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Search Results: 1 - 10 of 500 matches for " Sherescan instrument "
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Investigation of various properties of monocrystalline silicon solar cell
L.A. Dobrzański,M. Musztyfaga,M. Giedro?,P. Panek
Journal of Achievements in Materials and Manufacturing Engineering , 2012,
Abstract: Purpose: The aim of the paper was to apply Sherescan instrument, which is a valuable tool used for fault detection, error diagnosis and process optimization by cell manufacturers, paste suppliers, institutes and universities all over the world.Design/methodology/approach: Screen printed front side contacts and next to co-fired them in the infrared conveyor furnace were carried out at 920°C temperature. A commercial silver paste to form front side metallization was apply into investigations. The investigations were carried out on monocrystalline silicon wafers. Front side metallization of solar cell was formed on textured surface with coated antireflection layer. Investigated were both surface topography and cross section of front contacts using the SEM microscope. The size of textured silicon surface was measured using the AFM microscope. The thickness of tested front contacts was measured using SEM and CLSM microscope. The metal resistance of solar cells was investigated using the ‘Sherescan’ instrument. The I-V characteristics of solar cells were also investigated.Findings: The technological recommendations for the co-firing technology in order to produce a uniformly melted structure, well adhering to the substrate, with the low resistance of the front electrode-to-substrate joint zone.Research limitations/implications: The resistance of the metal-semiconductor connection zone depends on conductive paste composition from which the paths were made, as well as manufacturing conditions.Originality/value: The influence of the obtained front side metallization features on electrical properties of solar cell was estimated.
Building Inter-Organizational Social Capital Instruments to Evaluate Collaborative Networks  [PDF]
Janaina Macke, Rolando Vargas Vallejos, Eduardo Dalpiccoli Toss
iBusiness (IB) , 2010, DOI: 10.4236/ib.2010.21007
Abstract: This paper presents the development process of an inter-organizational social capital survey to evaluate collaborative networks. The survey instrument construction was based on three main sources. The first one, was a deep literature research that covered social capital and collaborative network issues. The second, a meta-analysis from well-known journals basically taken from the Business Source Premier Database. Finally, the third, was an exploratory research done in a Brazilian enterprise collaborative network. In this exploratory phase, we used semi-structured interviews, direct observation and document analysis. As a result of this work, we present two instruments for inter-organizational social capital evaluation: a qualitative instrument, built in the first stage of the study and a quantitative instrument (survey) built from the results of the exploratory phase.
A comperative study to nvestigate teaching processes of baglama and classical guitar
Zekeriya Kaptan,Sad?k Y?ndem
International Journal of Human Sciences , 2010,
Abstract: In this study, teaching processes of ba lama (a long-necked Turkish lute)and classical guitar are investigated to be comparativly. The study aims to answer the following questions: How has the teaching process of these instruments proceed in our country? What are the teaching strategies of this instrument? What differences and similarities between the teaching process of these two in instruments? This is a qualitative research. The opinions of experts by using the interview technique was taken. Also, related literature were examined comprehensivly. The data that obtained from research were evaluated by applying methods of descriptive analysis. The results indicate that teaching processes of ba lama and classical guitar have some differences in our country and each instruments has their own theaching styles
Efficiency of diagnostic model to predict recurrent suicidal incidents in diverse world communities  [PDF]
Vatsalya Vatsalya, Kan Chandras, Shweta Srivastava, Robert Karch
Journal of Biomedical Science and Engineering (JBiSE) , 2009, DOI: 10.4236/jbise.2009.27074
Abstract: Suicidal attempts have a very significant effect on the society, and they also reflect on the efforts of the supporting health care and counseling facilities; and the mental health professionals involved. The impact of suicide is further magnified by the needs of persons who attempt suicide multiple times, requiring emergency health care and rehabilitation. Preventing such activities becomes a major task for the support providing agencies as soon as patient with such tendencies are identified. There are repetitive traits that can be observed during the entire therapeutic program among the high-risk group individuals, who are susceptible to this kind of activity and such traits indicate for specific profiling. The aim of the instrument is to prevent the occurrence of the repetitive suicidal attempts of the patients in various world regions, which may have significantly higher and concerning suicide rates. This profile has been constructed on the various parameters recognized in the statistical analysis of the patient population, which have been identified or can be under treat-ment for their suicidal behavior. This instrument is developed to predict the probability of population segments who may attempt suicide and repetitively, by matching the parameters of the profile with that of the patient pool. Building a profile for the purpose of predicting behavior of this kind can strengthen the intervention strategies more comprehensively and reduce such incidents and health care requirements and expenses.
Influence of Vertical Resolution on the Validation of Atmospheric Chemistry Instruments  [PDF]
Guochang Zhang
Atmospheric and Climate Sciences (ACS) , 2011, DOI: 10.4236/acs.2011.13011
Abstract: A large number of validation campaigns for atmospheric chemistry instruments are being carried out and more such studies will be performed in the future. The aims of validation are to confirm the accuracy and precision of the measurement of a new instrument. There are many factors that may deteriorate the validation results and one of them is the vertical resolution of instruments when using the profiles intercomparison ap-proach. The influence from the vertical resolution can be eliminated by using the averaging kernel method but it is necessary to find the conditions for using the method. This study simulated the influence of vertical resolution for a certain curvature. The results show that both the curvature of a profile and the difference of vertical resolution between two instruments have positive correlation with the differences between their measurements. The quantitative estimations of influence for some practical vertical resolutions were ob-tained. The combined error of two instruments was defined as the criteria to judge the significance of influ-ence. A case study based on the simulated results was demonstrated to show when the influence from the vertical resolution should be considered and when such influence can be omitted in order to avoid some un-necessary works in validation.
Computer Aided Modeling and Dynamic Analysis of A New Surgical Instrument  [PDF]
Jeremy (Zheng) Li
Surgical Science (SS) , 2012, DOI: 10.4236/ss.2012.35047
Abstract: One major difference among surgical instruments is the level of bodily disruption and tissue trauma that surgical devices might cause the patients. This newly designed and developed surgical instrument aims at minimally invasive therapy procedure, more reliable and durable function, less operational force, and reduced manufacturing cost. The computer aided modeling and simulation have been applied to help this new instrument design and analysis. This improved new surgical instrument is designed to use in general surgery to prevent patient's vessels and tissues from being damaging due to reliable motion control of surgical clips with no unexpected clip drop. It can also be applied to surgical education purpose to educate medical students for their future surgical careers. The prototype testing indicated that the handle operational force to close surgical clips is lower than current surgical clip instruments, product manufacturing is cost-effective due to less dimensional tolerance control of this new instrument design, more reliable instrument function, and good mechanical advantage.
Screening for Personality Disorders: A Comparison of the Dimensional NEO-FFI with the Categorical SAPAS-SR  [PDF]
Sara Germans, Alexander Rath, Guus L. Van Heck, Paul P. G. Hodiamont
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.42016

