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81.
Povezanost statusa telesne teže in športne aktivnosti s telesno samopodobo učencev 2. in 3. triletja
Darko Pepevnik, 2008, izvirni znanstveni članek

Opis: V prispevku smo opredelili pojem telesne samopodobe, predstavili nekatere novejše raziskave s področja telesne samopodobe v povezavi s športno aktivnostjo mladostnikov in empirično raziskali povezanost statusa telesne teže in športne aktivnosti s telesno samopodobo otrok in mladostnikov. Empirična raziskava temelji na skupinskem slučajnostnem vzorcu učencev (n = 161), starih od 9 do 15 let (AS = 11,87, SO = 1,90), med katerimi je 86 dečkov in 75 deklic. Podatke smo zbrali z uporabo prevzetega vprašalnika (The Children and Youth Physical Self–Perception Profile), ki smo mu dodali še vprašanja o starosti, spolu, telesni teži, telesni višini in o športni aktivnosti ter jih obdelali na nivoju deskriptivne in inferenčne statistike. Preverjali smo povezanost statusa telesne teže učencev in njihove športne aktivnosti z ocenjevanjem posameznih razsežnosti telesne samopodobe in telesne samopodobe kot celote. Ugotovili smo, da je 76,4 % učencev primerno težkih, 21,1 % prekomerno težkih in 2,5 % debelih. Odkrivamo statistično značilne razlike v ocenjevanju nekaterih razsežnosti telesne samopodobe, kot so: vzdržljivost, telesni videz in globalna telesna samopodoba, pa tudi v ocenjevanju celotne telesne samopodobe med primerno in prekomerno težkimi ter med primerno težkimi in debelimi učenci. Športno aktivnih je 159 učencev, od tega 113 rekreativno in 46 rekreativno in tekmovalno. Uspeli smo dokazati obstoj statistično značilnih razlik med učenci, ki se s športom ukvarjajo rekreativno, in med učenci, ki se s športom ukvarjajo rekreativno in tekmovalno, v ocenjevanju športnih kompetenc, vzdržljivosti, moči in telesne samopodobe kot celote. Ugotavljamo, da imajo učenci, ki so primerno težki in se s športom ukvarjajo tekmovalno, višjo telesno samopodobo kot učenci, ki so prekomerno težki ali debeli in se s športom ukvarjajo samo rekreativno.
Ključne besede: športna aktivnost, gibalna dejavnost, telesna teža, učenci, samopodoba
Objavljeno: 04.09.2017; Ogledov: 53; Prenosov: 1
.pdf Polno besedilo (126,96 KB)

82.
83.
Validation of agent-based approach for simulating the conversion to organic farming
Črtomir Rozman, Andrej Škraba, Karmen Pažek, Davorin Kofjač, 2017, izvirni znanstveni članek

Opis: Background and Purpose: The purpose of this study is to describe the principles of the development of parallel system-dynamics and agent-based models of organic farming for the case of Slovenia. The advantage of agent-based modeling is demonstrated by including geospatial information as an agent attribute. The models were compared by the validation, confirming the appropriate level of similarity. Design/Methodology/Approach: Both system-dynamics and agent-based modeling approaches were applied. Statistical methods were used in the validation. Results: The results of the validation confirm the appropriateness of the proposed agent-based model. Introducing additional attributes into the agent-based model provides an important advantage over the system-dynamics model, which serves as the paradigmatic example. Conclusion: A thorough validation and comparison of the results of the system-dynamics and agent-based models indicates the proper approach to combining the methodologies. This approach is promising, because it enables the modeling of the entire agricultural sector, taking each particular farm into account.
Ključne besede: agent-based models, organic farming, system dynamics, validation, multimethod simulation
Objavljeno: 01.09.2017; Ogledov: 57; Prenosov: 2
.pdf Polno besedilo (798,59 KB)

84.
The importance of business model factors for cloud computing adoption
Kristina Bogataj Habjan, Andreja Pucihar, 2017, izvirni znanstveni članek

