bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation about the presence of organochlorine pollutants in mussels from the Black Sea, Bulgaria
Authors: Georgieva Stanislava , Stancheva Mona , Makedonski Lubomir 
Published: June 2016

Abstract
The aim of this study was to investigate the presence of polychlorinated biphenyls (PCBs), organochlorine pesticides (HCB, DDT and its metabolites) and HCBD in mussels from Bulgarian Black Sea coast. Mussels (Mytilus galloprovincialis) are aquatic organisms which are immobile so that the concentration of pollutants should primarily be considered as an indication of local levels of organochlorine compounds. Samples were collected from three areas of Black Sea coast of Bulgaria in summer 2015.
The fifteen congeners of PCBs, HCB, HCBD, DDT and its metabolites DDE and DDD were performed by gas chromatography system with mass spectrometry detection. The metabolites DDE and DDD were found in all analyzed mussel samples, but PCBs were not detected in any sample. DDE concentrations were found in mussels from 1.09 to 1.63 ng/g wet weight. In mussel total DDT concentrations (2.14 ng/g ww) were found comparable to those in mussels, sampled in 2013 and 2014 (1.87 ng/g ww).
The levels of DDTs and polychlorinated biphenyls in mussels from the Black Sea were found comparable to levels measured in the same molluscs from neighbor seas - Mediterranean Sea and Adriatic Sea.
Nutritional evaluation of aquaculture mussels (M. galloprovincialis) from the Black Sea, Bulgaria
Authors: Merdzhanova Albena , Dobreva Diana A. , Georgieva Stanislava 
Published: June 2016

Abstract
In recent years black mussels are one of the most commercially important species from the Bulgarian Black Sea. The marine mollusks are valuable healthy food, low in calories and fats and high in proteins. They are a major dietary source of fat soluble pigments - astaxanthin, carotenoids and polyunsaturated fatty acids (PUFA). To our knowledge the information about the nutritional quality of mussels from the Bulgarian Black Sea waters, based on chemical composition, fat soluble pigments, cholesterol and PUFA content is very limited. The aim of the present study is to determine and compare protein, lipid, carbohydrate and energy values, fat soluble pigments, cholesterol and fatty acid composition in farmed mussels (Mytilus galloprovincialis) from the Bulgarian northern and southern parts of the Black Sea coast. The mussel samples were analyzed for lipids (Bligh & Dyer method), crude proteins (Kjeldahl method), carbohydrates and moistures according to the AOAC (1990) methods. Fatty acids were analyzed by the GC-MS system. Fat soluble pigments and cholesterol were analyzed simultaneously by the RP-HPLC system. Lipid and protein content were found to be higher in mussels from the northern region. In accordance with the Commission Regulation (EC) No. 116/2010 all analyzed mussel samples can be classified as high in protein and low in fats and carbohydrates. The amount of cholesterol, contained in all mussel populations is significantly low, while the omega-3 (n-3) is significantly higher than the omega-6 PUFA. A portion of 100 g edible tissue provides 0.500 g more of the required amount of eicosapentaenoic acid (20:5) and docosahexaenoic acid (22:6) n-3 PUFA according to EFSA (2012). It can be concluded that the studied mussel aquaculture in the Black Sea is beneficial food for the human health and it is advisable to be part of a proper or a preventive diet of Bulgarian consumers.
Influence of Lay Plan Solution in Fabric Efficiency and Consume in Cutting Section
Authors: Dumishllari Elmira , Guxho Genti 
Published: June 2016

