The level of knowledge required in engineering education is the major problem that are facing the education process in each university. Universities endeavor to provide their graduated students with the highest levels of tools required to tackle tough challenges. If the students lost the ability to build up the knowledge in the classroom, they will be disable to faced and handle challenges in the real industrial life. Active learning techniques nowadays become an essential ingredient in making students acquire the scientific knowledge. This study devoted to evaluate the Revised Bloom Taxonomy (RBT) on students performance measured by two dimensions; cognitive process dimensions and the knowledge dimensions. It has been found that using RBT to be quite instrumental in motivating students to gain knowledge. In the midterm exam, the students showed better performance in the fourth cognitive process dimension [Analyzing] with approximately 86% with respect to the assigned weight through the exam and they registered more score related to the procedural knowledge 84%. However, the analysis of the final exam showed some deterioration in students performance resulted in increasing of the level of difficulties of the subjected taught after the midterm exam as well as the students most likely were busy in the second part of the term with other commitments related to other university activities. The structure of the RBT could help the instructors to predict and evaluate the performance of their students and design the course assessments/instructional methods to enhance the students to acquire more knowledge through the classroom.
{"title":"Revised Bloom Taxonomy for Mechanical Engineering Courses: Evaluation and Performance","authors":"A. al-Janabi, Issam bait Bahadur, N. Al-Rawahi","doi":"10.2139/ssrn.3510920","DOIUrl":"https://doi.org/10.2139/ssrn.3510920","url":null,"abstract":"The level of knowledge required in engineering education is the major problem that are facing the education process in each university. Universities endeavor to provide their graduated students with the highest levels of tools required to tackle tough challenges. If the students lost the ability to build up the knowledge in the classroom, they will be disable to faced and handle challenges in the real industrial life. Active learning techniques nowadays become an essential ingredient in making students acquire the scientific knowledge. This study devoted to evaluate the Revised Bloom Taxonomy (RBT) on students performance measured by two dimensions; cognitive process dimensions and the knowledge dimensions. It has been found that using RBT to be quite instrumental in motivating students to gain knowledge. In the midterm exam, the students showed better performance in the fourth cognitive process dimension [Analyzing] with approximately 86% with respect to the assigned weight through the exam and they registered more score related to the procedural knowledge 84%. However, the analysis of the final exam showed some deterioration in students performance resulted in increasing of the level of difficulties of the subjected taught after the midterm exam as well as the students most likely were busy in the second part of the term with other commitments related to other university activities. The structure of the RBT could help the instructors to predict and evaluate the performance of their students and design the course assessments/instructional methods to enhance the students to acquire more knowledge through the classroom.<br>","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125103023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
English Abstract: In this research objective were to studies (1) appropriate technology based on knowledge management component in public university lecturers. (2) The confirmatory factor analysis appropriate technology based on knowledge management component in public university lecturers. Using the Delphi technique, the researcher conducted survey the opinions with nineteen experts. Data were collected from the experts three times. The researcher summarized data to create a questionnaire used to elicit data concerning the appropriate technology based on knowledge management component, to survey the opinions of 300 university lecturers. The questionnaire was tested for reliability and was found to display a reliability level of 0.95. Statistical techniques utilized in data analysis were Mdn, quartile deviation (QD) and IQR. And the confirmatory factor analysis by AMOS 5 student version program. Findings show that appropriate technology In this research objective were to studies (1) appropriate technology based on knowledge management component in public university lecturers. (2) The confirmatory factor analysis appropriate technology based on knowledge management component in public university lecturers. Using the Delphi technique, the researcher conducted survey the opinions with nineteen experts. Data were collected from the experts three times. The researcher summarized data to create a questionnaire used to elicit data concerning the appropriate technology based on knowledge management component, to survey the opinions of 300 university lecturers. The questionnaire was tested for reliability and was found to display a reliability level of 0.95. Statistical techniques utilized in data analysis were Mdn, quartile deviation (QD) and IQR. And the confirmatory fac
