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2000

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Intraspecific Variation In The Selenium Requirement Of Different Geographic Strains Of The Toxic Dinoflagellate Gymnodinium Catenatum, Martina A. Doblin, Susan I. Blackburn, Gustaaf M. Hallegraeff Jan 2000

Intraspecific Variation In The Selenium Requirement Of Different Geographic Strains Of The Toxic Dinoflagellate Gymnodinium Catenatum, Martina A. Doblin, Susan I. Blackburn, Gustaaf M. Hallegraeff

OES Faculty Publications

The requirement for selenium (IV) was assessed in five strains of the toxic dinoflagellate Gymnodinium catenatum Graham, representing three populations from Tasmania (Australia), as well as one each from Japan and Spain. Strains were grown in nutrient-enriched sea water medium with 10-9 M selenium added as selenite (H2SeO3), or with no added selenium, and monitored for growth and cell yield. Strains exhibited different selenium (Se) requirements, as evidenced by (i) a decrease in exponential growth rate (10-20%) and cell yield (up to 80%) (Japanese strain); (ii) a decrease in cell yield only (Tasmania Derwent Estuary …

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The Effects Of Light And Nitrate Levels On The Relationship Between Nitrate Reductase Activity And (No3-)-N-15 Uptake: Field Observations In The East China Sea, Chin-Chang Hung, George T. F. Wong, Kom-Kee Liu, Fuh-Kwo Shiah, Gwo-Ching Gong Jan 2000

The Effects Of Light And Nitrate Levels On The Relationship Between Nitrate Reductase Activity And (No3-)-N-15 Uptake: Field Observations In The East China Sea, Chin-Chang Hung, George T. F. Wong, Kom-Kee Liu, Fuh-Kwo Shiah, Gwo-Ching Gong

OES Faculty Publications

Nitrate reductase activity (NRA) and 15NO3- uptake (NU) were determined in the East China Sea and the adjoining Kuroshio in May 1996, at six stations covering a range of hydrographic conditions: the nutrient-rich and fresher plume of Changjiang Diluted Water along the Chinese coast, the nutrient-rich upwelling Kuroshio Subsurface Water at the shelf edge northeast of Taiwan, the oligotrophic Kuroshio Surface Water and the mixing zones among these water masses on the shelf. The values of NRA in the surface mixed layer ranged between 16 and 0.1 nM-N h-1, whereas those of NU ranged between …

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The Linkage Between Upper Circumpolar Deep Water (Ucdw) And Phytoplankton Assemblages On The West Antarctic Peninsula Continental Shelf, Barbara B. Prézelin, Eileen E. Hofmann, Claudia Mengelt, John M. Klinck Jan 2000

The Linkage Between Upper Circumpolar Deep Water (Ucdw) And Phytoplankton Assemblages On The West Antarctic Peninsula Continental Shelf, Barbara B. Prézelin, Eileen E. Hofmann, Claudia Mengelt, John M. Klinck

OES Faculty Publications

Intrusion of Upper Circumpolar Deep Water (UCDW), which was derived from the Antarctic Circumpolar Current (ACC), onto the western Antarctic Peninsula (WAP) shelf region in January 1993 provided a reservoir of nutrient-rich, warmer water below 150 m that subsequently upwelled into the upper water column. Four sites, at which topographically-induced upwelling of UCDW occurred, were identified in a 50 km by 400 km band along the outer WAP continental shelf. One additional site at which wind-driven upwelling occurred was also identified. Diatom-dominated phytoplankton assemblages were always associated with a topographically-induced upwelling site. Such phytoplankton communities were not detected at any …

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Biochemical Composition Of Particles And Dissolved Organic Matter Slong An Estuarine Gradient: Sources And Implications For Dom Reactivity, Antonio Mannino, H. Rodger Harvey Jan 2000

Biochemical Composition Of Particles And Dissolved Organic Matter Slong An Estuarine Gradient: Sources And Implications For Dom Reactivity, Antonio Mannino, H. Rodger Harvey

