bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance Analysis of Crystalline Silicon and CIGS Photovoltaic Modules in Outdoor Measurement
Authors: Luboń Wojciech , Pełka Grzegorz , Marszałek Konstanty , Małek Anna 
Published: January 2018

Abstract
The outdoor measurements (during two months experiment) of photovoltaic silicon and CIGS modules as well as simulation of energy production during the period experiment are presented in this paper. This paper offer comparison of construction and electrical characteristics of multicrystalline silicon based modules and CIGS based modules. The measuring system for PV modules efficiency research is shown. The nominal power of installed modules is 250 W for m-Si and 280 W for CIGS modules. The energy production in outdoor conditions at direct current side and alternating current side of each photovoltaic panel was measured. Each PV panel was also equipped with temperature sensor for screening panel temperature. The photovoltaic panels were connected to the electrical network with micro inverters. To determine the influence of irradiance at sunshine on power conversion efficiency of PV panels, the pyranometer was installed in the plane of the modules. Measurement of the instantaneous power and irradiance gave the information about the efficiency of a particular photovoltaic panels. In the paper all data from research installation were analysed to present the influence of solar cell technology on the power conversion efficiency. The results of energy production show that m-Si module produced more energy from square meter (30.9 kWh/m2) than CIGS module (28.0 kWh/m2). Thin film module shows the higher production per kWp than multicrystalline module: 217.3 kWh/kWp for CIGS and 201.9 kWh/kWp for m-Si. The energy production simulation (made by PV SOL software and outdoor measurements test are in the good agreement. Temperature power coefficient for the CIGS module is twice lower than for the multicrystalline silicon module: 0.56%/°C and 0.35%/°C for m-Si and CIGS modules, respectively. The obtained results revealed strong influence of irradiance and temperature on energy production by PV panels. Performed studies have a large field of potential application and could improve designing process of PV installation.
Small business life cycle: statics and dynamics (S&D) model
Authors: Matejun Marek , Mikoláš Zdeněk 
Published: January 2018

Abstract
The aim of the paper is the presentation of theoretical foundations and the structure of original, 8-stage statics and dynamics model in the small business life cycle. Based on theoretical considerations, two hypotheses concerning the impact of dynamic and static nature of the life-cycle stages on selected determinants and effects of SMEs’ development were formulated. The hypotheses were verified based on the results of the survey conducted on a sample of 1,741 SMEs from 22 countries of the European Union. The results indicate that companies in the dynamic life-cycle stages are run by more enterprising owners, operate in more promising markets with a higher potential and make greater use of market niches thus limiting the level of competition. At the same time, such companies are characterised by higher levels of flexibility and involvement in innovative activities, which translates into obtaining a significantly higher level of business performance, in the area of quantitative as well as qualitative results.
Enhancing the tourist attraction visiting process with gamification: key concepts
Authors: Swacha Jakub , Ittermann Robert 
Published: January 2018

Abstract
The main purpose of this paper is to describe key gamification techniques that can be applied to enhance the tourist attraction visiting process. The paper is based on the methodology of design patterns; particularly it adopts the definition and classification schemes originally proposed and developed in the context of gamification of work to specify gamification techniques related to various aspects of the tourist attraction visiting process. The main result is the selection of twelve gamification techniques for enhancing the tourist attraction visiting process, four for each of the three phases of the visiting process (before, during and after the visit). The paper shows that gamification techniques can be applied to enhance the tourist attraction visiting process. Implementation of the proposed gamification techniques is supposed to both improve visitor experience and give the tourist attraction managers a tool for boosting interest in less popular exhibitions and events.
Open Badges: A Systematic Review of Peer-Reviewed Published Literature (2011-2015)
Authors: Liyanagunawardena Tharindu R. , Scalzavara Sandra , Williams Shirley A. 
Published: January 2018