Opis: Background and Purpose: Bringing several opportunities for more effective and efficient IT governance and service exploitation, cloud computing is expected to impact the European and global economies significantly. Market data show that despite many advantages and promised benefits the adoption of cloud computing is not as fast and widespread as foreseen. This situation shows the need for further exploration of the potentials of cloud computing and its implementation on the market. The purpose of this research was to identify individual business model factors with the highest impact on cloud computing adoption. In addition, the aim was to identify the differences in opinion regarding the importance of business model factors on cloud computing adoption according to companies’ previous experiences with cloud computing services. Methodology: Based on literature review, prior research results, and interviews with cloud computing providers and users, a research model was developed. Statistical analysis focused on identification of factors’ importance on cloud computing adoption and differences in opinions according to respondents’ previous experiences with cloud computing services. The study was done among 80 companies and five major cloud computing providers in Slovenia. Results: The research results reveal statistically significant differences in opinions on the importance of cloud computing business model factors according to respondents’ previous experiences with cloud computing services. The results can provide orientation for redesign or innovation of existing business models towards the creation of a customer-oriented business model for the more successful exploitation of cloud computing services and business opportunities. For potential users, the findings represent guidelines for the successful adoption of cloud computing services. Conclusions: In our research, the investigated business model factors could be classified into so-called “business model organizational factors”, as they primarily need to be considered by cloud service providers when defining or innovating their business models. For future research, the model should also include the impact of environmental factors, such as Competition, Business Partners, Legislation, Economic Situation, in order to investigate their impact on cloud adoption.
Ključne besede: cloud computing adoption, SaaS, IaaS, business model factors
Objavljeno: 01.09.2017; Ogledov: 55; Prenosov: 0
.pdf Polno besedilo (1,02 MB)

85.
Organizational learning supported by machine learning models coupled with general explanation methods
Marko Bohanec, Marko Robnik Šikonja, Mirjana Kljajić Borštnar, 2017, izvirni znanstveni članek

Opis: Background and Purpose: The process of business to business (B2B) sales forecasting is a complex decision-making process. There are many approaches to support this process, but mainly it is still based on the subjective judgment of a decision-maker. The problem of B2B sales forecasting can be modeled as a classification problem. However, top performing machine learning (ML) models are black boxes and do not support transparent reasoning. The purpose of this research is to develop an organizational model using ML model coupled with general explanation methods. The goal is to support the decision-maker in the process of B2B sales forecasting. Design/Methodology/Approach: Participatory approach of action design research was used to promote acceptance of the model among users. ML model was built following CRISP-DM methodology and utilizes R software environment. Results: ML model was developed in several design cycles involving users. It was evaluated in the company for several months. Results suggest that based on the explanations of the ML model predictions the users’ forecasts improved. Furthermore, when the users embrace the proposed ML model and its explanations, they change their initial beliefs, make more accurate B2B sales predictions and detect other features of the process, not included in the ML model. Conclusions: The proposed model promotes understanding, foster debate and validation of existing beliefs, and thus contributes to single and double-loop learning. Active participation of the users in the process of development, validation, and implementation has shown to be beneficial in creating trust and promotes acceptance in practice.
Ključne besede: decision support, organizational learning, machine learning, explanations
Objavljeno: 01.09.2017; Ogledov: 51; Prenosov: 0
.pdf Polno besedilo (1,31 MB)

86.
Homecare service providers as an organizational form of support for the elderly
Polona Šprajc, Iztok Podbregar, Alenka Brezavšček, 2017, izvirni znanstveni članek

Opis: Background and Purpose: Different studies have highlighted health care allocation problems in Slovenia that indicate the increased need for homecare services for the elderly. It was also found that Slovenian municipalities differ dramatically in the availability of elder care services. A number of older people with diverse unmet needs for care remains. Therefore, the need for the establishment of an additional type of formal homecare services for the elderly exists. Design/Methodology/Approach: Although many positive effects of home elder care against institutional care are stressed in the literature, the results of many studies performed in recent years have indicated that accessibility of homecare for elderly in Slovenia remains scarce, and it is not equally accessible throughout the country. To mitigate this problem, a new organizational form called “elder homecare service provider” is indicated. The aim of the provider is to offer a variety of different services for the elderly (e.g. homemaking, social networking, transfer services, basic life needs, basic health services, etc.). The establishment of such an organization needs to be designed carefuly, while the unique characteristics and specific needs of the target population must be addressed to optimize desired outcomes. Results: The aim of the paper is to provide fundamental guidelines for the establishment of elder homecare service provider. All essential characteristics of such an organization are defined. To ensure an appropriate level of service quality, the primary focus is oriented towards the planning of personnel team capacity. For this purpose, the service provider was described using the stochastic queueing model, which enables service capacity optimization considering different performance measures. The usefulness of the model was illustrated with a numerical example, which has shown that the results obtained provide valuable information for decision support. Conclusion: The establishment of a homecare service provider network would have many positive effects on society in general. The quality of the everyday life of the elderly is expected to be improved considerably, particularly in the rural areas where a lack of institutional care support is reported. Guidelines proposed in the paper together with the quantitave model for planning of its optimal capacity provide useful information, which are especially relevant in the preliminary phase of the establishment of service providers.
Ključne besede: elderly, service provider, performance measures, capacity planning
Objavljeno: 01.09.2017; Ogledov: 57; Prenosov: 0
.pdf Polno besedilo (569,19 KB)