OES Faculty Publications

The chemical composition of high molecular weight dissolved organic matter (DOM) and particulate organic matter (POM) was examined along the salinity gradient of the Delaware Estuary. DOM was collected and fractionated by tangential-flow ultrafiltration into 1-30 kDa (HDOM; high molecular weight) and 30 kDa to 0.2 μm (VHDOM; very high molecular weight) and compared to particles collected in parallel. Polysaccharides comprised 12-43% of particulate organic carbon (POC), 30-56% of VHDOM carbon, and 7.5-19% of HDOM carbon. Hydrolyzable amino acids comprised 17-38% of POC, 5.4-12% of VHDOM carbon, and 1.5-4.2% of HDOM carbon. Only 7-43% of dissolved organic nitrogen in VHDOM …

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Understanding Of The Limit Of Functions Among College Students, Logesh K. Sivapakianathan Jan 2000

Understanding Of The Limit Of Functions Among College Students, Logesh K. Sivapakianathan

Student Works (2000-2009)

This study explored concept images and concept definitions of college students on limits of functions. Their views concerning the attainability of the limit and the extent to which they understood the stand taken by the formal view on this matter were also probed on. The sample comprised 10 students who had completed the Calculus and Analytic Geometry 1 course in the School of American University Studies at a private college in the Klang Valley. A questionnaire on beliefs about limits was administered to them and 4 students were then selected for a task-based interview on the attainability of the limit. …

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High Frequency Characteristic Studies Of The N-Channel Enhancement Mode Power Mosfet Device, Rosli Sahrani Jan 2000

High Frequency Characteristic Studies Of The N-Channel Enhancement Mode Power Mosfet Device, Rosli Sahrani

Student Works (2000-2009)

The n-channel enhancement mode power MOSFET device which is known to have the highest switching speed among the controllable switches group is the device studied in this research work. This commercially packaged device manufactured. by Harris Semiconductor has a combination ofMOSFET and JFET structures superimposed. It has a p-type MOS gate and a reversed biased field induced pin junction laterally at the surface and a vertical JFET structure. A Keithley 590 C-V Analyz.er was used to characterize this device. High frequency (1MHz) capacitance-voltage (C-V) and conductance-voltage (G-V) characteristic were measw-ed across the gate-source, gate-drain and source-drain tenninals of the device. …

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Hubungan Antara Kemahiran Proses Sains Bersepadu Dengan Stail Kognitif Pelajar Pusat Asasi Sains Universiti Malaya, Siti Mariam Mohamad Jan 2000

Hubungan Antara Kemahiran Proses Sains Bersepadu Dengan Stail Kognitif Pelajar Pusat Asasi Sains Universiti Malaya, Siti Mariam Mohamad

Student Works (2000-2009)

ln the past quarter century. science process skills have become major emphases of science curriculum development. The development of science process skills in students is considered to be a major goal of education. The integrated science process skills, which comprised skills of formulating hypotheses, operationally defining, controlling variables, designing experiments and interpreting data are required in the process of problem solving in science. These cognitive skills can be mastered if the learning activities are appropriately matched to the level of the cognitive development of the learner. Valid science curriculum and special instructional strategies are needed to enhanced the extent of …

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Infrared Spectoscopy And Electrical Conductivity Of Copper(Ii) 4-Aminobenzoate And Iondine-Doped Copper(Ii) 4-Aminobenzoate, Chang Fu Dee Jan 2000

Infrared Spectoscopy And Electrical Conductivity Of Copper(Ii) 4-Aminobenzoate And Iondine-Doped Copper(Ii) 4-Aminobenzoate, Chang Fu Dee

Student Works (2000-2009)

Copper(II) 4-aminobenzoate (CAB), prepared from copper(II) acetate monohydrate and 4-aminobenzoic acid, was a dark green powder. Fourier Transfonn lnfrared (FTIR) spectrum of CAB, recorded as KBr disc, indicated the presence of all bonds and functional groups expected of it, and the absence of hydrogen bonding. Its conductivity at room temperature was 4.2 x 10^-11 Scm^·1. The value increased as temperature decreased indicating metallic behaviour. Density of states at Fenni level, hopping distance, hopping energy and density of charge carriers calculated based on Mon's Variable Range Hopping model (VRH) are 2.65x 10^-22 (eV)^-1 cm^-3, 7.47 x 10^-8 cm, 0.02 eV and …