Abstract
Open badges are a digital representation of skills or accomplishments recorded in a visual symbol that is embedded with verifiable data and evidence. They are created following a defined open standard, so that they can be shared online. Open badges have gained popularity around the world in recent years and have become a standard feature of many learning management systems. This paper presents a systematic literature review of the published open badges literature from 2011 to 2015. Through database searches, searching the internet and chaining from known sources, 135 relevant peer-reviewed papers were identified from a corpus of 247 publications for this review. The authors believe this to be the first effort to systematically review literature relating to open badges. The review categorised publications while also providing quantitative analysis of publications according to publication type, year of publication and contributors. After assessing the literature suggestions for future research directions are presented, based on underrepresented areas.
Relations between BV*(q;α) and Λ*BV
p
classes of functions
Authors: Fathi Javad , Ahmadi Ledari Alireza 
Published: January 2018

Abstract
The aim of this paper is to establish the relation between the two classes of functions

BV
*

⁢

(
q
;
α
)

{\mathrm{BV}_{*}(q;\alpha)}

and

Λ
*

⁢

BV
p

{\Lambda_{*}\mathrm{BV}^{p}}

. It uses a new shorter proof and extends the results of Gogatishvili, Goginava and Tephnadze.
Energy efficiency analysis of the manipulation process by the industrial objects with the use of Bernoulli gripping devices
Authors: Savkiv Volodymyr , Mykhailyshyn Roman , Duchon Frantisek , Mikhalishin Mykhailo 
Published: January 2018

Abstract
The article deals with the topical issue of reducing energy consumption for transportation of industrial objects. The energy efficiency of the process of objects manipulation with the use of the orientation optimization method while gripping with the help of different methods has been studied. The analysis of the influence of the constituent parts of inertial forces, that affect the object of manipulation, on the necessary force characteristics and energy consumption of Bernoulli gripping device has been proposed. The economic efficiency of the use of the optimal orientation of Bernoulli gripping device while transporting the object of manipulation in comparison to the transportation without re-orientation has been proved.
Description of Safety Management Systems in Transportation
Authors: Kertis Tomáš , Procházková Dana 
Published: January 2018

AbstractThe work deals with analysis of different transportation domains in horizontal and vertical meaning. It looks for conformity in approaches and terms. It loans to concept of integral safety, i.e. a tool for ensuring the human security; it covers next engineering areas, for instance dependability management, functional safety, security of cyber-physical systems, technical and physical security, surveillance, occupational safety, safe place, human safety etc. Recent professional approaches of safety management and risk engineering are compared with current trends in transportation. It is clear that advanced professional procedures are needed for planned Smart Cities and Industry 4.0 in transportation domain practice; this work contribute to building the unified experts´ language from various transportation domains.
Manuel de Pedrolo: Literature as Intellectual Engagement
Authors: Trill Xavier Ferré 
Published: January 2018

Abstract
The article lays out the conceptual bases that Manuel Pedrolo developed –in the form of philosophical literature – in a section of his narrative. I describe the directionality of the author’s intellectual program with regard to the ‘double liberation' in detail. The interest of the work lies in exposing the inherent limitations of ‘literature for literature’ – with disregard of human nature – that can also be applied to any international literature, not only written in the fifties and sixties, but in the (ideologically) present time.
Determination of optimal doses of glyphosate for controlling weeds at several stages in southwestern Buenos Aires province (Argentina)
Authors: Bentivegna Diego Javier , Moyano Gisela Lorena , Daddario Juan Facundo Fabián , Tucat Guillermo 
Published: January 2018

