Outgoing editor-in-chief Francis Sullivan weighs the debate between good and bad science, while also signing off as EIC and welcoming aboard Norman Chonacky.
{"title":"From the Editors: Good, Bad, or Indifferent?","authors":"F. Sullivan","doi":"10.1109/MCSE.2004.67","DOIUrl":"https://doi.org/10.1109/MCSE.2004.67","url":null,"abstract":"Outgoing editor-in-chief Francis Sullivan weighs the debate between good and bad science, while also signing off as EIC and welcoming aboard Norman Chonacky.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"17 1","pages":"3-3"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80121955","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. Calder, J. Dursi, B. Fryxell, T. Plewa, G. Weirs, Todd Dupont, H. Robey, J. Kane, P. Drake, B. Remington, G. Dimonte, J. Hayes, J. Stone, P. Ricker, F. Timmes, M. Zingale, K. Olson
Astrophysical simulations model phenomena that can't be fully reproduced terrestrially. Validation then requires carefully devising feasible experiments with the relevant physics. The authors describe validating simulations against experiments that probe fluid instabilities, nuclear burning, and radiation transport, and then discuss insights from - and the limitations of - these tests.
{"title":"Validating astrophysical simulation codes","authors":"A. Calder, J. Dursi, B. Fryxell, T. Plewa, G. Weirs, Todd Dupont, H. Robey, J. Kane, P. Drake, B. Remington, G. Dimonte, J. Hayes, J. Stone, P. Ricker, F. Timmes, M. Zingale, K. Olson","doi":"10.1109/MCSE.2004.44","DOIUrl":"https://doi.org/10.1109/MCSE.2004.44","url":null,"abstract":"Astrophysical simulations model phenomena that can't be fully reproduced terrestrially. Validation then requires carefully devising feasible experiments with the relevant physics. The authors describe validating simulations against experiments that probe fluid instabilities, nuclear burning, and radiation transport, and then discuss insights from - and the limitations of - these tests.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"19 1","pages":"10-20"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72713626","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}
{"title":"In Response to a Recent Book Review","authors":"J. Ferrero","doi":"10.1109/MCSE.2004.14","DOIUrl":"https://doi.org/10.1109/MCSE.2004.14","url":null,"abstract":"","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"22 1","pages":"3-5"},"PeriodicalIF":0.0,"publicationDate":"2004-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81264417","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}
{"title":"The Legacy of Alan Turing: Alan Turing: Life and Legacy of a Great Thinker","authors":"P. Love","doi":"10.1109/MCSE.2004.4","DOIUrl":"https://doi.org/10.1109/MCSE.2004.4","url":null,"abstract":"Alan Turing: Life and Legacy of a Great Thinker, Christof Teuscher (ed.), Springer Verlag, 2004, US$69.95.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"20 1","pages":"97-99"},"PeriodicalIF":0.0,"publicationDate":"2004-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83348662","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}
When and if the statement in the title is proved, the person who proves it will win a million dollars and become an instant megastar. He or she will certainly appear on the front page of The New York Times and should expect invitations from late-night talk shows and to be the subject of a PBS Nova special. For a long timea very long timethis fundamental open question about the relationship between P and NP has been the large white hippo blocking the main hallway of the Academy of Complexity Theory.
如果标题中的说法被证实，证明它的人将赢得一百万美元，并立即成为超级巨星。他或她肯定会出现在《纽约时报》(New York Times)的头版上，应该会受到深夜脱口秀节目的邀请，并成为PBS Nova特别节目的主题。很长一段时间以来——很长一段时间以来——这个关于P和NP之间关系的基本开放问题一直是阻塞复杂性理论学院主要走廊的巨大的白色河马。
{"title":"From the Editors: P ≠ NP","authors":"F. Sullivan","doi":"10.1109/MCSE.2004.8","DOIUrl":"https://doi.org/10.1109/MCSE.2004.8","url":null,"abstract":"When and if the statement in the title is proved, the person who proves it will win a million dollars and become an instant megastar. He or she will certainly appear on the front page of The New York Times and should expect invitations from late-night talk shows and to be the subject of a PBS Nova special. For a long timea very long timethis fundamental open question about the relationship between P and NP has been the large white hippo blocking the main hallway of the Academy of Complexity Theory.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"11 1","pages":"2-2"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78827130","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 magnetic field intensity of most celestial bodies and regions of the universe are known; they range from 10/sup -9/ G in the intergalactic plasma to 10/sup 12/ G at the surface of neutron stars. The approach most researchers use to understand this dynamo mechanism is to consider a cosmic plasma with a stationary motion, which leads to an induction problem where the goal is to find stationary states as solutions of the induction equation. This kind of equation is easily solved via a computer. By choosing convective velocity fields, we can simulate convection cells, which in turn help us understand the behavior of the photosphere, the chromosphere, the Sun's convective zone, and laboratory plasmas. We can also investigate the not-well-understood phenomena of reconnection in this way. The PCell program helps visualize the magnetic field's evolution in different convective plasmas. We wrote the program in C (part of the program was translated from Fortran to C); it runs on Linux or Unix.