Abstract
One cutting order may require several lies and markers to achieve optimal efficiency and selection of right Lay Plan is one of the major challenges in cutting section, in a way to lead in fabric economy and reduced costs. The main purpose of this paper is to determine the best solution of lay plan and its influence, in the cutting room, starting from the analysis of the lay indicators calculations. We have studied an order with 200 jackets, with specific sizes. Markers are made by Gemini CAD (Gemini Cut Plan and Gemini Nest Expert). From Gemini CAD, we have taken different solutions of lay plans and chose the three best of them (lay plans that have a smaller number of lies, plies etc.), and then, for three best solutions are calculated lay indicators. From this calculation, we have determined the best solution of lay plan. The order to study has 5 different fabrics, so the calculations are made for each of them, and in the end are combined, in a way to have conclusions for an order in general. Best solution of lay plans combination, resulted one which had a better weighted efficiency and a low lay consumption.
New records and observations of macroalgae and associated pathogens from the Falkland Islands, Patagonia and Tierra del Fuego
Authors: Mystikou Alexandra , Asensi Aldo O. , DeClerck Olivier , Müller Dieter G. , Peters Akira F. , Tsiamis Konstantinos , Fletcher Kyle I. , Westermeier Renato , Brickle Paul , van West Pieter , Küpper Frithjof C. 
Published: June 2016

Abstract
Subantarctic and Antarctic regions remain little explored with regards to their seaweed diversity. This study is based upon collections in the early 1970s and 2007–2013. It is supported by sequencing COI (mitochondrial cytochrome oxidase I) and reports new records for four species of brown algae (Hincksia granulosa, Hincksia sandriana, Myriotrichia clavaeformis, Syringoderma australe), four red algae (Erythrotrichia carnea, Paraglossum salicifolium, Phycodrys antarctica, Plumariopsis eatonii), one green alga (Chaetomorpha aerea) and of the oomycete Anisolpidium ectocarpii. A further four brown algae are reported at genus level and discussed (Cladostephus sp., Colpomenia sp., Dictyota sp., Punctaria sp.). Observations of the biology of three brown algal taxa (Cladothele decaisnei, Geminocarpus geminatus, Halopteris obovata) from the region are also reported here.
Learning from Experience: The Project Team is the Key
Authors: Terzieva Mariya , Morabito Vincenzo 
Published: June 2016

Abstract

Background: Learning from experience and knowledge management described in existing literature evidence that there are different practices that enable these processes, and that a distinction between implicit and explicit knowledge is essential for our analysis.

Objectives: The paper investigates through which project management practices organizations manage the two types of knowledge and at what level knowledge sharing and reuse is more commonly adopted.

Method/Approach: The research starts with existing research overview and analysis of preliminary results from initial interviews, and then it continues with a survey on selected knowledge management practices in order to identify which of them are mostly used by organizations.

Results/Findings: Results show the essential role of the project team; this finding is then further elaborated using knowledge from research presented in existing literature.

Conclusion: Project management enhances efficient knowledge management as on one hand, it includes the adoption of standardised and repetitive practises what enables specialization and knowledge consolidation. On the other hand, project management refers to unique initiatives that provide new knowledge and opportunities for learning. The project team in particular results to be a key factor for activating knowledge reuse.
The Influential Knowledge Factors of Companies’ Performance in Slovenia
Authors: Rašič Katja , Mulej Matjaž , Čančer Vesna 
Published: June 2016

Abstract

Background: Knowledge plays a crucial role in supporting the European Union model based on economic growth, social responsibility, and sustainable development. To improve companies’ performance, one must reflect on new forms of knowledge and develop new indicators to measure them.

Objectives: The goal of the paper is to investigate the impact of the selected factors of knowledge on companies’ performance in Slovenia.

Methods/Approach: A questionnaire was created and sent to small and medium-sized enterprises in Slovenia. The principle axis factoring method was used to identify the factors of knowledge and of companies’ performance, and a regression analysis was conducted to determine the influence of the selected knowledge factors on companies’ performance.

Results: The establishment of scientists’ collaboration with companies has a positive impact on companies’ performance, but the obstacles to the establishment of scientists’ collaboration with companies do not have any impact.

Conclusions: The results could be useful for governments and companies in the adoption of measures aimed at strengthening scientists’ collaboration with companies. Further research can be oriented toward the common synergy index (e.g., the knowledge triangle).
Profitability and Capital Structure: An Empirical Study of French and Hungarian Wine Producers in 2004-2013
Authors: Luptak Martin , Boda Daniel , Szucs Gabor 
Published: June 2016

Abstract

Background: Profitability of the Hungarian wine industry has been a focus of numerous research studies due to the centuries-old history and the recent changes.

