The Legacy of Martin Luther’s Sola Scriptura

Aleksandar S,Santrac 삼육대학교 신학연구소 2019 신학과 학문 Vol.27 No.-

This article deals with the ecumenical and postmodern legacy ofMartin Luther’s sola scriptura principle. His multifaceted and complex sola scriptura theology is defined through the concept of the authority of Scripture versus the Tradition of the church, his formulation of the broader principle of the Word of God, some basic elements of his hermeneutics, and the Christ-centeredness of the sola scriptura principle. Strategically, the ecumenical and postmodern relevance and efficiency of sola scriptura both in the church and society today cannot be properly understood without first articulating this principle of Scripture by examining both Luther’s original position and subsequent theological interpretations.

Mobile Public e-Government Cloud Services Platform

Aleksandar Karadimce 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.11

The mobile public e-Government cloud services platform solution will encompass new technologies, and through the Big Data concept for data collection and exchange it will enable innovative channels of communication and collaboration among different players. The major benefit of the cloud-based platform is the efficient execution of heavy computation algorithms in the cloud simply by using Big Data storage and processing platforms. This new approach will address the mismatch between labour demand and supply to make the services of the public employment agencies more efficient, more effective, user-friendly and personalized. The main focus is given on the positive impact of e-services for employability prospects of young unemployed people, those with disabilities, and older workers. The platform will facilitate the matching of people for job openings, and more specifically, the job search by people with special skill-profiles, including special needs or time requirements. It will provide a networking platform and information services to address socio-economic side-effects of labour market exclusion. The main purpose of the model of mobile public e-Government cloud services platform is to provide an integrated environment where public institutions will receive complete data analysis.

Crack propagation in flexural fatigue of concrete using rheological-dynamical theory

Aleksandar Pančić,Dragan D. Milašinović,Danica Goleš 사단법인 한국계산역학회 2021 Computers and Concrete, An International Journal Vol.27 No.1

The concrete fatigue analysis can be performed with the use of fracture mechanics. The fracture mechanics defines the fatigue crack propagation as the relationship of crack growth rate and stress intensity factor. In contrast to metal, the application of fracture mechanics to concrete is more complicated and therefore many authors have introduced empirical expressions using Paris law. The topic of this paper is development of a new prediction of fatigue crack propagation for concrete using rheological-dynamical analogy (RDA) and finite element method (FEM) in the frame of linear elastic fracture mechanics (LEFM). The static and cyclic fatigue three-point bending tests on notched beams are considered. Verification of the proposed approach was performed on the test results taken from the literature. The comparison between the theoretical model and experimental results indicates that the model proposed in this paper is valid to predict the crack propagation in flexural fatigue of concrete.

Optimal Scheduling of Utility Electric Vehicle Fleet Offering Ancillary Services

Aleksandar Janjic,Lazar Zoran Velimirovic 한국전자통신연구원 2015 ETRI Journal Vol.37 No.2

Vehicle-to-grid presents a mechanism to meet the key requirements of an electric power system, using electric vehicles (EVs) when they are parked. The most economic ancillary service is that of frequency regulation, which imposes some constraints regarding the period and duration of time the vehicles have to be connected to the grid. The majority of research explores the profitability of the aggregator, while the perspective of the EV fleet owner, in terms of their need for usage of their fleet, remains neglected. In this paper, the optimal allocation of available vehicles on a day-ahead basis using queuing theory and fuzzy multi-criteria methodology has been determined. The proposed methodology is illustrated on the daily scheduling of EVs in an electricity distribution company.

Pumped-Hydro Storages are Balancing Electric Energy Production of Wind and Solar Reducing Average Costs and Pollution

Aleksandar Gajic,Vladimir Stevanovic,Stan Pejovic 한국유체기계학회 2019 International journal of fluid machinery and syste Vol.12 No.1

The new world energy policy is influenced by climate changes, narrow range of operation of Thermal Power Plants, potential risks of Nuclear Power Plants and limited resources of oil, gas and coal. Taking into account that renewable energy, solar and wind power particularly are very dependent on the climate, Hydro Power takes a new role in energy systems. Electricity conversion and storage in periods of lower consumption and electricity production from the stored energy in periods of higher demand or reduced production, are crucial for the maintenance of stable and efficient electrical system. This requirement has especially strengthened nowadays due to the expansion of integration of new wind and solar plants. These renewable sources are characterized with inherent intermittent production both in daily periods and periods of several days, weeks or even months. A number of technologies might be considered for the electricity conversion and storage, but the only nature and high capacity available technology is based on the pumped storage plants. This article studies the potential of the pumped storage plants as the effective and economically competitive technology for the storage of wind, solar, run-of-river and other environmentally friendly energies. Nuclear and coal fired plants can change power output to achieve demand but only at the price of extremely high maintenance cost. In addition, natural gas generators contribute to climate change and pollution only slightly less than coal. The pumped storage method is the most common storage system in the electricity sector. It is traditionally dependent on natural conditions, usually making use of rivers or lakes. However, some innovative methods such as the use of the sea as the lower reservoir, or a proposal to use a surface reservoir as the upper reservoir and an underground reservoir as the lower have emerged. Analyses indicate that there is a strong economic incentive for further investment in pumped-storage installations when other hydro storages and sites are not available.

A new magnetorheological brake`s combined materials design approach

Aleksandar Poznic,Danijela Miloradovic,Anamarija Juhas 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.3

Increase of magnetic flux density intensity, in certain parts of a Magnetorheological (MR) brake, was researched in order to improve MR brake`s overall braking properties. This paper proposes a new combined materials approach. New approach achieved magnetic flux density path routing. To verify the effect, two MR brake prototypes: The conventional one and the combined materials one, have been designed, manufactured and tested. Both prototypes had the same geometry. The construction material’s magnetic properties had to be determined by measurements. To increase the overall braking torque, the combined materials MR brake prototype featured non-magnetic housing materials and has successfully yielded significantly larger overall braking torque compared to the conventional MR brake.