AbstractEfficient weed management is essential for avoiding competition for water, light, and nutrient resources in semiarid zones. Chemical weed control with glyphosate was evaluated on perennial wall-rocket (Diplotaxis tenuifolia), artichoke thistle (Cynara cardunculus), slender wild oat (Avena barbata), and perennial ryegrass (Lolium perenne). Plants at early, middle and advanced vegetative stages were used in this study. Glyphosate potassium salt was applied at rates of 0.0675 (1/16x), 0.135 (1/8x), 0.27 (1/4x), 0.54 (1/2x), 1.08 (x) and 2.16 (2x) kg acid equivalent (ae) · ha−1. Glyphosate combined with 2,4-D amine salt was evaluated at rates of 1.08 kg ae · ha−1and 0.53 kg active ingredient (ai) · ha−1, respectively. The volume of the spray was 100 l · ha−1with 86 droplets · cm−2and a Volume Median Diameter (VMD) of 421.19 μm. In general, all the tested weeds were controlled with a quarter of the label rate. Three sizes of tested plants were controlled in a similar way at the same glyphosate dose rate. Moreover, the addition of 2,4-D to glyphosate did not produce an increase in the control of broadleaf weeds. The results showed that glyphosate was effective in controlling the tested weed species, including low application rates for all the growth stages in the southwestern Buenos Aires province.
Teachers’ Perceptions of Sustainability of the Social Emotional Learning Program in Latvia: A Focus Group Study
Authors: Martinsone Baiba , Vilcina Sabine 
Published: January 2018

Abstract
The aim of this study was to provide an initial evaluation of the sustainability of the first Social Emotional Learning (hereafter SEL) program in Latvia, which to date is still the only SEL program in our country. Initiated during the 2012/13 academic year, this program has already been implemented in 41 Latvian schools. In order to address the teachersí perceptions of program effectiveness and sustainability seven focus groups were organized. Thematic analysis of the focus group discussions pointed to various benefits of the program, including a general dissemination of SEL principles, and teachersí reflections on the importance of their own active role in the process of social and emotional learning. The value of the support of the school administration for program sustainability was also noted. The views expressed by the teachers were aligned with previous studies, indicating the importance of external support, the teachersí own understanding of SEL principles, and the willingness to be actively engaged in facilitating quality maintenance of the program.
The origin of upper Precambrian diamictites, northern Norway: a case study applicable to diamictites in general
Authors: Molén Mats O. 
Published: January 2018

Abstract
Upper Precambrian diamictites in Varangerfjorden (northern Norway) have been examined for evidence of origin, whether glaciogenic, gravity flow or polygenetic. Studies of geomorphology, sedimentology and surface microtextures on quartz sand grains are integrated to provide multiple pieces of evidence for the geological agents responsible for the origin of the diamictites. The documented sedimentary and erosional structures, formerly interpreted in a glaciogenic context (e.g., diamict structure, pavements and striations) have been reanalysed. Field and laboratory data demonstrate that, contrary to conclusions reached in many earlier studies, the diamictites and adjacent deposits did not originate from glaciogenic processes. Evidence from macrostructures may occasionally be equivocal or can be interpreted as representing reworked, glacially derived material. Evidence from surface microtextures, from outcrops which are believed to exhibit the most unequivocal signs for glaciation, display no imprint at all of glaciogenic processes, and a multicyclical origin of the deposits can be demonstrated. The geological context implies (and no geological data contradict this) an origin by gravity flows, possibly in a submarine fan environment. This reinterpretation of the diamictites in northern Norway may imply that the palaeoclimatological hypothesis of a deep frozen earth during parts of the Neoproterozoic has to be revised.
Assessing the influence of project management on quality during the early phases of construction projects
Authors: Ljevo Žanesa , Vukomanović Mladen , Džebo Suada 
Published: January 2018

Abstract
Although the quality of a process affects the quality of the end product, there is currently an insignificant amount of knowledge about the quality of project management (PM) processes that directly affect the quality of the delivered product (constructed building). This study presents a proposal for modeling the impact of the quality of the PM process on the quality of the constructed building. The quality of the PM process is represented by the main quality factors and product quality indicators. It presents the results of the interviews that were conducted and study cases that were analyzed in Bosnia and Herzegovina with a variety of project participants (with different managerial perspectives) in terms of the indicators of quality of the delivered product. All participants, regardless of managerial perspective, believe that the most important indicator of the quality of products for each phase of the project is “customer satisfaction in the end phase”, the measurement of which is different for each project phase that is presented. The results of the factor analysis of the definition and the planning phases show that 11 variables, namely, the quality factors of the PM process, can be grouped into three new factors, which is described as 66.61% (77.046%) of the basic set of variables.
Virtual reality as a new trend in mechanical and electrical engineering education
Authors: Kamińska Dorota , Sapiński Tomasz , Aitken Nicola , Rocca Andreas Della , Barańska Maja , Wietsma Remco 
Published: January 2018