Objectives: The aim of the study is to analyse the capital structure of the Hungarian and the French wine industries and demonstrate the benefits of the usage of an international company database.

Methods/Approach: First, the database and the applied methods are described and then the descriptive statistical analysis of the industry is presented. The two set hypotheses are aimed at testing the main contradiction between the pecking order and the trade-off theory, which is related to profitability and the usage of external funds.

Results: The analysis examines the differences between the funding policies applied in the two countries. This was carried out by means of a discriminant analysis, which indicates the financing characteristics of French and Hungarian wine producers. In order to confirm the results of the discriminant analysis we conducted a cluster analysis on the same sample where 3 out of 4 variables proved to be significant in classifying the two groups.

Conclusions: The main conclusion of the study is that the behaviour of the factors explaining the development of the capital structure differs significantly in the two examined countries.
Vendor Selection and Supply Quotas Determination by Using a New Multi-Objective Programming Method Based on Cooperative Game Theory
Authors: Perić Tunjo 
Published: June 2016

Abstract

Background: Vendor selection and supply quotas determination is one of the most important issues in the purchasing process in manufacturing. In many situations to solve this problem it is necessary to use the operations research methods.

Objectives: This paper proposes a new methodology for vendor selection and determination of supplied quotas. The work investigates the problem of flour purchase by a company that manufactures bakery products.

Methods/Approach: The problem is solved by using the model that combines a revised weighting method, and a multiple objective programming method based on game theory. The revised weighting method is used to determine the objective function coefficients, and a multiple objective programming method is used to select vendors and to determine supply quotas from the selected vendors. For selection of vendors and determination of quantities supplied by individual vendors three complex criteria are used: (1) purchasing costs, (2) product quality, and (3) vendor reliability.

Results: The proposed methodology has numerous strengths, such as an efficient reduction of complex criteria functions to simple ones and efficient using of a new multiple objective programming methods based on cooperative game theory.

Conclusions: The main advantage of the proposed approach is its efficiency and simplicity.
An ℓ-th root of a test configuration of exponent ℓ
Authors: Mabuchi Toshiki 
Published: June 2016

Abstract
Let (X, L) be a polarized algebraic manifold. Then for every test configuration μ = (X, L,Ψ) for
(X, L) of exponent ℓ, we obtain an ℓ-th root (κ, D) of μ and Gm-equivariant desingularizations ι : ^X → X and
η : ^X → Y, both isomorphic on^X \^X 0, such that

whereκ= (Y, Q, η) is a test configuration for (X, L) of exponent 1, and D is an effective Q-divisor on^X such
that ℓD is an integral divisor with support in the fiber X0. Then (κ, D) can be chosen in such a way that

where C1 and C2 are positive real constants independent of the choice of μ and ℓ. This plays an important
role in our forthcoming papers on the existence of constant scalar curvature Kähler metrics (cf. [6]) and also
on the compactified moduli space of test configurations (cf. [5],[7]).
Simulation of Induction Traction Drive with Supercapacitor Energy Storage System Test Bench
Authors: Stana Girts , Brazis Viesturs , Apse-Apsitis Peteris 
Published: June 2016

Abstract
The paper describes the application of supercapacitor energy storage system for induction traction drive test bench that replaces a real electric public transport for performing testing and researches. The suitability and usage of such bench for research purposes is explained and the importance of the development of software mathematical model for performing simulations to be done before physical implementation measures is reasoned. The working principle of the bench and applied components are described. A virtual model of the bench was built and simulations were performed using Matlab/Simulink software. The basic topology of the virtual bench model is described as well. The calculations of this work show the scaling of supercapacitor energy storage system by setting different limits of working voltage range in order to adjust them to test bench parameters, whereas the modelling compares two simulation cases – the application of less supercapacitors and the application of more supercapacitors with the same common rated voltage. The autonomous mode simulations were also performed. Simulation results are analyzed and recommendations for the application of the supercapacitor energy storage system, with respect to initial supercapacitor circuit voltage, are given.
Power Measurement and Data Logger with High-Resolution for Industrial DC-Grid Application
Authors: Apse-Apsitis Peteris , Senfelds Armands , Avotins Ansis , Paugurs Arturs , Prieditis Marcis 
Published: June 2016

