preschool children in rural areas of Vietnam. A big data based on a total of 690 children (356 boys and 334 girls), aged 2–5 years, living in Van Xuan commune, were thoroughly analyzed. Oral examinations were performed by dentists with the assistance of nursery teachers and the research team. Caries was diagnosed using criteria established by the International Caries Detection and Assessment System (ICDAS). The examined children and their parents responded to questions pertaining to dental hygiene practices. The nutrition status of preschool children was determined by the World Health Organization (WHO) standards in 2006. There are factors which have effects on the malnutrition status of children in the research. The prevalence of dental caries also contributed importantly to assess children’s development. In this study, the stunting groups have a higher ratio of caries compared to the others. Children’s morphology and nutritional status are associated with dental caries among the preschool children in Van Xuan commune, Vinh Tuong district, Vinh Phuc province.
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Favre, Eric. "Membrane Separation Processes and Post-Combustion Carbon Capture: State of the Art and Prospects." Membranes 12, no. 9 (September 14, 2022): 884. http://dx.doi.org/10.3390/membranes12090884.

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Membrane processes have been investigated for carbon capture for more than four decades. Important efforts have been more recently achieved for the development of advanced materials and, to a lesser extent, on process engineering studies. A state-of-the-art analysis is proposed with a critical comparison to gas absorption technology, which is still considered as the best available technology for this application. The possibilities offered by high-performance membrane materials (zeolites, Carbon Molecular Sieves, Metal Oxide Frameworks, graphenes, facilitated transport membranes, etc.) are discussed in combination to process strategies (multistage design, hybrid processes, energy integration). The future challenges and open questions of membranes for carbon capture are finally proposed.
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9

Talarska, Patrycja, Maciej Boruczkowski, and Jakub Żurawski. "Current Knowledge of Silver and Gold Nanoparticles in Laboratory Research—Application, Toxicity, Cellular Uptake." Nanomaterials 11, no. 9 (September 21, 2021): 2454. http://dx.doi.org/10.3390/nano11092454.

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Silver and gold nanoparticles can be found in a range of household products related to almost every area of life, including patches, bandages, paints, sportswear, personal care products, food storage equipment, cosmetics, disinfectants, etc. Their confirmed ability to enter the organism through respiratory and digestive systems, skin, and crossing the blood–brain barrier raises questions of their potential effect on cell function. Therefore, this manuscript aimed to summarize recent reports concerning the influence of variables such as size, shape, concentration, type of coating, or incubation time, on effects of gold and silver nanoparticles on cultured cell lines. Due to the increasingly common use of AgNP and AuNP in multiple branches of the industry, further studies on the effects of nanoparticles on different types of cells and the general natural environment are needed to enable their long-term use. However, some environmentally friendly solutions to chemically synthesized nanoparticles are also investigated, such as plant-based synthesis methods.
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Moorehead, W. "Daily Analytical Problem Solving in Criminalistics with Rapid and Reliable Advanced Instrumentation - the Microscope." Microscopy and Microanalysis 7, S2 (August 2001): 468–69. http://dx.doi.org/10.1017/s1431927600028415.

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Forensic science incorporates many different scientific disciplines: criminalistics, toxicology, pathology, entomology, engineering, psychology, accounting, etc. Criminalistics incorporates such diverse areas as crime scene investigation, sexual assault evidence, DNA analysis, firearms identification and comparison, drug analysis, impression evidence, and trace evidence.A variety of microscopes and microscopical techniques are used to answer “real world” questions about physical evidence in criminalistics. The microscopes most often used include stereo (dissecting), biological (brightfield), polarizing light, phase contrast, fluorescence, transmitted light comparison, reflected light comparison, and scanning electron. Additionally, detectors from different areas of the electromagnetic spectrum have been added to microscopes to enhance the information obtained from a specimen: infrared, visible-ultraviolet, and x-ray. to gather more information about the specimen with visible light microscopes, dispersion staining(1), contrast enhancement techniques(2) fusion methods(3), chemical staining(4), and micro-chemical tests(5,6) can be integrated into the analytical scheme.
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Books on the topic "Chemical engineering, examinations, questions, etc"

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Robinson, Randall N. Chemical engineering practice exam set. 3rd ed. Belmont, CA: Professional Publications, 1996.

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2

Vasquez, Marta. Chemical engineering PE practice exam. Belmont, California: Professional Publications, Inc., 2013.

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K, Das Dilip. Chemical engineering: PE license review. 4th ed. La Crosse, WI: Kaplan AEC Education, 2013.

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4

N, Robinson Randall, ed. Solutions manual for the Chemical engineering reference manual. Belmont, CA: Professional Publications, 1996.

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Practice problems for the chemical engineering PE exam: A companion to the Chemical Engineering Reference Manual. Belmont, California: Professional Publications, Inc., 2013.

