196,312 research outputs found
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Ohmic contact properties of magnetron sputtered Ti3SiC2 on n- and p-type 4H-silicon carbide
No full textEpitaxial Ti3SiC2 (0001) thin film contacts were grown on doped 4H-SiC (0001) using magnetron sputtering in an ultra high vacuum system. The specific contact resistance was investigated using linear transmission line measurements. Rapid thermal annealing at 950 degrees C for 1 min of as-deposited films yielded ohmic contacts to n-type SiC with contact resistances in the order of 10(-4) Omega cm(2). Transmission electron microscopy shows that the interface between Ti3SiC2 and n-type SiC is atomically sharp with evidence of interfacial ordering after annealing.Original Publication: Kristina Buchholt, R Ghandi, M Domeij, C-M Zetterling, Jun Lu, Per Eklund, Lars Hultman and Anita Lloyd Spetz, Ohmic contact properties of magnetron sputtered Ti3SiC2 on n- and p-type 4H-silicon carbide, 2011, APPLIED PHYSICS LETTERS, (98), 4, 042108. http://dx.doi.org/10.1063/1.3549198 Copyright: American Institute of Physics http://www.aip.org/</p
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
A human SP-C promoter fragment targets alpha 1-proteinase inhibitor gene expression to lung alveolar type II cells in transgenic mice
No full textA 1.277 kb promoter fragment of the gene encoding one of the lung surfactant proteins, SP-C, was cloned from a human genomic library and characterized using the human alpha 1-proteinase inhibitor (alpha 1PI) gene as reporter. Messenger RNA for human alpha 1PI isolated from a single transgenic mouse line was detected solely in lung tissue. Using immunogold electron microscopy, accumulation of human alpha 1PI was shown unambiguously to occur only in type II pulmonary cells and, in discrete amounts, in the alveolar lining fluid. The protein was secreted and glycosylated showing a molecular weight close to that of plasma-derived human alpha 1PI
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
RF-mikrovågssensorutveckling för cell- och människa in vitro och ex vivo-övervakning
No full textAbstractIn this research new RF/microwave-based sensor solutions were developed for the monitoring of biological cells and human beings to obtain a better understanding of their activity or state in a quick, cheap, easy and continuous way. The effect of different substances on cell behaviour can be monitored by measuring the electrical environment where changes are observed as cells react to a stimulus. The starting point of the study was a microchip with a capacitance measurement system integrated into the culturing chamber, enabling the monitoring of cell proliferation or death. The main challenge of the study was the correct interpretation of the received signals and the combination of “dry” electronics and “wet” biology, which is a difficult issue in terms of reliability and durability of the system. For this purpose, a low temperature co-fired ceramic package was developed which could withstand cell culture conditions and which did not interfere with the cell activity. A 1.1 MHz shift in resonance frequency of the system could clearly be measured, where the shift depended on the number of cells. Another topic of the research concentrated on a microwave sensor that can be utilized in the examination and analysis of fluid samples collected from the body which provide information about a person’s health status. A microwave sensor was developed, which was tested with liquid samples. Microfluidics were also integrated into the system which allowed the use of very small sample volumes and improved the usability of the device. The challenge of the work was to build the system so that the parts were integrated seamlessly without interfering with each other. The sensor concept was tested successfully using typical concentrations of NaCl found in human blood plasma i.e. 125 to 155 mmol/mol of water. The third topic of the thesis was aiming for a microwave sensor that enables real-time measurement of body fluid balance directly from the skin. The operation of the developed microwave sensor was based on a resonator whose resonance frequency reacted to the electrical properties of materials in its proximity, in this case the water content of the skin and its changes. The function of the sensor was tested with artificial skin, made in the laboratory, which