{"title":"เทคโนโลยีที่เหมาะสมในการจัดการความรู้สำหรับอาจารย์มหาวิทยาลัยของรัฐ (The Technology Appropriate for Knowledge Management of Public University Lecturers)","authors":"Chomsupak Cruthaka","doi":"10.2139/ssrn.3551779","DOIUrl":"https://doi.org/10.2139/ssrn.3551779","url":null,"abstract":"<b>Thai Abstract:</b> การวิจัยนี้มีวัตถุประสงค์ (1) เพื่อศึกษาเทคโนโลยีที่เหมาะสมตามองค์ประกอบของการจัดการความรู้ส าหรับอาจารย์มหาวิทยาลัยของรัฐ (2) เพื่อวิเคราะห์องค์ประกอบเชิงยืนยันของเทคโนโลยีที่เหมาะสมตามองค์ประกอบของการจัดการความรู้ส าหรับอาจารย์มหาวิทยาลัยของรัฐ โดยใช้เทคนิคเดลฟาย 3 รอบส ารวจความคิดเห็นจากผู้เชี่ยวชาญจ านวน 19 คน สรุปและจัดกลุ่มเทคโนโลยีตามองค์ประกอบของการจัดการความรู้ และน ามาสร้างเป็นแบบสอบถามเกี่ยวกับเทคโนโลยีที่เหมาะสมตามองค์ประกอบในการจัดการความรู้ ไปส ารวจความคิดเห็นของอาจารย์มหาวิทยาลัยของรัฐ จ านวน 300 คน ค่าความเชื่อมั่นของเครื่องมือ เท่ากับ .95 การวิเคราะห์ข้อมูลโดยการวิเคราะห์เนื้อหา การหาค่ามัธยฐาน ค่าส่วนเบี่ยงเบนควอไทล์ การวิเคราะห์องค์ประกอบเชิงยืนยันโดยใช้โปรแกรม AMOS 5 student versionผลการวิจัยพบว่า เทคโนโลยีที่เหมาะสมตามองค์ประกอบของการจัดการความรู้ ประกอบด้วย 4 ด้าน คือ (1) ด้านการแสวงหาความรู้ (2) ด้านการสร้างความรู้ (3) ด้านการจัดเก็บและเข้าถึงความรู้ และ (4) ดา้ นการแบ่งปนั แลกเปลย่ี นความรู้ รวมทั้งสิ้น 24 รายการ เป็นเทคโนโลยีที่มีความเหมาะสมอยู่ในระดับมากที่สุด 10 รายการ และมีความเหมาะสมอยู่ในระดับมาก 14 รายการ และผลการวิเคราะห์องค์ประกอบเชิงยืนยันพบว่า โมเดลการวัดเทคโนโลยีที่เหมาะสมทั้ง 4ด้านมีความสอดคล้องกับข้อมูลเชิงประจักษ<br><br><b>English Abstract:</b> In this research objective were to studies (1) appropriate technology based on knowledge management component in public university lecturers. (2) The confirmatory factor analysis appropriate technology based on knowledge management component in public university lecturers. Using the Delphi technique, the researcher conducted survey the opinions with nineteen experts. Data were collected from the experts three times. The researcher summarized data to create a questionnaire used to elicit data concerning the appropriate technology based on knowledge management component, to survey the opinions of 300 university lecturers. The questionnaire was tested for reliability and was found to display a reliability level of 0.95. Statistical techniques utilized in data analysis were Mdn, quartile deviation (QD) and IQR. And the confirmatory factor analysis by AMOS 5 student version program. Findings show that appropriate technology In this research objective were to studies (1) appropriate technology based on knowledge management component in public university lecturers. (2) The confirmatory factor analysis appropriate technology based on knowledge management component in public university lecturers. Using the Delphi technique, the researcher conducted survey the opinions with nineteen experts. Data were collected from the experts three times. The researcher summarized data to create a questionnaire used to elicit data concerning the appropriate technology based on knowledge management component, to survey the opinions of 300 university lecturers. The questionnaire was tested for reliability and was found to display a reliability level of 0.95. Statistical techniques utilized in data analysis were Mdn, quartile deviation (QD) and IQR. And the confirmatory fac","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134087880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Devi, Y. Vijayalata, N. Raju, J. N. Murthy, J. Praveen, K. V. S. Raju
Digital technologies in teaching and learning encourage active learning, knowledge construction and exploration and also allow information sharing between teachers and/ or learners at same/different physical locations. GRIET FINISHING SCHOOL(GFS) is unique initiative training program with the motivation that all students with variety of backgrounds like rural/urban, medium of instruction, societal and culture forms will complete their course as per their respective academic calendar and be ready to take up the careers of their choice. The knowledge transformation through digital technology is playing a vital role in achieving our objective. With the help of digital technology GFS is able to create interest towards a course by sharing relevant information and providing proactive support beyond working hours and also witnessing an overall improvement in results. The difficulties that we are facing in this process and the way to overcome such challenges are also mentioned as a part of the study.