{"title":"PCell: a 2D program for visualizing convective plasma cells","authors":"R. Carboni, F. Frutos-Alfaro","doi":"10.1109/MCSE.2004.18","DOIUrl":"https://doi.org/10.1109/MCSE.2004.18","url":null,"abstract":"The magnetic field intensity of most celestial bodies and regions of the universe are known; they range from 10/sup -9/ G in the intergalactic plasma to 10/sup 12/ G at the surface of neutron stars. The approach most researchers use to understand this dynamo mechanism is to consider a cosmic plasma with a stationary motion, which leads to an induction problem where the goal is to find stationary states as solutions of the induction equation. This kind of equation is easily solved via a computer. By choosing convective velocity fields, we can simulate convection cells, which in turn help us understand the behavior of the photosphere, the chromosphere, the Sun's convective zone, and laboratory plasmas. We can also investigate the not-well-understood phenomena of reconnection in this way. The PCell program helps visualize the magnetic field's evolution in different convective plasmas. We wrote the program in C (part of the program was translated from Fortran to C); it runs on Linux or Unix.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"40 1","pages":"101-104"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80732285","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}
{"title":"Simulated Bite Marks","authors":"Pam Frost Garder","doi":"10.1109/MCSE.2004.50","DOIUrl":"https://doi.org/10.1109/MCSE.2004.50","url":null,"abstract":"","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"34 1","pages":"4-6"},"PeriodicalIF":0.0,"publicationDate":"2004-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78536230","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}
In this article, I'll review Stella's modeling capabilities for both research and instruction. I'll describe the basic modeling tools using my student's quest as a simple, illustrative case study, exploring how these tools contribute to speed and efficiency in creating models for concept testing. I will also examine some of Stella's broader research capabilities in the context of how they support and connect with more specific and scalable modeling systems implemented in high-end systems. Finally, I will comment on Stella's range of educational applications.
{"title":"Stella: Growing Upward, Downward, and Outward","authors":"N. Chonacky","doi":"10.1109/MCSE.2004.79","DOIUrl":"https://doi.org/10.1109/MCSE.2004.79","url":null,"abstract":"In this article, I'll review Stella's modeling capabilities for both research and instruction. I'll describe the basic modeling tools using my student's quest as a simple, illustrative case study, exploring how these tools contribute to speed and efficiency in creating models for concept testing. I will also examine some of Stella's broader research capabilities in the context of how they support and connect with more specific and scalable modeling systems implemented in high-end systems. Finally, I will comment on Stella's range of educational applications.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"6 1","pages":"8-15"},"PeriodicalIF":0.0,"publicationDate":"2004-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89074188","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}
Every now and then, a peculiar kind of news story appears about some scientific topic. On first reading, it looks like "startling new results or "the answer to everything about some perpetually hot topic, such as the age of the universe, the origin of mankind, or the best diet for a healthy life. One characteristic all these examples share is that they fade quickly, only to be replaced by a new ultimate answer. Sometimes rather than fading, the thrilling discovery has a second life in checkout line tabloids. A few of these items are hoaxes, some are merely consequences of over-enthusiasm about preliminary results, but many are honest mistakes carried to the point of pathology.
{"title":"From the Editors: Computational Science and Pathological Science","authors":"F. Sullivan","doi":"10.1109/MCSE.2004.47","DOIUrl":"https://doi.org/10.1109/MCSE.2004.47","url":null,"abstract":"Every now and then, a peculiar kind of news story appears about some scientific topic. On first reading, it looks like \"startling new results or \"the answer to everything about some perpetually hot topic, such as the age of the universe, the origin of mankind, or the best diet for a healthy life. One characteristic all these examples share is that they fade quickly, only to be replaced by a new ultimate answer. Sometimes rather than fading, the thrilling discovery has a second life in checkout line tabloids. A few of these items are hoaxes, some are merely consequences of over-enthusiasm about preliminary results, but many are honest mistakes carried to the point of pathology.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"87 1","pages":"2-3"},"PeriodicalIF":0.0,"publicationDate":"2004-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84040904","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}
In this second of two issues devoted to the frontiers of simulation, we feature four articles that illustrate the diversity of computational applications of complex physical phenomena. A major challenge for computational simulations is how to accurately calculate the effects of interacting phenomena, especially when such phenomena evolve with different time and distance scales and have very different properties. When time scales for coupling different effects are long compared with those that determine each effect's evolution separately then the system is "loosely coupled." It is then possible to couple several existing calculations together through an interface and obtain accurate answers.
{"title":"Guest Editor's Introduction: Frontiers of Simulation, Part II","authors":"D. Post","doi":"10.1109/MCSE.2004.48","DOIUrl":"https://doi.org/10.1109/MCSE.2004.48","url":null,"abstract":"In this second of two issues devoted to the frontiers of simulation, we feature four articles that illustrate the diversity of computational applications of complex physical phenomena. A major challenge for computational simulations is how to accurately calculate the effects of interacting phenomena, especially when such phenomena evolve with different time and distance scales and have very different properties. When time scales for coupling different effects are long compared with those that determine each effect's evolution separately then the system is \"loosely coupled.\" It is then possible to couple several existing calculations together through an interface and obtain accurate answers.","PeriodicalId":100659,"journal":{"name":"IMPACT of Computing in Science and Engineering","volume":"47 1","pages":"16-17"},"PeriodicalIF":0.0,"publicationDate":"2004-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90353446","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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