In psychiatric outpatients, the usefulness of the dimensional NEO-FFI as a screening instrument for personality disorders (PDs) was compared with the categorical screening instrument SAPAS-SR using the SCID-II as the gold standard. Major research questions are: 1) is the NEO-FFI a useful screening instrument for PDs? 2) does the NEO-FFI outperform a categorical screening instrument (SAPAS-SR)? 3) does combining both instruments improve the screening results? Extreme raising on Big Five personality trait domains (NEO-FFI) domain scores were examined in relation to the presence and the number of PDs as diagnosed, with to the SCID-II. Additionally, the NEO-FFI, in conjunction with a short self-report screening instrument (SAPAS-SR), was analysed with respect to sensitivity and specificity for screening of PDs. According to the SCID II, 97 patients (50%) were suffering from a PD. The majority of them had no (35.9%) or only one (40%) extreme score on one of the Big Five personality domains. There were no significant relationships between separate extreme traits on PD or five factor profiles, as proposed in the literature, and the presence of a SCID-II PD. Comparisons of the NEO-FFI with the SAPAS-SR showed no significant relationships. Using both screeners in conjunction resulted in an increase in specificity and the number of correctly classified cases at the expense, however, of the sensitivity. Correlation and regression analyses showed that personality traits are statistically significant predictors for each of the12 PDs. However, the associations between NEO-FFI scores and the DSM-VI-TR PD criteria were rather modest. Support could not be obtained for the view that separate extreme scores on basic personality traits or combinations of such scores in five-factor profiles will provide adequate screening possibilities for PDs. The SAPAS-SR has better screening potential than the NEO-FFI or the SAPAS-SR and the NEO-FFI together.

The Application and Perspective of Multimedia Technology in Chemistry Experimental Instruction in China  [PDF]
Dimei Chen, Xia Chen, Wenxia Gao
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.44035

The paper elaborates the features and superiority of applying multimedia technology to chemistry experiment instruction in details, and introduces the practical application of multimedia technology in demonstration experiment. The application of multimedia technology in chemistry experimental instruction has its own features, namely enjoyment, great information capacity, sharing network, easy operation and flexibility. The paper concludes the superiority of applying multimedia technology to the chemistry experiment instruction from nine perspectives. Meanwhile, the paper elaborates its disadvantages. Simulated experiments cannot take place of real experiments. The relationship among teachers, students and multimedia needs to be dealt with properly, and the multimedia courseware should be scientific. Prospective forecast of multimedia technology in chemistry experimental instruction is also demonstrated.

Communication Technology and Application of Seismic Precursor Network Instrument  [PDF]
Jianguo Wang, Wei Wang, Huiqin Yao, Xun Gao, Mingdong Zhang
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.51B001
Abstract: In this paper, the communication technology of seismic precursor network instrument is introduced, including instruction format and returned information format of instrument login, status information acquisition, and current measured data acquisition. The remote monitoring alarm software is based on this technology, and also introduced that the structure of monitoring information table, abnormal alarm index, and monitoring strategy. The application of the software raises instrument running rate and observation data quality.
A Pure Mathematical Relationship between Pitch and Position for Stringed Instruments  [PDF]
Nan Yang, Dawei Zhang, Yanling Tian
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.510143

In this paper, a simple mathematical model was proposed to answer such a question: what’s the relationship between the finger pressing position and the corresponding pitch for stringed instruments? Furthermore, we compared the theoretical results with measurement results which were obtained from a guitar to prove that the model we propose is reliable. Result shows that relative errors of theoretical results and measurement results are from 0.18% to 1.8%. The mathematics model is more concise, direct and clear than physical model.

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