Abstract
Power and energy measurement and monitoring is a key factor for many industries in terms of energy and cost efficiency evaluation. Due to trends of Smart Grid concept application in industrial environment, including decentralized DC-Grid implementation, for precise evaluation – faster and low-cost measurement equipment is needed. Manufacturing industry widely uses industrial robots that have dynamic load characteristics for which faster measurement equipment is needed.
This paper gives a brief description of the developed power measurement equipment, its structure and interconnection with industrial Profinet network. Further as a testing method steady state and dynamic loads are selected and analyzed. For testing, specially created industrial DC-Grid testing environment and equipment was used. Testing results show that the selected method and idea is working and is able to measure dynamic loads with high resolution. For other industrial load types there is a discussion going on about the issue of how detailed the resolution is needed in industrial SmartGrids, as energy forecast is a new trend in robotic industry and manufacturing planning.
The structure of the radiation balance on a sandy surface: case the Błędów desert, Silesian Upland
Authors: Caputa Zbigniew 
Published: June 2016

Abstract
Comprehensive environmental studies taking under consideration the structure of the radiation balance during the vegetation growing seasons of 2001 and 2002 were carried out on the open sandy surface of the area called the Błędów ‘desert’ located on Silesian Upland. The research in each site covered the composition of plant species, their age and height, the condition of the substratum, the composition and structure of the soil and the meteorological conditions with elements of the radiation balance. The article presents some part of the research on meteorological elements and their impact on ecosystem. Special attention was devoted to radiation conditions on the open sandy surface in the context of the formation of BSC (biological soil crust). Having presumed that the values obtained on the grassy surface constituted 100%, the values of radiation reflection measured on the open sandy surface were 185% higher and the values of net longwave radiation were 105% higher in day time and 137% in night time. Values of net radiation of about 63% lower were observed on the sandy surface during a typical sunny summer day. It was found that a strong irradiation of the sandy surface (26 MJ·m–2d–1) creates extremely difficult conditions for the initiation of the process of ecosystem formation (including BSC or plant succession). The elements of the radiation balance, net radiation, albedo and temperature of the open sandy surface were represented quantitatively. The test surfaces were classified based on the value of the albedo: group I with low albedo values, up to 0.15 (spore-bearing plants on a dark surface), including BSC; group II with mean values of the albedo from 0.16 to 0.24 (spore-bearing plants and seed on a dark grey surface); and group III with high albedo values, above 0.25 (plants growing on bare or loose sands).
Impact of secondary landscape structure on the presence of non-native plant species in the cadastral area of the Topoľčany town
Authors: Gális Marek , Galková Jela , Straňák Jozef 
Published: June 2016

Abstract
This study characterises an impact of secondary landscape structure on the introduction of non-native plant species during the years 2008 and 2010−2012. The field mapping was realised in the cadastral area of the Topoľčany town. The area of study consists of built-up area with surrounding agricultural land. During the period of our research, we identified the presence of total 55 non-native plant species, including 21 invasive, 11 casual and 23 naturalised. The highest dominance occurred in elements of ruderal vegetation without trees (22) and in the vegetation protection of aquatic dams (15). Several species were observed in a wide range of landscape elements. The occurrence in many structurally different types of habitats confirmed the ability of non-native species to tolerate a wide range of biotic and abiotic conditions.
Interviewer Effects on a Network-Size Filter Question
Authors: Josten Michael , Trappmann Mark 
Published: June 2016

