130,462 research outputs found
EXPANDING FUNCTIONALITIES OF THE MS DYNAMICS NAV 2009 ENTERPRISE RESOURCE PLANNING SOLUTION
No full textV diplomskem delu smo obravnavali problematiko prilagajanja celovite informacijske rešitve Microsoft Dynamics NAV 2009. Poleg teoretične opredelitve rešitev ERP in poslovnih procesov kot osrčja poslovanja sodobnih organizacij, je bil glavni cilj prikaz možnosti prilagajanja omenjene rešitve podjetja Microsoft specifičnim potrebam organizacij. Ugotovili smo, da v splošnem za to obstajata dva načina – nastavljanje parametrov in razširjanje obstoječih funkcionalnosti – ter da so med glavnimi kriteriji pri odločanju med njima dobre prakse. Za demonstracijo smo identificirali obstoječ poslovni proces, izdelali predlog izboljšav in razširitev tudi implementirali. Pokazali smo, da mora biti razširjanje obstoječih funkcionalnosti zelo dobro premišljeno, saj lahko sicer izgubimo pridobitve celovite informacijske rešitve.In this work we dealt with tailoring enterprise resource planning solution Microsoft Dynamics NAV 2009 to specific needs. Apart from generally defining Enterprise Resource Planning solutions and business processes as the heart of modern organizational approach, our main goal remained to present the possibilities of expanding the mentioned solution. We identified two options – configuring parameters and expanding existing functionalities and stressed best practices as the main criteria for deciding between them. With the aim of illustrating a practical approach to expanding the NAV’s functionality, we identified and analyzed an existing business process. We offered a proposition for optimization and implemented it. Our conclusion was that expanding functionalities of ERP solutions has to be considered thoroughly
Financial transaction processing with Hadoop
No full textV okviru magistrskega dela je bila izdelana aplikacija, ki omogoča paralelno procesiranje masovnih kartičnih transakcij, t.i. avtorizacij. Programska rešitev temelji na odprtokodnem ogrodju Apache Hadoop, ki je namenjeno obdelovanju velikih količin podatkov (angl. big data). S pristopom Hadoop razbijemo vhodne podatke na več manjših delov, ki se paralelno procesirajo. Hadoop je sestavljen iz dveh glavnih komponent. MapReduce vhodni niz podatkov razdeli na med seboj neodvisne dele, ki se obdelajo paralelno. Datotečni sistem HDFS (angl. Hadoop distributed file system) je bil razvit v programskem jeziku Java in je implementiran za zagotavljanje prilagodljivega in zanesljivega shranjevanja podatkov na več med seboj povezanih računalnikih (angl. clusters of commodity servers). Glavna prednost uporabe Hadoopa je v porazdeljenem sistemu, sestavljenem iz več manj zmogljivih računalnikov in ne le enega zelo zmogljivega. Računalniki se lahko nahajajo na različnih lokacijah, zato ne potrebujemo dodatnega redundantnega sistema, ki služi za samo vzpostavitev sistema v primeru naravne katastrofe.Within the scope of this master thesis an application was developed, which enables parallel processing of large financial transactions or authorizations. The software solution is based on the Apache Hadoop open source framework, which is designed to handle big data as input. With the Hadoop approach, input data is broken down into several smaller parts and processed in parallel. The Hadoop framework contains two main components. MapReduce divides the input dataset into independent parts, processed in parallel. The Hadoop distributed file system (HDFS) was developed in the Java programming language and was implemented to provide a flexible and reliable way to store data on multiple clusters of commodity servers. The main advantage of using the Hadoop framework is in its distributed system approach which consists of several less powerful computers working in sync and not only one very powerful computer. Computers can be located in different locations, thus rendering the use of other redundant systems in the case of a natural disaster unnecessary
SIMULATION OF PAGE REPLACEMENT ALGORITHMS
No full textV diplomskem delu smo zasnovali in implementirali simulator za zamenjavo strani pri virtualnem
pomnilniku. Simuliramo lahko naslednje algoritme: kdor prej pride, prej meljeredko uporabljennajdalj časa neuporabljenalgoritem druge možnosti ter naključni. Po literaturi smo povzeli opise in
lastnosti teh algoritmov, predstavili delovanje s psevdokodom ter izpostavili njihove prednosti in
slabosti.
Po zastavljenih zahtevah in specifikacijah smo zasnovali simulator, ki smo ga napisali v
programskem jeziku C#, razvili pa v programskem okolju Visual Studio. Grafični uporabniški
vmesnik med simulacijo nazorno kaže, kako se posamezne strani selijo iz diskovnih zapisov v
delovni pomnilnik in kako ga zapuščajo, ko je poln, če so izbrane za zamenjavo. Simulator šteje
napake strani, hkrati pa vodi simulirani čas za izvajanje procesov, ki vsebujejo te strani.