corresponded to the properties of real skin. The observed changes in resonance frequency was +370 MHz and -220 MHz for dehydrated and hydrated skin compared to normal skin, thus providing a wide frequency range for detection of the status of the skin.Original papersOriginal papers are not included in the electronic version of the dissertation.Halonen, N., Kilpijärvi, J., Sobocinski, M., Datta-Chaudhuri, T., Hassinen, A., Prakash, S. B., Möller, P., Abshire, P., Kellokumpu, S., & Lloyd Spetz, A. (2016). Low temperature co-fired ceramic packaging of CMOS capacitive sensor chip towards cell viability monitoring. Beilstein Journal of Nanotechnology, 7, 1871–1877. https://doi.org/10.3762/bjnano.7.179Self-archived versionKilpijärvi, J., Halonen, N., Sobocinski, M., Hassinen, A., Senevirathna, B., Uvdal, K., Abshire, P., Smela, E., Kellokumpu, S., Juuti, J., & Lloyd Spetz, A. (2018). LTCC Packaged Ring Oscillator Based Sensor for Evaluation of Cell Proliferation. Sensors, 18(10), 3346. https://doi.org/10.3390/s18103346Self-archived versionKilpijärvi, J., Halonen, N., Juuti, J., & Hannu, J. (2019). Microfluidic Microwave Sensor for Detecting Saline in Biological Range. Sensors, 19(4), 819. https://doi.org/10.3390/s19040819Self-archived versionKilpijarvi, J., Tolvanen, J., Juuti, J., Halonen, N., & Hannu, J. (2020). A Non-Invasive Method for Hydration Status Measurement With a Microwave Sensor Using Skin Phantoms. IEEE Sensors Journal, 20(2), 1095–1104. https://doi.org/10.1109/jsen.2019.2945817Self-archived versionTiivistelmäTutkimuksessa kehitettiin uusia RF-/mikroaaltoihin perustuvia anturiratkaisuja solujen ja ihmisen mittaukseen, jotta niiden toiminnasta tai tilasta saataisiin parempi kuva nopeasti, edullisesti, helposti ja jatkuvatoimisesti. Solujen toimintaa voidaan seurata mittaamalla niiden sähköistä ympäristöä missä havaitaan muutoksia, kun solut reagoivat erilaisiin aineisiin. Tutkimuksen lähtökohtana käytettiin soluanturiksi suunniteltua mikrosirua, jossa oli viljelyalustaan integroitu kapasitanssin mittausjärjestelmä, jonka avulla voitiin monitoroida solujen jakaantumista tai kuolemista. Tutkimuksen haasteena oli saatujen signaalien oikeanlainen tulkinta sekä ”kuivan” elektroniikan ja ”märän” biologian yhdistäminen järjestelmän luotettavuuden ja kestävyyden kannalta. Tähän tarkoitukseen työssä kehitettiin matalan lämpötilan yhteissintrattavaan keraamiin perustuva pakkaus, joka kestää soluviljelyn olosuhteita eikä häiritse solujen toimintaa. Testeissä voitiin havaita selvä 1.1 MHz muutos resonanssitaajuudessa, jonka suuruus riippui solujen lukumäärästä. Tutkimuksen toinen alue oli mikroaaltoanturi, jolla voidaan tutkia ja analysoida kehosta saatavia nestemäisiä näytteitä ja saada tietoa henkilön terveydentilasta. Työssä kehitettiin mikroaaltoanturi, jota testattiin nestemäisillä näytteillä. Nestenäytteiden käsittelemiseksi systeemiin integroitiin myös mikrofluidistiikka mikä mahdollistaa hyvin pienten näytemäärien käyttämisen ja parantaa laitteen käytettävyyttä. Työn haasteena oli järjestelmän rakentaminen siten, että osat integroituvat toisiinsa saumattomasti toisiaan häiritsemättä. Anturikonsepti testattiin onnistuneesti käyttämällä tyypillistä ihmisen veriplasmasta löytyvää NaCl-pitoisuutta vaihteluvälillä 125–155 mmol/mol vedessä. Väitöstyön kolmas aihealue oli mikroaaltoanturin hyödyntäminen kehon nestetasapainon mittauksessa reaaliaikaisesti suoraan iholta. Kehitetyn mikroaaltoanturin toiminta perustui resonaattoriin, jonka resonanssitaajuus reagoi sen lähiympäristön sähköisiin ominaisuuksiin eli tässä tapauksessa ihon vesipitoisuuteen ja siinä tapahtuviin muutoksiin. Anturin toimintaa testattiin laboratoriossa valmistettujen keinoihojen avulla, jotka vastasivat ominaisuuksiltaan oikeata ihoa kuvastaen eri tilannetta kehon nestetasapainossa. Mitattu resonanssitaajuus muuttui +370 MHz ja -220 MHz kuivan ja kostean ihon välillä verrattuna normaaliin ihoon, tarjoten laajan taajuusalueen ihon tilanteen havainnointiin.OsajulkaisutOsajulkaisut eivät sisälly väitöskirjan elektroniseen versioon.Halonen, N., Kilpijärvi, J., Sobocinski, M., Datta-Chaudhuri, T., Hassinen, A., Prakash, S. B., Möller, P., Abshire, P., Kellokumpu, S., & Lloyd Spetz, A. (2016). Low temperature co-fired ceramic packaging of CMOS capacitive sensor chip towards cell viability monitoring. Beilstein Journal of Nanotechnology, 7, 