{"title":"Significance of Digital Technologies in Teaching and Learning: A Case Study on Finishing School, Griet","authors":"V. Devi, Y. Vijayalata, N. Raju, J. N. Murthy, J. Praveen, K. V. S. Raju","doi":"10.2139/ssrn.3377600","DOIUrl":"https://doi.org/10.2139/ssrn.3377600","url":null,"abstract":"Digital technologies in teaching and learning encourage active learning, knowledge construction and exploration and also allow information sharing between teachers and/ or learners at same/different physical locations. GRIET FINISHING SCHOOL(GFS) is unique initiative training program with the motivation that all students with variety of backgrounds like rural/urban, medium of instruction, societal and culture forms will complete their course as per their respective academic calendar and be ready to take up the careers of their choice. The knowledge transformation through digital technology is playing a vital role in achieving our objective. With the help of digital technology GFS is able to create interest towards a course by sharing relevant information and providing proactive support beyond working hours and also witnessing an overall improvement in results. The difficulties that we are facing in this process and the way to overcome such challenges are also mentioned as a part of the study.","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117294564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reading a scientific article is a complex task. The worst way to approach this task is to treat it like the reading of a textbook-reading from title to literature cited, digesting every word along the way without any reflection or criticism. Rather, you should begin by skimming the article to identify its structure and features. As you read, look for the authors main points. Generate questions before, during, and after reading. Draw inferences based on your own experiences and knowledge. And to really improve understanding and recall, take notes as you read. This handout discusses each of these strategies in more detail.
{"title":"Best Approach to Read a Scientific Article","authors":"Ajit Singh","doi":"10.2139/ssrn.3372784","DOIUrl":"https://doi.org/10.2139/ssrn.3372784","url":null,"abstract":"Reading a scientific article is a complex task. The worst way to approach this task is to treat it like the reading of a textbook-reading from title to literature cited, digesting every word along the way without any reflection or criticism. Rather, you should begin by skimming the article to identify its structure and features. As you read, look for the authors main points. Generate questions before, during, and after reading. Draw inferences based on your own experiences and knowledge. And to really improve understanding and recall, take notes as you read. This handout discusses each of these strategies in more detail.","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114184806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yufan Zhao, Yuichiro Koizumi, K. Aoyagi, Daixiu Wei, K. Yamanaka, A. Chiba
Grain morphology, size, and growth direction are crucial in determining the performances of metallic implant components. Understanding the effects of the manufacturing characteristics of powder bed fusion with an electron beam (PBF-EB), an additive manufacturing process, on microstructure formation and anisotropy development during solidification is essential to achieve flexible microstructure control. In this study, PBF-EB was employed to fabricate a Co-Cr-Mo alloy and the grain morphology and texture formation with different process parameters were analyzed by experimental characterization with the aid of computational thermal-fluid dynamics simulations. It was found that the epitaxial growth with resulting columnar grain and near-cubic texture tended to be dominant in the solidification process, due to competitive grain growth and the heat flow characteristics in the snake-scanning strategy. However, the molten pool connection between adjacent melt tracks resulted in the random orientation of <001> in the horizontal plane, producing a fiber-like texture. In addition, nucleation and new grain growth rather than extensive epitaxial growth could be achieved by manipulating the molten pool geometry and overlap between adjacent melt tracks. Increasing the slope of the solid/liquid interface of the molten pool and decreasing the remelting fraction of adjacent melt tracks favored the formation of new grains with random orientations to restrict the extensive epitaxial growth of the columnar grains and attenuate the microstructural anisotropy.