Abstract
There is evidence that survey interviewers may be tempted to manipulate answers to filter questions in a way that minimizes the number of follow-up questions. This becomes relevant when ego-centered network data are collected. The reported network size has a huge impact on interview duration if multiple questions on each alter are triggered. We analyze interviewer effects on a network-size question in the mixed-mode survey “Panel Study ‘Labour Market and Social Security’” (PASS), where interviewers could skip up to 15 follow-up questions by generating small networks. Applying multilevel models, we find almost no interviewer effects in CATI mode, where interviewers are paid by the hour and frequently supervised. In CAPI, however, where interviewers are paid by case and no close supervision is possible, we find strong interviewer effects on network size. As the area-specific network size is known from telephone mode, where allocation to interviewers is random, interviewer and area effects can be separated. Furthermore, a difference-in-difference analysis reveals the negative effect of introducing the follow-up questions in Wave 3 on CAPI network size. Attempting to explain interviewer effects we neither find significant main effects of experience within a wave, nor significantly different slopes between interviewers.
The FEWS Index: Fixed Effects with a Window Splice
Authors: Krsinich Frances 
Published: June 2016

Abstract
This article describes the estimation of quality-adjusted price indexes from ‘big data’ such as scanner and online data when there is no available information on product characteristics for explicit quality adjustment using hedonic regression. The longitudinal information can be exploited to implicitly quality-adjust the price indexes. The fixed-effects (or ‘time-product dummy’) index is shown to be equivalent to a fully interacted time-dummy hedonic index based on all price-determining characteristics of the products, despite those characteristics not being observed. In production, this can be combined with a modified approach to splicing that incorporates the price movement across the full estimation window to reflect new products with one period’s lag without requiring revision. Empirical results for this fixed-effects window-splice (FEWS) index are presented for different data sources: three years of New Zealand consumer electronics scanner data from market-research company GfK; six years of United States supermarket scanner data from market-research company IRI; and 15 months of New Zealand consumer electronics daily online data from MIT’s Billion Prices Project.
“Do the Germans Really Work Six Weeks More than the French?” – Measuring Working Time with the Labour Force Survey in France and Germany
Authors: Körner Thomas , Wolff Loup 
Published: June 2016

Abstract
Measuring working time is not only an important objective of the EU Labour Force Survey (LFS), but also a highly demanding task in terms of methodology. Against the background of a recent debate on the comparability of working time estimates in France and Germany, this article presents a comparative assessment of the measurement of working time in the Labour Force Survey obtained in both countries. It focuses on the measurement of the hours actually worked, the key working-time concept for short-term economic analysis and the National Accounts. The contribution systematically analyses the differences in the measurement approaches used in France and Germany in order to identify the methodological effects that hinder comparability. It comes to the conclusion that the LFS overstates the difference in hours actually worked in France and Germany and identifies question comprehension, rounding, editing effects, as well as certain aspects of the sampling design, as crucial factors of a reliable measurement in particular of absences from work during the reference week. We recommend continuing the work started in the European Statistical System towards the development of a model questionnaire in order to improve cross-national harmonisation of key variables such as hours actually worked.
Random Walks on Directed Networks: Inference and Respondent-Driven Sampling
Authors: Malmros Jens , Masuda Naoki , Britton Tom 
Published: June 2016

Abstract
Respondent-driven sampling (RDS) is often used to estimate population properties (e.g., sexual risk behavior) in hard-to-reach populations. In RDS, already sampled individuals recruit population members to the sample from their social contacts in an efficient snowball-like sampling procedure. By assuming a Markov model for the recruitment of individuals, asymptotically unbiased estimates of population characteristics can be obtained. Current RDS estimation methodology assumes that the social network is undirected, that is, all edges are reciprocal. However, empirical social networks in general also include a substantial number of nonreciprocal edges. In this article, we develop an estimation method for RDS in populations connected by social networks that include reciprocal and nonreciprocal edges. We derive estimators of the selection probabilities of individuals as a function of the number of outgoing edges of sampled individuals. The proposed estimators are evaluated on artificial and empirical networks and are shown to generally perform better than existing estimators. This is the case in particular when the fraction of directed edges in the network is large.