1871–1877. https://doi.org/10.3762/bjnano.7.179Rinnakkaistallennettu versioKilpijärvi, J., Halonen, N., Sobocinski, M., Hassinen, A., Senevirathna, B., Uvdal, K., Abshire, P., Smela, E., Kellokumpu, S., Juuti, J., & Lloyd Spetz, A. (2018). LTCC Packaged Ring Oscillator Based Sensor for Evaluation of Cell Proliferation. Sensors, 18(10), 3346. https://doi.org/10.3390/s18103346Rinnakkaistallennettu versioKilpijärvi, J., Halonen, N., Juuti, J., & Hannu, J. (2019). Microfluidic Microwave Sensor for Detecting Saline in Biological Range. Sensors, 19(4), 819. https://doi.org/10.3390/s19040819Rinnakkaistallennettu versioKilpijarvi, J., Tolvanen, J., Juuti, J., Halonen, N., & Hannu, J. (2020). A Non-Invasive Method for Hydration Status Measurement With a Microwave Sensor Using Skin Phantoms. IEEE Sensors Journal, 20(2), 1095–1104. https://doi.org/10.1109/jsen.2019.2945817Rinnakkaistallennettu versioAbstraktI denna forskning utvecklades nya RF / mikrovågsbaserade sensorlösningar för övervakning av celler och människor för att få en bättre förståelse för deras aktivitet eller tillstånd snabbt, billigt, enkelt och kontinuerligt. Effekten av olika ämnen på beteendet hos celler kan övervakas genom att mäta deras elektriska miljö där förändringar observeras när celler reagerar på stimulanser. Utgångspunkten för studien var ett mikrochip med ett kapacitansmätsystem integrerat i odlingskammaren, vilket möjliggör övervakning av cellproliferation eller död. Utmaningen med studien var den korrekta tolkningen av de mottagna signalerna och kombinationen av ”torr” elektronik och ”våt” biologi, vilket är utmanande problemställningar som måste lösas för systemets tillförlitlighet och hållbarhet. För detta ändamål utvecklades en keramisk förpackning “tillverkad vid låg temperature” som tål cellodlingsförhållanden och inte stör cellaktiviteten. Ett tydligt skift på 1,1 MHz i systemets resonansfrekvens kunde mätas, där storlek på skiftet berodde på antalet celler. En annan del av forskningen i avhandlingen koncentrerade sig på mikrovågssensorn som kan användas vid undersökning och analys av vätskeprover, som kan samlas in från kroppen och ge information om en persons hälsotillstånd. En mikrovågssensor utvecklades som testades på flytande prover. Mikrofluidik integrerades i systemet för hanteringen av flytande prover, vilket möjliggör användning av mycket små provvolymer och förbättrar enhetens användbarhet. Utmaningen med arbetet var att bygga systemet med full integration av delarna och utan att dessa störde varandra. Sensorkonceptet testades framgångsrikt med användning av en typisk NaCl-koncentration som finns i human blodplasma, dvs. 125 till 155 mmol / mol vatten. Den tredje delen av avhandlingen syftade till en mikrovågssensor som möjliggör realtidsmätning av kroppsvätskebalansen direkt på huden. Funktionen för den utvecklade mikrovågssensorn baserades på en resonator, resonansfrekvensen beror på de elektriska egenskaperna hos material i dess närhet, i detta fall hudens vätskeinnehåll och dess förändringar. Sensorns funktion testades med konstgjord hud, som tillverkades i laboratoriet, med motsvarade egenskaper som hos riktig hud. Observerade förändringar i resonansfrekvensen var +370 MHz och -220 MHz för uttorkad och hydratiserad hud jämfört med normal hud, vilket ger ett brett frekvensområde för detektion av hudens statusAcademic dissertation to be presented with the assent of the Doctoral Training Committee of Information Technology and Electrical Engineering of the University of Oulu for public defence in Martti Ahtisaari auditorium (L2), Linnanmaa, on 22 October 2021, at 11 a.m.Abstract
In this research new RF/microwave-based sensor solutions were developed for the monitoring of biological cells and human beings to obtain a better understanding of their activity or state in a quick, cheap, easy and continuous way. The effect of different substances on cell behaviour can be monitored by measuring the electrical environment where changes are observed as cells react to a stimulus. The starting point of the study was a microchip with a capacitance measurement system integrated into the culturing chamber, enabling the monitoring of cell proliferation or death. The main challenge of the study was the correct interpretation of the received signals and the combination of “dry” electronics and “wet” biology, which is a difficult issue in terms of reliability and durability of the