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College Teacher Trainees Understanding Of The Nature Of Science And Its Relationships With Formal Reasoning Ability, Academic Background And Gender, Lee Kim Low Jan 2000

College Teacher Trainees Understanding Of The Nature Of Science And Its Relationships With Formal Reasoning Ability, Academic Background And Gender, Lee Kim Low

Student Works (2000-2009)

This study was designed primarily to determine the understanding of the nature of science among science graduate teacher trainees and to identify their misconceptions of the nature of science. The study also investigated the relationships between the trainees' understanding of the nature of science and the independent variables of formal reasoning ability, academic background, and gender. The subjects of the study comprised 80 teacher trainees from four teacher training colleges in Peninsular Malaysia. A two-part survey questionnaire was used 10 collect the trainees' demographic data and to assess their understanding of the nature of science. The instrument used to assess …

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Hubungan Pemboleh Ubah Terpilih Dengan Pencapaian Fizik Bagi Pelajar Tingkatan Empat, Nor Hashidah Abd Jan 2000

Hubungan Pemboleh Ubah Terpilih Dengan Pencapaian Fizik Bagi Pelajar Tingkatan Empat, Nor Hashidah Abd

Student Works (2000-2009)

The main purpose of this study was to investigate the relationships between student achievement in physics of form four students and selected variables , namely, gender, social economic status , academic achievement in PMR, achievements in the subjects of Bahasa Melayu, mathematics a nd science at PMR level and Attitude Towards Physics (STF). A questionnaire was designed and used to collect data on the students' backgrounds and Attitude Toward Physics. The data on Physics achievement was obtained from the Physics Achievement Test (UPF) developed by the researcher. The study involved 184 form four student from five selected schools in the …

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Intelligent Multimedia Help System For Arithmetic (Arithelp), Noor Lees Ismail Jan 2000

Intelligent Multimedia Help System For Arithmetic (Arithelp), Noor Lees Ismail

Student Works (2000-2009)

This dissertation studies and implements an Intelligent Multimedia Help System for Arithmetic (ARITHELP). The major problem currently faced by the manual references is time constraint. Therefore, the goal of this thesis is to provide a quick and easy help for students using multimedia concepts. This system can be categorized into an expert system type as it transforms an expert knowledge into the system. It consists of 4 components which are an expert model, tutor model, student model and interface model. Overlay model is used as a technique to represent knowledge in student model whereas the pedagogical model is used to …

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Effectiveness Of Programmed Instructional Material In The Teaching Of Relection To Form Two Pupils In A Rural School, Swit Peng Gan Jan 2000

Effectiveness Of Programmed Instructional Material In The Teaching Of Relection To Form Two Pupils In A Rural School, Swit Peng Gan

Student Works (2000-2009)

The primary objective of this study is to determine the effectiveness of programmed instructional material as complementary aids in the teaching of a Mathematical topic, specifically Reflection, to Form Two pupils in a rural secondary school. This is an experimental study. The design of the study is the pre-test-post-test type. An experimental group and a control group were involved in this study. The experimental group used the programmed text, Learn It Yourself Reflection (LIY Reflection) which comprises 4 Units while the control group followed the normal classroom instruction. The students have similar pre-requisite as there is no significant difference in …

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Kajian Terhadap Sistem Persembahan Multimedia Untuk Aplikasi Pendidikan, Mohd. Azul Mohamad Salleh Jan 2000

Kajian Terhadap Sistem Persembahan Multimedia Untuk Aplikasi Pendidikan, Mohd. Azul Mohamad Salleh

Student Works (2000-2009)

This dissertation discussed the networking technology in running distributed multimedia application. Multimedia applications integrate elements such as text, audio, video, graphic, image and animation. These elements have different bandwidth, loss of data, delay and multipoint communications requirements. Multimedia Presentation System (MPS) is a set of applications that integrate elements of multimedia and implemented in a network environment like the internet. This system provides services for input, process and output. MPS is being used for data interchange and information sharing in virtual education. The uses of multimedia elements produce a more effective learning system. The main problem in delivering multimedia elements …

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Method Development And Validation For Drug Analysis By Hplc Gc-Ms, Yann Jen Goh Jan 2000