Abstract
In their daily practice, academics frequently face lack of access to modern equipment and devices, which are currently in use on the market. Moreover, many students have problems with understanding issues connected to mechanical and electrical engineering due to the complexity, necessity of abstract thinking and the fact that those concepts are not fully tangible. Many studies indicate that virtual reality can be successfully used as a training tool in various domains, such as development, health-care, the military or school education. In this paper, an interactive training strategy for mechanical and electrical engineering education shall be proposed. The prototype of the software consists of a simple interface, meaning it is easy for comprehension and use. Additionally, the main part of the prototype allows the user to virtually manipulate a 3D object that should be analyzed and studied. Initial studies indicate that the use of virtual reality can contribute to improving the quality and efficiency of higher education, as well as qualifications, competencies and the skills of graduates, and increase their competitiveness in the labour market.
An accurate reactive power control study in virtual flux droop control
Authors: Wang Aimeng , Zhang Jia 
Published: January 2018

Abstract
This paper investigates the problem of reactive power sharing based on virtual flux droop method. Firstly, flux droop control method is derived, where complicated multiple feedback loops and parameter regulation are avoided. Then, the reasons for inaccurate reactive power sharing are theoretically analyzed. Further, a novel reactive power control scheme is proposed which consists of three parts: compensation control, voltage recovery control and flux droop control. Finally, the proposed reactive power control strategy is verified in a simplified microgrid model with two parallel DGs. The simulation results show that the proposed control scheme can achieve accurate reactive power sharing and zero deviation of voltage. Meanwhile, it has some advantages of simple control and excellent dynamic and static performance.
Research of influence of open-winding faults on properties of brushless permanent magnets motor
Authors: Bogusz Piotr , Korkosz Mariusz , Powrózek Adam , Prokop Jan , Wygonik Piotr 
Published: January 2018

Abstract
The paper presents an analysis of influence of selected fault states on properties of brushless DC motor with permanent magnets. The subject of study was a BLDC motor designed by the authors for unmanned aerial vehicle hybrid drive. Four parallel branches per each phase were provided in the discussed 3-phase motor. After open-winding fault in single or few parallel branches, a further operation of the motor can be continued. Waveforms of currents, voltages and electromagnetic torque were determined in discussed fault states based on the developed mathematical and simulation models. Laboratory test results concerning an influence of open-windings faults in parallel branches on properties of BLDC motor were presented.
Effect of Changes in Cycle Ergometer Settings on Bioelectrical Activity in Selected Muscles of the Lower Limbs
Authors: Staszkiewicz Robert , Kawulak Michał , Nosiadek Leszek , Omorczyk Jarosław , Nosiadek Andrzej 
Published: January 2018

Abstract

Introduction
. The aim of this study was to measure the duration of biopotentials in selected muscles of the lower limbs, evaluate the time of elevated bioelectrical activity in these muscles, and identify similarities and differences in electrical phenomena that occur in the muscles for various external settings of a cycle ergometer.

Material and methods
. The study examined 10 healthy people (5 women and 5 men) aged from 20 to 30 years. A cycle ergometer and EMG apparatus were used in the experiment. The bioelectrical activity of six muscles of the lower limbs (rectus femoris, vastus medialis, tibialis anterior, biceps femoris, gastrocnemius caput mediale, and gastrocnemius caput laterale) was recorded for four different settings of the cycle ergometer (variable saddle height and method of foot attachment to pedals). The EMG records were presented with reference to the bicycle crankset rotation cycle.