V nalogi smo tudi analizirali delovanje simulatorja in ga preizkusili z nekaj izbranimi primeri, s
katerimi smo želeli preveriti uspešnost različnih algoritmov za zamenjavo strani pri enakem naboru
izvajanih procesov. Rezultate smo prikazali grafično in jih ovrednotili,
primerjali obnašanje algoritmov v simuliranih situacijah.In this diploma thesis we designed and implemented a simulator of page replacement algorithms comprising the virtual memory. The following algorithms can be simulated: first in first (FIFO), second chance (SC), least recently used (LRU), not frequently used (NFU) and random (RND). Based on existing publications, we recapitulated descriptions and features of all the algorithms, presented their functionality by pseudo-code, and exposed their strengths and weaknesses.
Following the application requirements and specifications, we designed the simulator\u27s structure, wrote it in the C# programming language and developed in the Visual Studio software environment. Graphical user interface accompanies the simulation by the intuitive presentation of page transfer from the disk into the memory, and in the opposite direction when pages are replaced. The simulator counts page faults and, at the same time, measures simulated time when the processes\u27 execution is simulated.
In our thesis, we also analysed the simulator\u27s operation and tested on a few examples to assess the efficiency of the different page-replacement algorithms applied to the same sequence of the executed processes. The results were depicted graphically and numerically in order to illustrated the behaviour of each algorithm in simulated situations
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
The role of vitamin D in the prevention of osteoporosis
No full textUvod: Vitamin D je poznan kot hranilo in hormonje v maščobi topen vitamin, ki skrbi za razvoj imunskega sistema in kosti. V zadnjem času se veliko poroča o pomanjkanju vitamina D, kar predstavlja velik javnozdravstveni problem. Zmanjšan nos vitamina D vpliva na večjo pojavnost srčno-žilnih bolezni, rakavih obolenj, avtoimunskih bolezni in drugih. Poleg naštetega pa je hipovitaminoza D povezana tudi s pojavnostjo osteoporoze, ki je sistemska kostna bolezen, za katero je značilna nižja kostna gostota. Namen: S tem pregledom literature smo želeli predstaviti vitamin D in njegovo delovanje. Želeli smo predstaviti osteoporozo in pojasniti, kakšen je vpliv vitamina D na pojavnost osteoporoze. Metode dela: Uporabili smo deskriptivno metodo dela. Narejen je pregled slovenske in tuje literature. Uporabljena literatura se navezuje na vitamin D, osteoporozo in na njuno povezavo. Uporabljena literatura je bila objavljena med letoma 2007 in 2019. Iskana je bila v podatkovnih bazah PubMed in Science Direct. Nekaj virov je tudi iz digitalne knjižnice Univerze v Ljubljani. Razprava in zaključek: Vitamin D izboljša imunski sistem, vpliva na počutje in pojavnost srčno-žilnih bolezni, rakavih obolenj, avtoimunskih bolezni, osteoporoze in drugih. Pojavnost osteoporoze je povezana s hipovitaminozo D. Bolniki z osteoporozo bi morali imeti najmanj 20 ng/ml oziroma 50 nmol/l 25(OH)D za doseganje optimalnega zdravja kosti. Z doseganjem normalnih vrednosti vitamina D bi pri starejšem prebivalstvu dosegli boljšo kakovost življenja, manj padcev in poškodb. Normalne vrednosti vitamina D pa bi lahko zmanjšale tudi negativne simptome nekaterih bolezni, predvsem avtoimunskih.Introduction: Vitamin D is known as a nutrient, as a hormone and is a fat-soluble vitamin that takes care of the development of the immune system and bones. Lately there is a lot of vitamin D deficiency reported, which is a major public health problem. Reduced vitamin D intake affects the incidence of cardiovascular disease, cancer, autoimmune disease, and others. In addition to this, hypovitaminosis D is also associated with the incidence of osteoporosis, which is a systemic bone disease with lower bone density. Purpose: With this review of the literature we wanted to present vitamin D and its activity, present osteoporosis, its formation and explain the impact of vitamin D on osteoporosis. Methods: We used a descriptive method of work. An overview of Slovene and foreign literature is made, which is related to vitamin D, osteoporosis and their association. The literature used was published between 2007 and 2019. References were sought in the following databases: PubMed and Science Direct. Some sources are also from the Digital Library of the University of Ljubljana. Discussion and conclusion: Vitamin D effects on general well-being, incidence of cardiovascular diseases, cancer, autoimmune diseases, osteoporosis and other diseases. The occurrence of osteoporosis is associated with hypovitaminosis D. Patients with osteoporosis should have a minimum of 20 ng/ml or 50 nmol/l 25(OH)D to achieve optimal bone health. By attaining normal vitamin D values, the older population would achieve better quality of life with fewer falls and injuries. Normal vitamin D values may also reduce the negative symptoms of some diseases, especially autoimmune ones
