Engineering physics of superconducting hot-electron bolometer mixers

Superconducting hot-electron bolometers are presently the best performing mixing devices for the frequency range beyond 1.2 THz, where good quality superconductor-insulator-superconductor (SIS) devices do not exist. Their physical appearance is very simple: an antenna consisting of a normal metal, sometimes a normal metal-superconductor bilayer, connected to a thin film of a narrow, short superconductor with a high resistivity in the normal state. The device is brought into an optimal operating regime by applying a dc current and a certain amount of local- oscillator power. Despite this technological simplicity its operation has been found to be controlled by many different aspects of superconductivity, all occurring simultaneously. A core ingredient is the understanding that there are two sources of resistance in a superconductor: a charge conversion resistance occurring at an normal-metal-superconductor interface and a resistance due to time- dependent changes of the superconducting phase. The latter is responsible for the actual mixing process in a non-uniform superconducting environment set up by the bias-conditions and the geometry. The present understanding indicates that further improvement needs to be found in the use of other materials with a faster energy-relaxation rate. Meanwhile several empirical parameters have become physically meaningful indicators of the devices, which will facilitate the technological developments.Comment: This is an author-processed copy of an Invited contribution to the Special Issue of the IEEE Transactions on Terahertz Science and Technology dedicated to the 28th IEEE International Symposium on Space Terahertz Technology (ISSTT2017

Computer program draws three-dimensional surfaces

Computer plotting program PLOT 3D draws views of surface forms z = f(x,y). Surface thus defined by program may be drawn after arbitrary rotations. Program portrays behavior of various functions involving two variables in many engineering, physics, and mathematical relationships

Engineering Physics II

Exam paper (Supplementary) for second semester National Diploma, Chemical Engineerin

Conference Committee

Honorary CommitteProf. Ir. Joni Hermana, M.Sc.Es, Ph.D,                                    Rector of Institut Teknologi SepuluhNopember Surabaya (ITS)General ChairmanProf. Dr. Ir. Adi Soeprijanto, M.T.,                                            Director of PostgraduateProgramme ITSSteering CommitteeProf. Dr. Ir. Sekartedjo Koentjoro,                                          Department of Engineering Physics,ITS (Chair)Prof. Ir. Priyo Suprobo, M.S., Ph.D.,                                        Department of Civil Engineering, ITSProf. Ir. Ontoseno Penangsang, M.Sc., Ph.D.,                       Department of ElectricalEngineering, ITSProf. Ir. Eddy Yahya, M.Sc., Ph.D.,                                           Department of Physics, ITSProf. Dr. Ir. Happy Ratna Santosa, M.Sc.,                              Department of Architecture, ITSProf. Ir. Renanto Handogo, M.S., Ph.D.,                                  Department of ChemicalEngineering, ITSProf. Dr. Ir. Bangun Muljo Sukojo, DEA, DESS,                  Department of GeomaticsEngineering, ITSProf. Ir. Eko Budi Djatmiko, M.Sc., Ph.D.,                             Department of Ocean Engineering,ITSProf. Ir. Arif Djunaidy, M.Sc., Ph.D.,                                        Department of Information System,ITSProf. Dr. Yulinah Trihadiningrum, M.App.Sc,                     Department of EnvironmentalEngineering, ITSProf. Dr. Udi Subakti Ciptomulyono, M.Eng.Sc.,                Department of IndustrialEngineering, ITSProf. Ir. IK Aria Pria Utama, M.Sc., Ph.D.,                             Department of Naval Architecture,ITSProf. Dr. Ketut Buda Artana, S.T., M.Sc.,                                Department of Marine Engineering,ITSProf. Drs. Mardi Santoso, Ph.D.,                                                Department of Chemistry, ITSProf. Ir. Sutardi, M.Eng., Ph.D.,                                                  Department of MechanicalEngineering, ITSProf. Ir. I Nyoman Pujawan, M.Eng, Ph.D.,                          Department of IndustrialEngineering, ITSProf. Ir. Joko Lianto Buliali, M.Sc., Ph.D.,                              Department of InformaticsEngineering, ITSDr. Subchan, S.Si, M.Sc.,                                                                Department of Mathematics, ITSDr.rer.nat. Ir. Maya Shovitri, M.Si,                                           Department of Biology, ITSDr. Sungging Pintowantoro, S.T., M.T.,                                  Department of Material andMetallurgical Engineering, ITSDr. Imam Baihaqi, S.T., M.Sc.,                                                    Department of IndustrialEngineering, ITSDr.rer.pol. Heri Kuswanto, S.Si., M.Si.,                                    Department of Statistics, ITSScientific Committee:Dr.rer.nat Aulia MT Nasution.,                                                  Department of Engineering Physics,ITS (Chair)Prof. J.C. Liu,                                                                                      NTUST TaiwanRozalina binti Zakaria, PhD.,                                                      University of MalayaDr. Iwan Halim Sahputra.,                                                           Texas A&M Univ. at QatarProf. Heru Setyawan.,                                                                   Department of ChemicalEngineering, ITSDr. Totok Soehartanto, DEA,                                                     Department of Engineering Physics,ITSDr. Suhartono,                                                                                  Department of Statistics, ITSDr. Subiono,                                                                                       Department of Mathematics, ITSDr. Djoko Purwanto,                                                                     Department of ElectricalEngineering, ITSDr. Harus Laksana Guntur,                                                          Department of MechanicalEngineering, ITSDr. Nani Kurniati,                                                                            Department of IndustrialEngineering, ITSDr. Eng. Hosta Ardhyananta, S.T., M.Sc.,                                Department of Material andMetallurgical Engineering, ITSDr. Dyah Susanti,                                                                             Department of Material andMetallurgical Engineering, ITSDr. Murni Rachmawati,                                                                Department of Architecture, ITSEndah Wahyuni, PhD.,                                                                  Department of CivilEngineering, ITSDr. –Ing Teguh Harijanto,                                                            Department of GeomaticsEngineering, ITSDr. Eng. Rudi Walujo Pratianto,                                               Department of Ocean Engineering,ITSWaskitho Wibisono, PhD.,                                                          Department of InformaticsEngineering, ITSDr. Apol Pribadi Subriadi,                                                           Department of Informatics System,ITSDr. Mat Syaiin,                                                                                  Shipbuilding Institute of PolytechnicSurabayaDr. Ali Musyafa’,                                                                              Department of Engineering Physics,ITSDr. Ridho Hantoro,                                                                         Department of Engineering Physics,ITSOrganizing Committee :Dr. Ir. Aulia Siti Aisjah, M.T.,                                                       Department of Engineering Physics,ITS (Chair)Dr. Ir. Ria Asih Aryani Soemitro, M.Eng,                               Department of Civil Engineering, ITSAgus Muhammad Hatta, S.T., M.Si., Ph.D.,                            Department of Engineering Physics,ITSDetak Yan Pratama, S.T., M.Sc.,                                                 Department of Engineering Physics,ITSDr. Dhany Arifianto, S.T., M.Eng.,                                             Department of Engineering Physics,ITSDr.-Ing. Doty Dewi Risanti, S.T., M.T.,                                    Department of Engineering Physics,ITSGunawan Nugroho, S.T., M.T., Ph.D.,                                       Department of Engineering Physics,ITSDr. Purwadi Agus Darwito, S.T., M.Sc.,                                  Department of Engineering Physics,ITSTotok Ruki Biyanto, S.T., M.T., Ph.D.,                                     Department of Engineering Physics,ITSDyah Sawitri, S.T., M.T.,                                                                Department of Engineering Physics,ITSBagus Tri Atmaja, S.T., M.T.,                                                       Department of Engineering Physics,ITSArief Abdurrakhman, S.T., M.T.,                                               Department of Engineering Physics,ITSLizda Johar Mawarani, S.T., M.T.,                                             Department of Engineering Physics,ITSWahyu, SSi, MT.,                                                                              Department of ChemicalEngineering, ITSNur Endah Nuffida, ST, MT.,                                                       Department of Architecture, ITSIpung Fitri Purwanti, ST, MT.,                                                   Department of EnvironmentalEngineering, IT