Conclusions
. The study found that changing the height of the saddle of the cycle ergometer and the use of toe clips in the pedals caused changes in bioelectrical activity in the muscles. The adjustment of saddle height affected the duration of potentials more noticeably than the use of toe clips. Furthermore, only one period of elevated electrical activity in the muscles of the lower limbs was found in the pedalling cycle. The longest time of the presence of action potentials was recorded for the m. gastrocnemius caput laterale, whereas the shortest time was observed in the m. vastus medialis.
Effects of Endurance Training on Functional Status of the Respiratory Muscles in Healthy Men
Authors: Klusiewicz Andrzej , Zubik Łukasz , Długołęcka Barbara , Charmas Małgorzata , Broniec Jerzy , Opaszowski Benedykt Henryk , Starczewski Michał , Ładyga Maria 
Published: January 2018

AbstractIntroduction. The aim of the study was to assess the influence of an 8-week endurance training program on the functional status of the respiratory muscles and breathing efficiency.Material and methods. Thirteen healthy, untrained, male students of Physical Education volunteered to participate in the study. Before and after the subjects completed the training program, they were subjected to anthropometric and spirometric measurements, and performed an incremental stress test. The spirometric measurements included maximal inspiratory pressure (PImax), active time, passive time, and diaphragm relaxation time. Measuring PImax is a simple method of evaluating the strength of the inspiratory muscles. The 8-week training program was performed on a rowing ergometer 3 times per week, using aerobic workloads.Results. The study did not confirm a significant improvement in the measured spirometric parameters following the training program. However, we observed a trend of increase in PImax values by 12 ± 21% of borderline after the training program and a significant correlation (p < 0.05) between the changes in PImax and those in VO2 max. Following the training there was also a significant reduction in the amount of body fat by 1.4 kg and an improvement of work capacity. The response of the respiratory system to exercise was also enhanced, as breathing efficiency improved (tidal volume increased in maximal exercise, while lung ventilation, the ventilatory equivalent for oxygen, and breathing frequency decreased in submaximal exercise).Conclusions. The findings of the study suggest that traditional endurance training which is implemented over a 8 weeks is not a sufficiently strong stimulus to cause a significant increase in the strength of the inspiratory muscles.
Iodine Deficiency in Latvia: Current Status and Need for National Recommendations
Authors: Konrāde Ilze , Kalere Ieva , Strēle Ieva , Makrecka-Kūka Marina , Veisa Vija , Gavars Didzis , Rezeberga Dace , Pīrāgs Valdis , Lejnieks Aivars , Gruntmanis Uģis , Neimane Lolita , Liepiņš Edgars , Dambrova Maija 
Published: January 2018

Abstract
In the absence of a mandatory salt iodisation programme, two nationwide cross-sectional cluster surveys revealed persisting iodine deficiency among Latvian schoolchildren during the spring season and a noteworthy iodine deficiency in pregnant women in Latvia; these deficiencies warrant intervention. The consequences of mild-to-moderate iodine deficiency during pregnancy and lactation can adversely affect foetal brain development. Data from a Latvian population survey revealed the consumption of approximately 100 μg of iodine per day through foods and iodised salt. Therefore, strategies to increase the consumption of iodine-containing products should be implemented, particularly for children. In addition, to meet the increased iodine requirement during pregnancy, pregnant women should take daily supplements containing 150 μg iodine from the earliest time possible. All women of childbearing age should be advised to increase their dietary iodine intake by using iodised table salt and iodine-rich products: seafood, milk and milk products. For women with pre-existing thyroid pathologies, the medical decision should be considered on a case-by-case basis. Urinary iodine concentration monitoring among schoolchildren and pregnant women and neonatal thyrotropin registry analysis every five years would be an appropriate strategy for maintaining iodine intake within the interval that prevents iodine deficiency disorders.