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Impact of the covid-19 epidemic on vitamin D intake from dietary supplements and medications in premenopausal and postmenopausal women
No full textUvod: Pandemija covida-19 je vplivala na povečan vnos prehranskih dopolnil z namenom preprečevanja okužbe. Visokoogrožene skupine, pri katerih zaznavamo višjo smrtnost, sovpadajo s skupinami, pri katerih pogosteje ugotovimo visoko pojavnost pomanjkanja vitamina D. Skupini, ki imata pogosto nizke ravni vitamina D, so premenopavzne in pomenopavzne ženske. Namen: Ugotoviti želimo status vitamina D pri premenopavznih in pomenopavznih ženskah med pandemijo covida-19 v Sloveniji. Naš cilj je s pomočjo vprašalnika in meritev serumskega 25(OH)D ugotoviti vpliv pandemije covida-19 na status vitamina D ter jemanje vitamina D iz prehranskih dopolnil in zdravil. Metode dela: Uporabljeni sta bili deskriptivna metoda s pregledom slovenske in tuje strokovno-znanstvene literature ter kvantitativna metoda z anketnim vprašalnikom in odvzemom vzorcev krvi preiskovank za merjenje vrednosti vitamina D. V končno analizo je bilo vključenih 176 žensk iz osrednjeslovenske regije, starih od 44 do 65, od tega 69 premenopavznih in 107 pomenopavznih. Raziskava je bila izvedena med 1. marcem in 31. majem 2021. Rezultati: 25(OH)D pri celotnem vzorcu je bil 66,42 ± 27,36 nmol/L. Pomenopavzne ženske so imele višjo raven 25(OH)D (69,64 ± 27,81 nmol/L) od premenopavznih (61,43 ± 26,06 nmol/L). 61,36 % preiskovank je jemalo prehranska dopolnila in zdravila z vitaminom D. Od celotnega vzorca jih je 28 % prebolelo covid-19. Za pomanjkanje vitamina D je razmerje obetov OR = 7,59p 5µg/dan). 25(OH)D je bil pri preiskovankah, ki so vitamin D dodajale s prehranskimi dopolnili ali zdravili, za približno 20 nmol/L višji v primerjavi s tistimi, ki vitamina D niso dodajale. Ne glede na povišano raven 25(OH)D je bil ta pod optimalno mejo 75 nmol/L.Introduction: The COVID-19 pandemic has led to an increased interest in the use of dietary supplements to prevent infection. High-risk groups, complications, and higher mortality rates are often associated with populations exhibiting a higher prevalence of vitamin D deficiency. Such groups, notably including postmenopausal women, coincide with those vulnerable to severe outcomes from COVID-19. Purpose: This study aimed to assess the vitamin D status among premenopausal and postmenopausal women during the COVID-19 pandemic in Slovenia. The primary objectives were to investigate the impact of the pandemic on vitamin D status and the use of vitamin D supplements and medications through a questionnaire and serum 25(OH)D measurements. Methods: A descriptive methodology was employed, involving a review of domestic and foreign scientific literature and quantitative method with a questionnaire survey, and blood sample collection from participants for measuring vitamin D levels. The final analysis included 176 women aged 44 to 65 from the central Slovenian region, comprising 69 premenopausal and 107 postmenopausal women. The study was conducted between March 1 and May 31, 2021. Results: The 25(OH)D level in the entire sample was 66.42 ± 27.36 nmol/L. Postmenopausal women exhibited higher 25(OH)D levels (69.64 ± 27.81 nmol/L) compared to premenopausal women (61.43 ± 26.06 nmol/L). Of the total sample, 61.36% of participants were taking vitamin D supplements and medications. Additionally, 28% of the participants had a history of COVID-19 infection. The odds ratio (OR) for vitamin D deficiency of the whole sample was 7.59 (p 5 µg/day). Participants who supplemented with vitamin D exhibited approximately 20 nmol/L higher 25(OH)D levels compared to those who did not. Despite the elevated 25(OH)D levels, they remained below the optimal threshold of 75 nmol/L
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
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