bluuebunny/crossref_metadata_2025 huggingface dataset:
Does Customer Satisfaction Really Lead Company to Financial Success? A Review and Meta-analysis
Authors: Suharyanti Y. , Dewa D.M.R.T.
Published: September 2019

All the theories about market and marketing research, customer relationship management, and business in general, believe that customer satisfaction is one of the main factors for company financial success. However, a survey on 64 studies shows a wide variation of the correlation between customer satisfaction and financial performance. The correlation coefficients are varied from -0.256 to 0.899. This study applies a meta-analysis on those 64 studies’ findings to find the true correlation between customer satisfaction and financial performance. The analysis clusters the 64 studies based on year of research, business category observed, and geographical area of research. The result shows that the correlation between customer satisfaction and financial performance is relatively high (0.525) before 1990, becomes confusing (not-significantly correlated) in 1991-2000, increases (0.626) in 2001-2010, and decreases (0.595) after 2011. Based on business category, the two variables are not significantly correlated both in manufacturing industries and in service industries. The two variables are significantly correlated according to the studies conducted in Europe region (0.566) and Asia-Africa (0.657), but could not to be proven significantly correlated in USA region. The insights from the meta-analysis findings are: (1) the customer satisfaction role is change by time as well as the changes of industry environment, so that research on customer satisfaction will always be beneficial; (2) in individualist society like USA, further researches on customer behavior and culture are required to find more clear explanation about the role of customer satisfaction as well as other financial success factors, on the company performance.
Autonomization of public transport vehicles
Authors: Koniak Marcin , Czerpicki Andrzej
Published: September 2019

In this article has been presented issues of autonomization of public transport vehicles. In the first part is included classification of autonomization levels. On basics of this has been presented manufactor's strategy of facility development and softweare update, in order to take full advantage of the available opportunities, and increase the autonomization level. In the second part has been discussed driver assistance systems installed in modern vehicles. The final part contains characterization of V2X technology (Vehicle to everything), with vehicles without a driver as the target.
Safety of industrial automation systems
Authors: Ciucias Michał , Nowakowski Waldemar , Pietruszczak Daniel
Published: September 2019

In order to minimize the risks associated with the automation of industrial processes, it is necessary to unify standards of safety assessment. The aim of this article is the comparative analysis of safe-ty assessment methods of industrial automation systems. Authors presented two techniques of ensuring safety based on risk analysis, i.e. Performance Level (PL) and Safety Integrity Level (SIL) in relation to the applicable standards and regulations.
Analysis of the road safety assessment in the areas of road nodes - questionnaire surveys
Authors: Cybulska Ewelina , Rogowski Andrzej
Published: September 2019

Road junctions constitute one of the most important elements of road infrastructure. These are the special types of intersections, the construction of which results in an increase in the level of road safety in the areas of expressways and motorways. A wrongly designed or insufficiently marked and illuminated road junction may mislead participants and cause dangerous situations. The article presents author's surveys conducted among drivers on the subject of road safety assessment in the areas of road junctions.
SWOT analysis – a tool for determining the public transport network in Zamość
Authors: Repeć Renata , Rogowski Andrzej
Published: September 2019

The implementation of the obligations resulting from the Act on electromobility and alternative fuels forces local government units to pro-vide transport services in public collective transport with the use of low- and zero-emission buses. Zamość, as a city with more than 50,000 inhabitants, is obliged to purchase zero-emission rolling stock, which is connected with the analysis of network reorganization and the choice of shaping new transport bundles in the city. Despite the fact that MZK Zamość owns a fleet of low-emission vehicles (powered by CNG), it is obliged to purchase an appropriate number of zero-emission buses (e.g. e-buses). The article presents by means of SWOT analysis the strengths and weaknesses as well as opportunities and threats resulting from the change in the adaptation of the transport network of the city of Zamość to the legal conditions concerning electromobility and low-carbon buses.
Sources of noise in automotive vehicles. Studies of noise in road traffic in a selected locality and assessment of its impact on safety
Authors: Ambroszko Wojciech
Published: September 2019

The article discusses important sources of noise in automotive vehicles in relation to road safety. The work contains the results of re-search and analysis of noise levels at selected locations in Jelenia Góra. The study indicates the impact of noise level on safety.
Analysis of the application of the modular and special object handles in operation of machining
Authors: Barylski Adam
Published: September 2019