Method Development And Validation For Drug Analysis By Hplc Gc-Ms, Yann Jen Goh

Student Works (2000-2009)

Enalapril and its metabolite Enalaprilat were determined by gas chromatography - mass spectrometry (GC - MS) and high - performance liquid chromatography (HPLC). For HPLC, the detection limit of enalapril and enalaprilat was 10n g/ml in methanol, whereas for the GC - MS, the detection limit was 6.25ng/ml in plasma. These methods were compared and GC - MS was selected for routine analysis. Enalapril and Enalaprilat in plasma were extracted and cleaned up by using Sep - Pak C 18. Enalapril and Enalaprilat were detected after reaction with diazomethane and were identified by gas chromatography - mass spectrometry as methyl …

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Method Development By Hplc For Separation Of Various Hydrocarbon Groups In Coal Samples From Batu Arang, Selangor, Yong Chee Hui Audrey Jan 2000

Method Development By Hplc For Separation Of Various Hydrocarbon Groups In Coal Samples From Batu Arang, Selangor, Yong Chee Hui Audrey

Student Works (2000-2009)

A preliminary work involving method development for normal stationary phase (silica) pennits the high-performance liquid chromatographic separation or aliphatic and polyaromatic hydrocarbon (PAHs) classes. The Soxhlet extraction method was applied on the coal rock samples and normal phase (silica) short column clean-up separation from highly polymeric material in the coal extract. Method developed on analytical and preparative normal phase silica HPLC columns were to fractionate coal rock extracts, isocratic elution of hexane: ethyl acetate (95 :5, V:V) was found to be quite a good mobile phase. An alternative fractionation method, preparative thin layer chromatography (TLC), was also investigated to separate …

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The Integration Of Relationship Instances From Heterogeneous Databases, Ee Peng Lim, Roger Hsiang-Li Chiang Jan 2000

The Integration Of Relationship Instances From Heterogeneous Databases, Ee Peng Lim, Roger Hsiang-Li Chiang

Research Collection School Of Computing and Information Systems

In the process of integrating legacy databases, one has to resolve inter-database conflicts at both the schema and instance levels. In this paper, we discuss relationship conflicts as a special type of conflicts to be resolved during the database integration. Relationships are properties that relate real world objects. So far, most inter-database relationship conflicts are addressed at the schema-level by various schema integration techniques. However, instance-level relationship conflicts are largely neglected. This paper therefore investigates the causes of instance-level relationship conflicts and proposes a taxonomy for classifying instance-level relationship conflicts. In addition, we develop a systematic process to resolve instance-level …

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A Descriptive Study Of Public Alternative Schools In Georgia, Willie James Wiley Jan 2000

A Descriptive Study Of Public Alternative Schools In Georgia, Willie James Wiley

College of Graduate Studies: Theses & Dissertations (1964–2006)

The purpose of this study was to identify the types of alternative schools in Georgia, to describe the characteristics of the alternative schools, and their students, and to determine the primary goals of the alternative schools. The descriptive information was collected from 97 public alternative schools. The data collected by a 44 item multiple response survey included the perceptions of Georgia's alternative school administrators. The survey items were developed from a literature search and site visits to five different models of alternative schools in a large urban school system The responses were categorized to calculate the range, mean, percentages, and …

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Day Of The Week Effect In The Kuala Lumpur Stock Exchange, 1994-1998, Santhi Arasan Jan 2000

Day Of The Week Effect In The Kuala Lumpur Stock Exchange, 1994-1998, Santhi Arasan

Student Works (2000-2009)

This paper investigates whether the day of the week effect anomaly exists in the Kuala Lumpur Stock Exchange (KLSE) over a period of time from 1994 to 1998 using the Exchange Main Board All-Share Index or the EMAS Index, which incorporates all Main Board Companies. The analysis of the day of the week effect during the study period is further explored in relation to firm size and economic conditions. In relation to firm size, this paper investigates whether the day of the week effect is persistent for both large and small firms by comparing the daily mean returns of the …

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160 University Photograph Collection 1965-1980, University Libraries, Lane Library Jan 2000

160 University Photograph Collection 1965-1980, University Libraries, Lane Library

Finding Aids

Photographs by college staff made (for the most part) after the move to the Southside campus in 1964/1965. Portraits of faculty form the largest part of the collection, also photos of: campus, buildings, students, staff, and events on campus. Especially: graduation, sports and beauty pageants. Some of the photos were published in The Geechee, Armstrong’s yearbook for 1967 and 1968, the yearbook was used to help identify the persons photographed.