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Practice problems for the chemical engineering PE exam: A companion to the Chemical engineering reference manual. 6th ed. Belmont, CA: Professional Publications, 2004.

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7

Lopina, Stephanie T. Chemical discipline-specific review for the FE/EIT exam. 2nd ed. Belmont, CA: Professional Publications, 2006.

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Lopina, Stephanie T. Chemical discipline-specific review for the FE/EIT exam. Belmont, Calif: Professional Publications, 1997.

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9

Association, Research and Education, ed. The handbook of chemical engineering. Piscataway, NJ: Research and Education Association, 1999.

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N, Robinson Randall, ed. Chemical engineering reference manual for the PE exam. 6th ed. Belmont, CA: Professional Publications, 2004.

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Conference papers on the topic "Chemical engineering, examinations, questions, etc"

1

Narayanan, Mysore. "A Learner-Centered Student Course Portfolio." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56861.

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In this short paper the author tries to explain how a learner-centered student course portfolio has helped him to document the educational outcomes. The author has taught and is currently teaching the subject matter of Hydraulics, Hydrology and Fluid Mechanics at an undergraduate level. Here the author tries to correlate the assessment of student learning to the assessment of instructor teaching methodologies. It is well known that industry is in need of employees that are committed to long-term development and continuous improvement. The key element here is to recognize the fundamental concept that teaching and learning are connected and therefore it is essential that the interaction between the instructor and learner is properly documented in the portfolio. (Cerbin, 1994). While addressing these issues, the author raises five questions: 1. What should be counted as appropriate goals in an undergraduate engineering course that has a significant laboratory component? 2. Are the teaching practices utilized by the instructor in this course providing reasonably acceptable paths toward accomplishing the specified learning goals? 3. What do students actually accomplish in the course and the laboratory exercises and how does the instructor’s teaching methodologies contribute to students’ intellectual development and progress? 4. How does the instructor respond to students’ learning difficulties? Does the teacher revise the teaching strategies to address such problems? 5. What impact does this type of teaching have on students’ life-long learning attitudes? Are they able to “learn, how to learn.” A course portfolio is deemed as a specified document that represents the specific accomplishments of the student and is structured to explain what, how and why the students learnt in that particular course. The portfolio shall include everything that was accomplished in that particular course. It should contain a teaching statement that provides a flow-chart. (Knapper, 1995). Further, an assessment analysis of student learning should be supported by class work, problem sets, quizzes, examinations, research reports, term papers, examinations, laboratory reports, etc. An analysis of student feedback is essential to document teaching effectiveness. Finally, a comprehensive course summary. The summary should describe the strengths and weaknesses of the course in terms of students’ learning. (Richlin, 1995).
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Ogawa, Takeshi, Motoki Nakane, Kiyotaka Masaki, Shota Hashimoto, Yasuo Ochi, and Kyoichi Asano. "Investigation of Effect of Pre-Strain on Very High-Cycle Fatigue Strength of Austenitic Stainless Steels." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48811.

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The austenitic stainless steels have excellent mechanical and chemical characteristics and these materials are widely used for the main structural components in the nuclear power plants. A part of structural components using these materials is considered to have strain-history by machining, welding and etc in the process of manufacturing and these parts would be hardened because these materials have a remarkable work-hardening property. On the other hand, conventional studies for the fatigue strength used to be investigated by the results of fatigue tests applying normal specimens without the effect of hardening by pre-strain. This paper describes the effect of large pre-strain on very high cycle fatigue strength of the materials in consideration for the evaluation of strength of actual structures in the nuclear power plants. In order to achieve this purpose, the fatigue tests were carried out with strain hardened specimens. The material served in this study was type SUS316NG. Up to ±20% pre-strain was introduced to the round bar shaped materials by tension and compression load test, and the materials were mechanically machined to the hourglass shaped smooth specimens. On the other hand, the pre-strain of some specimens were introduced after machining so as to study the influence of roughness of the surface of the specimens for the fatigue property. Fatigue tests were conducted by ultrasonic and rotating-bending fatigue test machines and conditions were decided by preliminary examinations to control temperature elevation of the specimen during the fatigue test. The S-N curves obtained from fatigue tests show that increase in magnitude of the pre-strain cause increase in the fatigue strength of the material and this relationship is independent of type of the pre-strains of tension and compression. Though all specimens were fractured by the surface initiated fatigue crack, only one specimen was fractured by the internal crack and so-called “fish-eye” was observed on the fracture surface. However, the internal fracture of the SUS316NG does not cause sudden drop of the fatigue strength. Also, the Vickers hardness tests were carried out to discuss the relationship between fatigue strength and hardness of the pre-strained materials. It is found that the increase in fatigue limit of the pre-strained materials strongly depend on the hardness derived from the indentation size equals to the scale of stage I fatigue crack.
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