Functional and Environmental Advantage of Cleaning Ti5B1 Master Alloy

Aleksandar Mitrašinović,Miloš Tomić 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.3

One of the greatest environmental goals for the aluminum alloys industry is generating higher quality products by introducing cleaner input materials while maintaining low production costs. A typical dilemma for the master alloy producers is the cleanness level of the master alloy since insoluble inclusions could serve as inoculants during the solidification process. In this work, commercial Ti5B1 master alloy is used for grain refinement of Al7Si4Cu aluminum alloy and compared with the cleaned master alloy that contained a lower amount of residual refractory oxides and salts. Metallography analysis was used for grain size measurement while Computer Aided Cooling Curve Analysis was used for assessment of the undercooling and heat release values. In all instances, specimens treated with the cleaned master alloy showed smaller grains in the final structure and lower undercooling values. The difference in released heat between liquidus and recalescence temperatures was about 25% in specimens where added 0.66 wt% of cleaned master alloys compared to specimens where the commercial master alloys were added. Using cleaner Ti5B1 master alloy with a higher number of TiAl 3 and TiB 2 particles improves its grain refi nementefficiency and transmits fewer impurities in produced parts. Producing cleaner master alloy would be beneficial from economic and environmental aspects by increasing its value and service time of produced parts besides simplifying the recycling process at the end of parts life-cycle.

Suprahilar Control of Glissonean Pedicle in the Open Anatomic Liver Resections: A Single Centre Experience

Aleksandar Karamarkovic,Milos Bracanovic,Bojan Jovanovic,Sanja Tomanovic Vujadinovic Korean Society of Gastrointestinal Cancer 2016 Journal of digestive cancer reports Vol.4 No.2

Background: We evaluated technique of hepatic resections using suprahilar-extrafascial dissection of Glissonean pedicle with vascular stapling device for pedicle transection with intent to minimize operative time and blood loss. Methods: We analyzed the clinical records of 326 patients who underwent anatomic liver resection by suprahilar-extrafascial pedicle isolation with vascular stapling division technique. Results: The minor liver resections were associated with significantly shorter surgery duration (105.1±21.1 vs. 225.6±75.6) and transection time (40.1±14.5 vs. 96.3±55.2) than major hepatectomies (p<0.0001 for all). The mean blood loss was 350.8±100.5 mL in minor resection and 485.4±250.2 mL in major resection (p=0.001). The mean blood transfusion requirement was 400.8±109.5 mL for minor resections and 550.9±100.0 mL for major hepatectomy (p=0.072). There was no significant difference in morbidity and mortality between groups (p=0.980; p=0.945). Major as well as minor liver resection were oncology superior with no significant difference in the 5-year overall survival rates. Conclusion: Suprahilar-extrafascial dissection of Glissonean pedicle represents an effective and safe technique of liver resection. Presented approach allows early and easy ischemic delineation of appropriate liver territory to be removed with selective inflow vascular control. It is not time consuming and it is very useful in re-resection, as well as oncological reasonable.

Influence of the extrusion parameters on the physical properties of chickpea and barley extrudates

Aleksandar Yovchev,Andrea Stone,Shannon Hood-Niefer,Michael Nickerson 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.2

In this research, the effects of extrusion processing [exit-die temperature (120–150oC), moisture content (20–24% wet basis), and screw speed (260–340 rpm)] on the specific mechanical energy and physical properties (expansion ratio, bulk density, and hardness) of desi chickpea and hullless barley extrudates were estimated using response surface methodology. Exit-die temperature and feed moisture content, as well as the interaction between them were the factors that affected the product responses the most. Significant correlation was found between the hardness and bulk density (positive), hardness and expansion ratio (negative), and bulk density and expansion ratio (negative) for both chickpea and barley extrudates. Desirable characteristics (high expansion, low bulk density, and hardness) for chickpea were obtained at high exit-die temperature, relatively high moisture, and high screw speed. As for the barley extrudates, high exit-die temperature, low moisture, and moderate to high screw speed were identified as optimal.

A Comparative Study of Ni (II) Removal from Aqueous Solutions on Ca-Alginate Beads and Alginate-Impregnated Hemp Fibers

Aleksandar Zdujić,Katarina Trivunac,Biljana Pejić,Marija Vukčević,Mirjana Kostić,Milan Milivojević 한국섬유공학회 2021 Fibers and polymers Vol.22 No.1

Ca-alginate particles (CA) and alginate-impregnated hemp fibers (AH) (both, as prepared, dried, and rehydrated)were used as adsorbents for removal of Ni (II) ions from water. Adsorption was examined in the batch system andexperimentally obtained data were analyzed by both linear and nonlinear curve fitting using pseudo-first and pseudo-secondorderrate, as well as Langmuir, Freundlich, and Sips equations. The concentration of Ni (II) ions was measured by atomicabsorption spectrophotometry, while the Fourier transform infrared spectroscopy was used for characterization of adsorbentsurface, before and after the adsorption. Although all tested samples showed similar adsorption capacities of 12 mg/g, it wasfound that rehydration improves adsorption characteristics of AH and increases the removal efficiency above 90 %. Adsorption of Ni (II) ions can be sufficiently described by both kinetic models and Sips isotherm equation, and this relativelyfast process presumably occurs through the mechanism of physisorption and ion-exchange. The obtained results proved thatCa-alginate particles and alginate-impregnated hemp fibers have good potential to reduce nickel concentrations in a costeffectiveand efficient manner.