system. For this purpose, a low temperature co-fired ceramic package was developed which could withstand cell culture conditions and which did not interfere with the cell activity. A 1.1 MHz shift in resonance frequency of the system could clearly be measured, where the shift depended on the number of cells. Another topic of the research concentrated on a microwave sensor that can be utilized in the examination and analysis of fluid samples collected from the body which provide information about a person’s health status. A microwave sensor was developed, which was tested with liquid samples. Microfluidics were also integrated into the system which allowed the use of very small sample volumes and improved the usability of the device. The challenge of the work was to build the system so that the parts were integrated seamlessly without interfering with each other. The sensor concept was tested successfully using typical concentrations of NaCl found in human blood plasma i.e. 125 to 155 mmol/mol of water. The third topic of the thesis was aiming for a microwave sensor that enables real-time measurement of body fluid balance directly from the skin. The operation of the developed microwave sensor was based on a resonator whose resonance frequency reacted to the electrical properties of materials in its proximity, in this case the water content of the skin and its changes. The function of the sensor was tested with artificial skin, made in the laboratory, which corresponded to the properties of real skin. The observed changes in resonance frequency was +370 MHz and -220 MHz for dehydrated and hydrated skin compared to normal skin, thus providing a wide frequency range for detection of the status of the skin.Tiivistelmä
Tutkimuksessa kehitettiin uusia RF-/mikroaaltoihin perustuvia anturiratkaisuja solujen ja ihmisen mittaukseen, jotta niiden toiminnasta tai tilasta saataisiin parempi kuva nopeasti, edullisesti, helposti ja jatkuvatoimisesti. Solujen toimintaa voidaan seurata mittaamalla niiden sähköistä ympäristöä missä havaitaan muutoksia, kun solut reagoivat erilaisiin aineisiin. Tutkimuksen lähtökohtana käytettiin soluanturiksi suunniteltua mikrosirua, jossa oli viljelyalustaan integroitu kapasitanssin mittausjärjestelmä, jonka avulla voitiin monitoroida solujen jakaantumista tai kuolemista. Tutkimuksen haasteena oli saatujen signaalien oikeanlainen tulkinta sekä ”kuivan” elektroniikan ja ”märän” biologian yhdistäminen järjestelmän luotettavuuden ja kestävyyden kannalta. Tähän tarkoitukseen työssä kehitettiin matalan lämpötilan yhteissintrattavaan keraamiin perustuva pakkaus, joka kestää soluviljelyn olosuhteita eikä häiritse solujen toimintaa. Testeissä voitiin havaita selvä 1.1 MHz muutos resonanssitaajuudessa, jonka suuruus riippui solujen lukumäärästä. Tutkimuksen toinen alue oli mikroaaltoanturi, jolla voidaan tutkia ja analysoida kehosta saatavia nestemäisiä näytteitä ja saada tietoa henkilön terveydentilasta. Työssä kehitettiin mikroaaltoanturi, jota testattiin nestemäisillä näytteillä. Nestenäytteiden käsittelemiseksi systeemiin integroitiin myös mikrofluidistiikka mikä mahdollistaa hyvin pienten näytemäärien käyttämisen ja parantaa laitteen käytettävyyttä. Työn haasteena oli järjestelmän rakentaminen siten, että osat integroituvat toisiinsa saumattomasti toisiaan häiritsemättä. Anturikonsepti testattiin onnistuneesti käyttämällä tyypillistä ihmisen veriplasmasta löytyvää NaCl-pitoisuutta vaihteluvälillä 125–155 mmol/mol vedessä. Väitöstyön kolmas aihealue oli mikroaaltoanturin hyödyntäminen kehon nestetasapainon mittauksessa reaaliaikaisesti suoraan iholta. Kehitetyn mikroaaltoanturin toiminta perustui resonaattoriin, jonka resonanssitaajuus reagoi sen lähiympäristön sähköisiin ominaisuuksiin eli tässä tapauksessa ihon vesipitoisuuteen ja siinä tapahtuviin muutoksiin. Anturin toimintaa testattiin laboratoriossa valmistettujen keinoihojen avulla, jotka vastasivat ominaisuuksiltaan oikeata ihoa kuvastaen eri tilannetta kehon nestetasapainossa. Mitattu resonanssitaajuus muuttui +370 MHz ja -220 MHz kuivan ja kostean ihon välillä verrattuna normaaliin ihoon, tarjoten laajan taajuusalueen ihon tilanteen havainnointiin.Abstrakt