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170 University Relations Photograph Collection 1977-2000, University Libraries, Lane Library Jan 2000

170 University Relations Photograph Collection 1977-2000, University Libraries, Lane Library

Finding Aids

Photos in the collection include faculty portraits, special events, campus grounds, departments, athletics, and Masquers. Most of collection is comprised of faculty portraits. Also, extensive special event photos and photos used in marketing campaigns for Armstrong. Not all photos are identified.

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Investigations On The Conductivity Of Organotin-Doped Polyethyleneoxide Polymer System, Lekshmi Sarojiniamma Jan 2000

Investigations On The Conductivity Of Organotin-Doped Polyethyleneoxide Polymer System, Lekshmi Sarojiniamma

Student Works (2000-2009)

Poly(ethylene oxide) (PEO) has been doped with selected organotin compounds. The organotin dopants used were triphenyltin thiocyanate (Ph3SnSCN) and tetramethylammonium dichlorotriphenylstannate [Ph3SnClr[Me4N)•. Tin incorporation in the polymers was established by several physical techniques. The infrared spectroscopic analysis of the Pb3SnSCN - doped electrolyte film showed bands at 2080-2050 cm.·' which are also given by pure Ph3SnSCN. Different concentrations of organotin doped electrolytes were prepared and conductivity studies on these were perfonned using impedance spectroscopy. From the measurements it was found that the best conductivity of 7.6xJ0.g Siem was obtained for the composition with PEO :dopant ratio of90:10 at room temperature. …

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Isolation And Identification Of Sterols In Palm Oil And Their Analysis By Gc Adn Gc-Ms, Ai Chen Han Jan 2000

Isolation And Identification Of Sterols In Palm Oil And Their Analysis By Gc Adn Gc-Ms, Ai Chen Han

Student Works (2000-2009)

The unsaponifiablc matters were separated from crude palm oil, crude palm kernel oil, and crude palm fibre oil. The sterol fractions were isolated by preparative thin layer chromatography and were then analysed by gas chromatography and combined gas chromatography-mass spectrometry. Qualitative separations of sterols are illustrated. Tables are presented showing the sterol composition determined in the oi ls, values obtained for individual contents are in broad agreement with other published results There were no major differences between crude palm oil, crude palm kernel oil and crude palm fibre oil with respect to their sterols oomposition. P-sitosterol was found as the …

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Quadratic Equation In Algebra : Analysis Of Written Responses Among Form Four Students Mathematics Education, Dorothy Dewitt Jan 2000

Quadratic Equation In Algebra : Analysis Of Written Responses Among Form Four Students Mathematics Education, Dorothy Dewitt

Student Works (2000-2009)

This study is an attempt to suggest that persuasion is employed in thesis writing . Based on the Social Constructionist Approach , the present study proposes that persuasion in thesis writing is implicit. This is in line with the demands of the academic community that expects scientific language to be objective. Both qualitative and quantitative analyses were conducted in the study. The major study is a qualitative analysis based on a corpus made up of fourteen (14) Master's theses that were randomly selected from the Arts and Science fields. Two quantitative analyses were also conducted on the corpus. The first …

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Investigations Of Transverse Arc Array Laser Action In Nitrogen Gas, Kee Siang Goh Jan 2000

Investigations Of Transverse Arc Array Laser Action In Nitrogen Gas, Kee Siang Goh

Student Works (2000-2009)

In almost all pulsed gas lasers, transverse electrical discharge is employed in the excitation of the atoms or molecules. These lasers normally employ discharge across a pair of common electrodes to provide large volume and uniform glow discharge. The scaling of output power in such lasers is obtained by increasing the volume of the discharge and also the pressure of the discharge gas. For this reason. the energy coupled into the discharge channel is kept low enough to avoid arcing. Under these circumstances, the electron temperature of such uniform glow discharge is not sufficient to produce excitation of VUV or …