{"title":"Grain Morphology and Texture Development in a Co-Cr-Mo Alloy Fabricated by Powder Bed Fusion with an Electron Beam","authors":"Yufan Zhao, Yuichiro Koizumi, K. Aoyagi, Daixiu Wei, K. Yamanaka, A. Chiba","doi":"10.2139/ssrn.3358846","DOIUrl":"https://doi.org/10.2139/ssrn.3358846","url":null,"abstract":"Grain morphology, size, and growth direction are crucial in determining the performances of metallic implant components. Understanding the effects of the manufacturing characteristics of powder bed fusion with an electron beam (PBF-EB), an additive manufacturing process, on microstructure formation and anisotropy development during solidification is essential to achieve flexible microstructure control. In this study, PBF-EB was employed to fabricate a Co-Cr-Mo alloy and the grain morphology and texture formation with different process parameters were analyzed by experimental characterization with the aid of computational thermal-fluid dynamics simulations. It was found that the epitaxial growth with resulting columnar grain and near-cubic texture tended to be dominant in the solidification process, due to competitive grain growth and the heat flow characteristics in the snake-scanning strategy. However, the molten pool connection between adjacent melt tracks resulted in the random orientation of <001> in the horizontal plane, producing a fiber-like texture. In addition, nucleation and new grain growth rather than extensive epitaxial growth could be achieved by manipulating the molten pool geometry and overlap between adjacent melt tracks. Increasing the slope of the solid/liquid interface of the molten pool and decreasing the remelting fraction of adjacent melt tracks favored the formation of new grains with random orientations to restrict the extensive epitaxial growth of the columnar grains and attenuate the microstructural anisotropy.","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117261648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A shell less culture system for chick embryo could be used to produce a clever battery or bio-computer. In this system, after 50 hourses after incubatating, a heart is emerged which send blood molecules to each side and produces a biological current. This current carries charged particles and molecules and creates an electrical current and differences potential between center of heart and sides of shell-less vessels. If we put two metal bars in center and side of vessel, we can take electrical current and use of it industry. This causes that shell-less culture system plays the role of battery. This battery is clever and by closing another shell less culture system produce different currents. This is because that a collections of neurons are emerged on the heart in shell less cuture system which plays the role of a little brain. This little brain exchange information with medium and control voluntary actions of system For this reason, this system not only has the role of battery but also could be used as a bio-computer.
{"title":"Clever Battery- Bio-Computer and Little Brain in Shell-Less Culture Systems of Chick Embryos","authors":"A. Sepehri","doi":"10.2139/ssrn.3352433","DOIUrl":"https://doi.org/10.2139/ssrn.3352433","url":null,"abstract":"A shell less culture system for chick embryo could be used to produce a clever battery or bio-computer. In this system, after 50 hourses after incubatating, a heart is emerged which send blood molecules to each side and produces a biological current. This current carries charged particles and molecules and creates an electrical current and differences potential between center of heart and sides of shell-less vessels. If we put two metal bars in center and side of vessel, we can take electrical current and use of it industry. This causes that shell-less culture system plays the role of battery. This battery is clever and by closing another shell less culture system produce different currents. This is because that a collections of neurons are emerged on the heart in shell less cuture system which plays the role of a little brain. This little brain exchange information with medium and control voluntary actions of system For this reason, this system not only has the role of battery but also could be used as a bio-computer.","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131364923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Now a days new web application tools generated day by day so the security of web is most important. From the few years back the web attacks was increasing so it is a big problem. But now various scanner vulnerability tools are available so we can find out the attack if it is any in the web application if we aware the attack then able to find the solution of the problem and protect them from the attackers. With the help of tools we can find the type of vulnerability is occur mostly SQL-injection attack and cross site scripting attacks are possible in the web application.