87.
Model of traffic access mode and railway station choice of suburban railway system in Slovenia
Gregor Rak, Marjan Lep, 2014, pregledni znanstveni članek

Opis: This article presents the establishment of a model of understanding the access mode and railway station choice of Slovenian passengers. Therefore, a model has been designed to predict the determination of existing decision making preferences of railway users about the access mode and railway station choice with a stated preference survey and face to face method. The target group in the survey were railway passengers in the suburban environment that use the rail for work and school purposes. The total number of respondents was 412. The survey showed that most passengers access the railway station with car (60,2%), by foot (26,2%), with public transport (bus – 8,3%) and with bike (5,3%). Average distance to the station is 4,9 km, average time of access is 10,5 min. Upon exit most passengers walk to the final destination (84,5%), use the public transport (bus – 14,1%), car (1,2%) or bike (0,2%). Average time from exit of the train to final destination is 13,1 min, average distance is 1,58 km.
Ključne besede: passenger transport, departure railway station choice, railway access mode choice
Objavljeno: 01.09.2017; Ogledov: 25; Prenosov: 0
.pdf Polno besedilo (538,93 KB)

88.
Zeta potencial PA 6
Robert Šoster, Nika Veronovski, Lidija Tušek, Karin Stana-Kleinschek, Simona Strnad, Volker Ribitsch, 2003, izvirni znanstveni članek

Opis: V raziskavi smo preučevali elektrokinetične lastnosti poliamida 6 v obliki (a) folije in (b) tekstilnega filamenta ob uporabi dveh merilnih celic. Merili smo potencial zaradi pretoka in iz tega določili zeta potencial (▫$\zeta$▫ v odvisnosti od pH vrednosti medija. Meritve na posameznem materialu smo preučevali s stališča ponovljivosti. S tem namenom smo opravili meritve na 10 preskušancih istega vzorca. Določili smo osnovne statistične pokazatelje ponovljivosti za ▫$\zeta$▫ pri pH 3 in 9 ter izoelektrično tocko. Metodo smo optimirali glede na čas nabrekanja v raztopini elektrolita pred meritvijo in maso materiala v cilindrični celici. Meritve v 0,001 M KCl na obeh vrstah materiala kljub različni nadmolekulski in površinski strukturi dobro sovpadajo. Krivulje ▫$\zeta$▫=▫$\zeta$▫(pH) imajo pričakovan potek. PA 6 kaže amfoterno naravo zaradi vsebnosti amino in karboksilnih skupin. V alkalnem mediju disociirajo karboksilne skupine, kar povzroči negativen ▫$\zeta$▫ (folija: (-32,9▫$\pm$▫ 1,6) mV, filament: (-35,2▫$\pm$▫2,0) mV pri pH 9). V kislem mediju kaže PA kationski značaj zaradi disociacije amino skupin (folija: (24,5▫$\pm$▫1,7) mV, filament: (15,1▫$\pm$▫1,1) mV pri pH 3). Izoelektrična točka, kjer je ▫$\zeta$▫ enak 0, se nahaja za folijo pri pH vrednosti 4,7▫$\pm$▫0,1, za filament pa pri 4,9▫$\pm$▫ 0,1.
Ključne besede: polimeri, poliamid 6, elektrokinetične lastnosti, potencial zaradi pretoka, zeta potencial, filament, folija
Objavljeno: 01.09.2017; Ogledov: 24; Prenosov: 0
.pdf Polno besedilo (420,18 KB)

89.
Vrednotenje toplotnih lastnosti tekstilij in njihovih kombinacij
Damjana Celcar, Jelka Geršak, Harriet Meinander, 2010, izvirni znanstveni članek