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E-Commerce : Web Page Standards And Consumer Confidence, Natarajan @ Kumar Nc Krishnan Jan 2000

E-Commerce : Web Page Standards And Consumer Confidence, Natarajan @ Kumar Nc Krishnan

Student Works (2000-2009)

This thesis involves around the generation of a set of recommendations for web page design that could be possibly used by authorities or auditing firms to audit and approve commercial web pages that comply to the standards. The recommendations shall cover what information consumers would like to see on commercial web pages. The contents of a web page are critically important in Electronic Commerce as it is the only interface between consumers and the merchant. Web Page Approval shall be a preferred way of identifying a web page to do online business by potential consumers. Consumer shall have increased confidence …

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On Strongly N-Regular And Strongly Regular Rings, Huey Voon Chen Jan 2000

On Strongly N-Regular And Strongly Regular Rings, Huey Voon Chen

Student Works (2000-2009)

Let R be an associative ring with identity 1 (not equal to) 0. An element x E R is said to be right (or left) regular if there exists yin R such that x² y = x (or y.x² = x). If x is both left and right regular, then it is said to be strongly regular. The ring R is said to be strongly regular if every element of R is strongly regular. We say that x is a left -π-regular element if there exist an integer n > 0 and an element y E R such that yx n+1 …

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Optimisation Of Transverse Arc Array Laser, Albert Kok Foo Ng Jan 2000

Optimisation Of Transverse Arc Array Laser, Albert Kok Foo Ng

Student Works (2000-2009)

A novel discharge scheme is proposed for the pumping of short wavelen,gth lasers. This scheme had been tested to produce fast current pulse and a 5 kA current in 60 nsec is obtained. Lasing action has been observed by using nitrogen gas. The laser line is 337 nm from the strong transitions of nitrogen molecules. The new discharge scheme is based on the concept of an arc array amplifier. It essentially consists of 48 pairs of electrodes which are lined up to form an array of arc discharge. Its electrical circuitry allows each pair of the electrodes to be decoupled …

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A System For Analysing Patient History (Az-Phis), Kemalatha Krishnasamy Jan 2000

A System For Analysing Patient History (Az-Phis), Kemalatha Krishnasamy

Student Works (2000-2009)

The improvement of health care service has a great effect on patient satisfaction. In order to improve the health care service, effective processing of patient history and analysis on the respondent is necessary. The results of the statistical analysis performed on patient history eases the decision making of physicians and other related medical staff. Therefore, this dissertation mainly investigates information pertaining to patient history, statistical analysis, and development of a system for analyzing patient history. The study employs the questionnaire survey method to gather data and make analyses using the Spreadsheet; Microsoft® Excel 97. The survey was done in government …

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A System To Keep Track Of Medical Expertise (Medix), Kasthuri Subaramaniam Jan 2000

A System To Keep Track Of Medical Expertise (Medix), Kasthuri Subaramaniam

Student Works (2000-2009)

This dissertation presents a system for keeping track of medical expertise as well as demonstrates the integration of different tools in a single application. MediX, a system to keep track of medical expertise, maintains the records of medical expertise, medical centres and specialties. MediX uses reporting, statistical, database, and authoring tools that are integrated in a programming package running under an operating system. MediX is a client/server-based system that has many significant features. MediX provides the tools necessary to view existing information in new forms and combinations. These include generation of reports. charts and graphs as well as statistical computing, …

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Analysis Of Selected Trace Metals In Water Using Differential Pulse Polarography And Anodic Stripping Voltammetry, Kar Yi Tong Jan 2000

Analysis Of Selected Trace Metals In Water Using Differential Pulse Polarography And Anodic Stripping Voltammetry, Kar Yi Tong

Student Works (2000-2009)

In this project, two types of the electroanalytical methods have been studied, which are the Differential Pulse Polarography_ (DPP) and Differential Pulse Stripping Voltammetry (DPSV). The DPP mode is used to identify the half-wave potential for the metals, including the lead, cadmium, and zinc. The DPP mode is also used to determine the detection limits for the lead, cadmium, and zinc. Meanwhile, the DPSV mode is used to identify the half-wave potential for the metals. The optimum conditions for the DPSV has to be determined, in order to be used to determine the concentrations of the lead, cadmium, and zinc …

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