{"title":"Cross Site Scripting (XSS) and SQL-Injection Attack Detection in Web Application","authors":"Prakhar Tripathi, Rahul Thingla","doi":"10.2139/ssrn.3356292","DOIUrl":"https://doi.org/10.2139/ssrn.3356292","url":null,"abstract":"Now a days new web application tools generated day by day so the security of web is most important. From the few years back the web attacks was increasing so it is a big problem. But now various scanner vulnerability tools are available so we can find out the attack if it is any in the web application if we aware the attack then able to find the solution of the problem and protect them from the attackers. With the help of tools we can find the type of vulnerability is occur mostly SQL-injection attack and cross site scripting attacks are possible in the web application.","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117231497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The modern regulatory state is a creature of 20th century politics, and the New Deal consensus that dominated thinking about the relationship between government regulation and the market for most of that century. That regime exists now in a very different political environment, one in which parties and voters are more ideologically polarized and digitally connected than at any time in the modern regulatory era. This article examines the influence of this new politics on one such 20th century regulatory system -- the regulation of energy market entry -- through the lens of nongovernmental organizations (NGOs) that participate in energy infrastructure siting conflicts. The analysis is built around a data set comprising information about more than 400 nongovernmental organizations (NGOs) whose missions include active opposition to one or more of nine different types of energy projects between 2000 and 2017, including various types of fossil fuel infrastructure, renewable energy facilities, and smart grid technology. The focus is on the tactics each NGO uses to oppose energy projects, and the issue arguments advanced by each NGO to oppose those projects. The results are consistent with the notion that ideological polarization and digital communication are affecting the nature of siting conflicts over energy infrastructure. NGOs devote the lion’s share of their efforts not to inside strategies like formal lobbying, but rather to mobilizing the broader public to lobby decision-makers, and organize those mobilization efforts focus overwhelmingly around environmental and health risk issues. This holds true not only for dirty energy projects like coal-fired power plants whose health and environmental risks are well-known; but for clean energy projects like wind farms as well. From NGOs’ point of view, this form of mass mobilization is efficient: digital communication tools enable NGOs to transmit messages almost costlessly, and to target audiences that are particularly receptive to their messaging. NGOs may prefer risk-based appeals because they resonate. We find that local NGOs in particular tend to make more hyperbolic risk claims than national NGOs. If local NGOs need to build a broader base of support for their cause in order to improve the probability of victory, this approach is rational. The article explores some of the implications of this increasingly fraught regulatory environment. To be sure, the regulatory process grants agencies plenty of autonomy, and regulators continue to be responsible for balancing energy security, affordability and environmental performance concerns in making siting decisions. However, the new politics of energy market entry holds out the possibility that the use of sophisticated digital communication tools to exploit risk perception biases (to more effectively amplify perceived risk) could slow efforts to green the energy supply and produce siting decisions that have other economically and environmentally counterpro
{"title":"The New Politics of (Energy) Market Entry","authors":"D. Spence","doi":"10.2139/ssrn.3337957","DOIUrl":"https://doi.org/10.2139/ssrn.3337957","url":null,"abstract":"The modern regulatory state is a creature of 20th century politics, and the New Deal consensus that dominated thinking about the relationship between government regulation and the market for most of that century. That regime exists now in a very different political environment, one in which parties and voters are more ideologically polarized and digitally connected than at any time in the modern regulatory era. This article examines the influence of this new politics on one such 20th century regulatory system -- the regulation of energy market entry -- through the lens of nongovernmental organizations (NGOs) that participate in energy infrastructure siting conflicts. The analysis is built around a data set comprising information about more than 400 nongovernmental organizations (NGOs) whose missions include active opposition to one or more of nine different types of energy projects between 2000 and 2017, including various types of fossil fuel infrastructure, renewable energy facilities, and smart grid technology. The focus is on the tactics each NGO uses to oppose energy projects, and the issue arguments advanced by each NGO to oppose those projects. The results are consistent with the notion that ideological polarization and digital communication are affecting the nature of siting conflicts over energy infrastructure. NGOs devote the lion’s share of their efforts not to inside strategies like formal lobbying, but rather to mobilizing the broader public to lobby decision-makers, and organize those mobilization efforts focus overwhelmingly around environmental and health risk issues. This holds true not only for dirty energy projects like coal-fired power plants whose health and environmental risks are well-known; but for clean energy projects like wind farms as well. \u0000 \u0000From NGOs’ point of view, this form of mass mobilization is efficient: digital communication tools enable NGOs to transmit messages almost costlessly, and to target audiences that are particularly receptive to their messaging. NGOs may prefer risk-based