The article presents construction and assembly of designed special and modular handles. Handles for selected operations of lever machining and uniform body were analyzed. The work appoints costs of handles of the elements for the same type subjected to machining. The applied methodology can be used, inter alia, in the process of engineering education of technologists mechanics.
Computation of transition matrices of positive linear electrical circuits
Authors: Kaczorek Tadeusz
Published: September 2019

A method is proposed for calculation of transition matrices of positive electrical circuits. It is shown that if the transition matrix is presented as finite series of the Metzler matrix with real distinct eigenvalues then the coefficients of the series are nonnegative function of time. The method is applied to positive linear electrical circuits.
Evaluation of the load of the static load of the worker during washing the passenger car on a maintenance-free car wash
Authors: Kiełbasa Paweł , Dróżdż Tomasz , Tomasik Marcin , Lis Stanisław , Romańczyk Sabina
Published: September 2019

The purpose on the thesis is the analyses to determine the impact of the type of physical activity associated with the selected production process on the size and structure of the static load of the human musculoskeletal system by work. On the basis of a time-lapse analysis postural changes of employee was analyzed. The load on the musculoskeletal system of the employee was determined using the OWAS method. In all the cases of physical work analyzed, the positions of the individual elements of the body were imposed due to the character of the activities performed. The attitude of the employee's body position during the work can qualify for the first and second load categories. There is no need to make sudden changes at the workstation but it may be necessary in the future.
Verification of the application an open programming environment on a selected transport task
Authors: Łukasik Zbigniew , Górska Małgorzata
Published: September 2019

The article presents results of a study of possibilities to improve the implementation of a road vehicle tracking system previously developed at WTiE UTH Rad. Consequent application of the object-oriented programming paradigm is a key requirement of the task. An intermediate aim of the research is the assessment of available programming environments in the context of scientific problems in the field of transport.
Analysis of the performance of a new type of rotorcraft
Authors: Łusiak Tomasz , Witczak Radosław , Małek Arkadiusz
Published: September 2019

The article analyses the performance of the newly designed rotorcraft. A new concept for the equipment and use of rotorcraft for transport purposes was also presented. The work focuses on the use of gyroplanes for these purposes as a special type of rotorcraft with specific properties. The initial aircraft design developed and described includes structural assumptions, technological solutions, cabin / cargo ergonomics, economy and operational safety. Particular attention has been paid to rotorcraft equipment depending on which version it is to be configured to. The work also includes the design of the initial geometry of the rotorcraft. A solid showing the formulated assumptions that will be used for numerical analysis is presented. On its basis, an approximate analysis was made of the determination of basic performance and mass distribution depending on the equipment version. In addition, the method of numerical analysis of rotorcraft body and its results together with their development is presented. The results of numerical simulation were analyzed and conclusions regarding the correctness of gyroplanes for transport purposes were formulated.
The use of biogas as a biofuel for powering biogas, ecology, renewable Energy sources
Authors: Niekurzak Mariusz , Kubińska-Jabcoń Ewa
Published: September 2019

Energy security, ending resources of fossil energy sources, increase in conventional fuel prices, as well as dependence on imported fuels, have an impact on the need to search for new energy sources. One of the appropriate solutions to this problem is the implementation of biogas as a renewable fuel for transport. Biogas is usually used to generate heat or electricity, but after meeting certain quality requirements, it can also be used as a biofuel for powering mechanical vehicles. The article presents the current state of development of the biogas industry in Poland and defined the prospects for its development.
Study of the electric starter characteristics
Authors: Pszczółkowski Józef
Published: September 2019

The article describes the principle of operation of the electric starter of the starting system of the internal combustion engine. Basic processes and dependencies were described, and the characteristics of the starter's work were discussed. The station for the starter testing, allowing the examination of its characteristics and technical condition when powered by a battery and braking by means of an electro-spin and friction brake, was characterized. The station also allows testing the battery operation characteristics in the conditions of the starter power supply at its constant load. The results of tests of the functioning of the starting system and its components, the battery and the starter in the stationary conditions and while driving the engine crank-shaft are presented. The possibilities of using the crankshaft driving signals as diagnostic signals of the state of the battery, starter and combustion engine are indicated. The signals recorded while driving the engine crankshaft by the starter were discussed.
Identification of the electric starting system dynamic features
Authors: Pszczółkowski Józef
Published: September 2019