The Energy Conversion Playground (ECP) Design Task: Assessing How Students Think About Technical and Non-technical Considerations in Sustainable Community Development

Students in global service-learning and similar programs frequently encounter substantial social, cultural, political, and ethical differences when working with project partners in different countries and regions. Neglecting such differences can lead to project failures and/or disempowered communities. In response to these challenges, educational resources have been developed to teach students to think about how the people, social structures, and other contextual factors associated with projects can affect, and be affected by, students’ designs. Yet, there remains a scarcity of valid and reliable instruments to evaluate the effectiveness of such interventions. The purpose of this study is create a theoretically and empirically grounded instrument, the Energy Conversion Playground (ECP) design task, that is able to provide a meaningful and robust assessment of an individual’s ability to identify salient technical and non-technical considerations when approaching an engineering design task situated in a developing country context. We present the scenario and an accompanying rubric that was first developed inductively from student responses to the scenario (specifically 449 discrete items from 93 ECP design tasks submitted by students who attended a Global Engineering Design Symposium). Further development of the rubric involved deductive grounding in relevant literature. To demonstrate the sensitivity of ECP design task to changes in students’ thinking, we also performed comparative analysis of responses from a subset of the students (n=37) who completed the same instrument both before and after participating in the GEDS

Unpacking Professional Shame: Patterns of White Male Engineering Students Living in and out of Threats to their Identities

Background Although prior research has provided robust descriptions of engineering students\u27 identity development, a gap in the literature exists related to students\u27 emotional experiences of shame, which undergird the socially constructed expectations of their professional formation. Purpose We examined the lived experiences of professional shame among White male engineering students in the United States. We conceptualize professional shame to be a painful emotional state that occurs when one perceives they have failed to meet socially constructed expectations or standards that are relevant to their identity in a professional domain. Method We conducted unstructured interviews with nine White male engineering students from both a research‐focused institution and a teaching‐focused institution. We used interpretative phenomenological analysis to examine the interview transcripts. Results The findings demonstrated four themes related to how participants experienced professional shame. First, they negotiated their global, or holistic, identities in the engineering domain. Second, they experienced threats to their identities within professional contexts. Third, participants responded to threats in ways that gave prominence to the standards they perceived themselves to have failed. Finally, they repaired their identities through reframing shame experiences and seeking social connection. Conclusions The findings demonstrate that the professional shame phenomenon is interwoven with professional identity development. In experiencing professional shame, White male students might reproduce the shame experience for themselves and others. This finding has important implications for the standards against which members from underrepresented groups may compare themselves and provides insight into the social construction of engineering cultures by dominant groups