appeals because they resonate. We find that local NGOs in particular tend to make more hyperbolic risk claims than national NGOs. If local NGOs need to build a broader base of support for their cause in order to improve the probability of victory, this approach is rational. The article explores some of the implications of this increasingly fraught regulatory environment. To be sure, the regulatory process grants agencies plenty of autonomy, and regulators continue to be responsible for balancing energy security, affordability and environmental performance concerns in making siting decisions. However, the new politics of energy market entry holds out the possibility that the use of sophisticated digital communication tools to exploit risk perception biases (to more effectively amplify perceived risk) could slow efforts to green the energy supply and produce siting decisions that have other economically and environmentally counterpro","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133548319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shortage of bikes and docks is a common issue in bike sharing systems. To tackle this problem, operators use a fleet of vehicles to redistribute bikes across the network. We propose a model that captures successful user trips in the system, and a new mixed integer programming formulation that solves the dynamic redistribution problem by producing routes and pick-up/drop-off decisions for the vehicles. In order to scale to large instances, we develop a decomposition method based on proper station grouping, accompanied by an optimization with partial information approach, where relevant information for each group (routing and redistribution options) is modeled using piecewise linear concave functions and explicitly included in the model. We test our methods on both synthetic and real-world data, and show that our algorithms can scale to large real-world systems, with short running times that allow for real-time information to be taken into account. Furthermore, since accurate estimation of user demand is essential for efficient redistribution, we also develop data-driven and optimization-based approaches to consider lost and shifted demand. Our methods are general and not tied to the specific application domain; for instance, the optimization with partial information can be applied to any pick-up and delivery vehicle routing problem.
{"title":"Dynamic Resource Redistribution and Demand Estimation: An Application to Bike Sharing Systems","authors":"Konstantina Mellou, Patrick Jaillet","doi":"10.2139/ssrn.3336416","DOIUrl":"https://doi.org/10.2139/ssrn.3336416","url":null,"abstract":"Shortage of bikes and docks is a common issue in bike sharing systems. To tackle this problem, operators use a fleet of vehicles to redistribute bikes across the network. We propose a model that captures successful user trips in the system, and a new mixed integer programming formulation that solves the dynamic redistribution problem by producing routes and pick-up/drop-off decisions for the vehicles. In order to scale to large instances, we develop a decomposition method based on proper station grouping, accompanied by an optimization with partial information approach, where relevant information for each group (routing and redistribution options) is modeled using piecewise linear concave functions and explicitly included in the model. We test our methods on both synthetic and real-world data, and show that our algorithms can scale to large real-world systems, with short running times that allow for real-time information to be taken into account. Furthermore, since accurate estimation of user demand is essential for efficient redistribution, we also develop data-driven and optimization-based approaches to consider lost and shifted demand. Our methods are general and not tied to the specific application domain; for instance, the optimization with partial information can be applied to any pick-up and delivery vehicle routing problem.<br>","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128863807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
3D sparse matrices play significant role in many modern information retrieval methods. A huge number of computations with such matrices are performed by these methods, like clustering, latent semantic indexing. Since many of the elements in such matrices contain zeroes, thus a need to save space arises, either in memory or disk. Thus their storage in memory or disk should be very carefully designed. To save the space in memory or disk, efficient storage of elements and their retrieval is required. This paper explains two types of 3D sparse matrices known as lower triangular and upper triangular. The basic concept behind this paper is to calculate the formulas for accessing the address of elements of 3D sparse matrices in 1D array using row major and column major.
{"title":"Addressing Formulas for Elements of 3D Sparse Matrices in 1D Arrays","authors":"Ashish Pandey, Stuti Pandey","doi":"10.2139/ssrn.3328293","DOIUrl":"https://doi.org/10.2139/ssrn.3328293","url":null,"abstract":"3D sparse matrices play significant role in many modern information retrieval methods. A huge number of computations with such matrices are performed by these methods, like clustering, latent semantic indexing. Since many of the elements in such matrices contain zeroes, thus a need to save space arises, either in memory or disk. Thus their storage in memory or disk should be very carefully designed. To save the space in memory or disk, efficient storage of elements and their retrieval is required. This paper explains two types of 3D sparse matrices known as lower triangular and upper triangular. The basic concept behind this paper is to calculate the formulas for accessing the address of elements of 3D sparse matrices in 1D array using row major and column major.","PeriodicalId":220342,"journal":{"name":"Materials Science Educator: Courses","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127336384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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