I denna forskning utvecklades nya RF / mikrovågsbaserade sensorlösningar för övervakning av celler och människor för att få en bättre förståelse för deras aktivitet eller tillstånd snabbt, billigt, enkelt och kontinuerligt. Effekten av olika ämnen på beteendet hos celler kan övervakas genom att mäta deras elektriska miljö där förändringar observeras när celler reagerar på stimulanser. Utgångspunkten för studien var ett mikrochip med ett kapacitansmätsystem integrerat i odlingskammaren, vilket möjliggör övervakning av cellproliferation eller död. Utmaningen med studien var den korrekta tolkningen av de mottagna signalerna och kombinationen av ”torr” elektronik och ”våt” biologi, vilket är utmanande problemställningar som måste lösas för systemets tillförlitlighet och hållbarhet. För detta ändamål utvecklades en keramisk förpackning “tillverkad vid låg temperature” som tål cellodlingsförhållanden och inte stör cellaktiviteten. Ett tydligt skift på 1,1 MHz i systemets resonansfrekvens kunde mätas, där storlek på skiftet berodde på antalet celler. En annan del av forskningen i avhandlingen koncentrerade sig på mikrovågssensorn som kan användas vid undersökning och analys av vätskeprover, som kan samlas in från kroppen och ge information om en persons hälsotillstånd. En mikrovågssensor utvecklades som testades på flytande prover. Mikrofluidik integrerades i systemet för hanteringen av flytande prover, vilket möjliggör användning av mycket små provvolymer och förbättrar enhetens användbarhet. Utmaningen med arbetet var att bygga systemet med full integration av delarna och utan att dessa störde varandra. Sensorkonceptet testades framgångsrikt med användning av en typisk NaCl-koncentration som finns i human blodplasma, dvs. 125 till 155 mmol / mol vatten. Den tredje delen av avhandlingen syftade till en mikrovågssensor som möjliggör realtidsmätning av kroppsvätskebalansen direkt på huden. Funktionen för den utvecklade mikrovågssensorn baserades på en resonator, resonansfrekvensen beror på de elektriska egenskaperna hos material i dess närhet, i detta fall hudens vätskeinnehåll och dess förändringar. Sensorns funktion testades med konstgjord hud, som tillverkades i laboratoriet, med motsvarade egenskaper som hos riktig hud. Observerade förändringar i resonansfrekvensen var +370 MHz och -220 MHz för uttorkad och hydratiserad hud jämfört med normal hud, vilket ger ett brett frekvensområde för detektion av hudens statu
Sim Good Reception: utveckling av plattformsoberoende mobilapplikation
No full textApper Systems is a IT consultant company which focuses on administrative system development. One of their software products is Supply Integration Manager (SIM). SIM is used for communication between suppliers and customers. A part of the delivery process is the recieving of goods. This is done with the use of scanning units. Scanning units require maintenance and can be expensive. The purpose of this project was to develop a cross-plattform mobile application which can be an alternative to scanning units and integrate with SIM. With cross-platform development a single application can reach multiple platforms. This streamlines the work process but there are many different developement alternatives and it can be hard to choose. A short evaluation of development alternatives was performed to determine how the application would be developed. The application was developed using web technologies such as HTML, CSS and JavaScript. It has the following supported platforms: Android, iOS and Windows Phone 8. This thesis report describes the performed evalution and the development of the application. The resulting evaluation compared six different solutions, one of these were chosen to develop the application. The resulting application works in accordance to the requirements. This report is written in Swedish
Embedding Prefetching of Audio Content in ARM Processors
No full textThis paper describes the design and implementation an audio amplifier host module. The hardware developed served as a physical interface between the amplifier and an ARM equipped evaluation board capable of running the Linux kernel. Both hardware and software development was carried out at amplifier manufacturer Lab.gruppen facilities according to specified technical requirements. The project resulted in a functioning embedded audio player prototype. More specifically, the project resulted in the necessary underlying hardware and firmware that is intended to serve as a platform for further development of the amplifier host module
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