Opis: V prispevku je predstavljeno vrednotenje toplotnih lastnosti ploskih tekstilij in njihovih kombinacij, namenjenih za poslovna oblačila, ki je potekalo v dveh delih. V prvem delu so bile raziskane toplotne lastnosti ploskih tekstilij ovrednotene na različnih merilnih napravah, ki omogočajo merjenje prehoda toplote in/ali prehoda vodne pare skozi plosko tekstilijo, in sicer s pomočjo toplotne plošče ter merilnih naprav Thermo Labo II in Permetest. V tem delu raziskave so bile raziskane povezave med lastnostmi ploskih tekstilij oziroma odvisnosti med posameznimi parametri toplotnih lastnosti analiziranih ploskih tekstilij, izmerjenimi na različnih merilnih napravah ter odvisnosti med toplotnimi lastnostmi in debelino tekstilije. V drugem delu raziskave so bile raziskane toplotne lastnosti kombinacij posameznih ploskih tekstilij in sicer s pomočjo toplotnega cilindra s simulacijo znojenja, ki omogoča merjenje prehoda toplote in prehoda vodne pare skozi tekstilije ali kombinacijo tekstilij. Za ta namen je bil raziskan vpliv klimatskih razmer in stopnje znojenja na toplo-tne lastnosti posameznih kombinacij ploskih tekstilij. Raziskava je pokazala, da med parametri toplotnega upora, izmerjenega s toplotno ploščo, ter merilnima napravama Permetest in Thermo Labo II, obstajajo statistično pomembne korelacije, in da med toplotnim uporom, določenim iz kvocienta debeline in toplotne prevodnosti, dobljene z merilno napravo Thermo Labo II ter toplotnim uporom, dobljenim s toplotno ploščo in z merilno napravo Permetest prav tako obstaja korelacija. Potrjeno je, da se z naraščajočo debelino materiala vrednosti toplotnega upora in upora proti prehodu vodne pare ploskih tekstilij povečujejo. Hkrati je bilo ugotovljeno, da različne klimatske razmere in stopnje znojenja vplivajo na toplotne lastnosti kombinacij ploskih tekstilij. Ugotovljeno je bilo, da so toplotne lastnosti, tj. suhi in evaporativni toplotni tok ter sposobnost prehoda vodne pare odvisne od klimatskih razmer oziroma temperaturnega gradienta med površino cilindra in temperaturo zraka, in da se z različno stopnjo znojenja, vrednosti evaporativnega toplotnega toka, korigiranega toplotnega upora in sposobnosti prehoda vodne pare spremenijo.
Ključne besede: ploske tekstilije, toplotne lastnosti, toplotno udobje, toplotna plošča, Thermo Labo II, Permetest, toplotni cilinder s simulacijo znojenja
Objavljeno: 01.09.2017; Ogledov: 22; Prenosov: 2
.pdf Polno besedilo (544,95 KB)

90.
Vplivi in tveganja nanotehnologij in nanomaterialov na okolje in zdravje ljudi
Aljoša Košak, Marijana Lakić, Aleksandra Lobnik, 2015, izvirni znanstveni članek

Opis: Razvoj nanomaterialov in njihova uporaba v tekstilstvu sta velika priložnost za izdelavo novih izdelkov z različnimi funkcionalnimi in tehnološkimi lastnostmi, vendar razvoj poleg priložnosti pomeni tveganja za okolje in zdravje ljudi v obliki nanoonesnaževanja ter toksičnih vplivov na žive organizme. V prispevku so obravnavani okoljski vplivi in zdravstvena tveganja nanomaterialov, ki se najpogosteje uporabljajo v tekstilstvu, kot npr. nanodelci srebra ($Ag$), silicijevega dioksida ($SiO_2$), titanovega dioksida ($TiO_2$), cinkovega oksida ($ZnO$), aluminijevega oksida ($Al_2O_3$), aktivnega oglja, nanoglina in ogljikove nanocevke (CNT).
Ključne besede: nanotehnologija, nanomateriali, življenjski cikel izdelka, nanodelci srebra, nanodelci silicijevega dioksida, nanodelci titanovega dioksida, nanodelci cinkovega oksida, nanodelci aluminijevega oksida, nanoglina, ogljikove nanocevke, toksičnost
Objavljeno: 01.09.2017; Ogledov: 22; Prenosov: 3
.pdf Polno besedilo (513,85 KB)

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