The article describes the starting systems of combustion engines and the conditions of their operation. Traditional stationary characteristics of the acid battery and the electric starter were discussed. Structural models of functional components of the starter system: battery and starter are presented as classic electrical circuits with typical RLC elements. The equations of structural components operation in dynamic conditions were formulated and their solutions and characteristics were presented. The results of tests of the functioning of the starting system and its components, battery and starter in the test stand conditions and while driving the crankshaft of the engine, showing the behaviour and the course of work parameters under dynamic conditions are presented.
Trends of changes of flight data recorders in the field of their utilization
Authors: Kaleta Ryszard , Niczyj Janusz , Winiarski Ryszard
Published: September 2019

In the article were described the possible directions of further development of the flight data recording systems installed on aircraft. This was done based on the analysis of the course of development of on-board aircraft recorders, the evolution of the attitude to recording parameters during the flight and the use of collected data with the factors of the changes. The analysis was made based on the experience of experts of the Air Force Institute of Technology in developing recorders and software analyzing the collected data and share in the utilization of this data recorded in the on-board recorders built on aircraft operating in the Air Forces.
Strategies for building customer loyalty in the recreational services market
Authors: Łukasik Zbigniew , Krajewska Renata , Ferensztajn-Galardos Ewa , Pętelska Karolina
Published: September 2019

Nowadays, the quality of customer service is extremely important. Every company can gain a lot from the recommendations of regular customers and stand out from the competition. In the recreational services market, customer service plays an important role in terms of building loyalty. It helps to strengthen trust and get to know the customer more closely, which makes it easier to adapt to their needs and to meet their requirements. The article analyses the factors that help to build customer loyalty on the recreational services market. The results of surveys conducted among the customers of the fitness club, which concerned the evaluation of the service and offer of the club, were presented.
Services as a determinant of logistic design
Authors: Smyk Stanisław
Published: September 2019

The article presents the results of research reflecting the impact of the properties of logistic services on logistic design, where the changes of these properties over time and the resulting necessity of permanent development of logistic projects have been exposed. The issues described in this way are described in four chapters: the properties of modern logistic services; the specifics of logistics design; logistic chain as a set of premises for logistic design; logistic outsourcing project and its practical consequences. The summary contains final conclusions and author's recommendations referring to the utilitarian value of the obtained research results.
Analysis of the current state of rail passenger transport in Podkarpackie voivodship
Authors: Węgrzyn Mateusz , Szkoda Maciej
Published: September 2019

The article presents an analysis of the analysis of the current state of regional rail passenger transport services provided in the Podkarpackie voivodship. An analysis was made of the transport services currently provided, the current technical condition of the rail-way infrastructure and the characteristics of the rolling stock in service.
The structure and operation of selected airports in Poland
Authors: Zielińska Edyta
Published: September 2019

Selected elements of the air transport infrastructure have been dis-cussed in the article. Basic zones of airports and terminals have been characterised. The article also explains why identification of airports is important and how these types of structures can be classified. An analysis of transport services delivered in 2016-2017 at Polish airports was conducted, the most important airports, as for the number of passengers served in our country, were mentioned as well as the most popular carriers providing the transport of people by means of airplanes were presented.
Load distribution plan for a 2-axle freight wagon
Authors: Bomba Ignacy
Published: September 2019

This article presents a procedure for determining load distribution plan of the wagon. It was made model wagon and on the basis determined equations describing the dependence of the weight load on the position of its center of gravity. The correctness of the model and equations were verified for selected wagon, the results confirmed the accuracy of the proposed procedure.
The energy needs of Poland in relation to the domestic market of liquid natural gas
Authors: Chłopińska Ewelina , Bajko Artur , Autzen Alexander
Published: September 2019

The article discusses the aspect of the demand, satisfaction and consumption of energy raw material which is natural gas in liquefied form in Poland. In the first part of the work the gas market was recycled referring to the national economy. Subsequently, energy carriers used in Poland are described and factors determining the use of this raw material are presented. The energy needs of the country with respect to the gas market were further defined.
Location of the city bike station as an element of shaping the communication policy in cities
Authors: Dębowska-Mróz Marzenna , Lis Piotr , Pawłowski Sebastian
Published: September 2019

Efficient implementation of displacements in cities requires, on the one hand, understanding in terms of transport needs, time of their formation, frequency, spatial extent (determining spatial relations) and, on the other hand, proper linking of all available methods of solving problems related to communication efficiency of urban transport systems. In recent years, the approach to the preferred forms of displacement in cities has changed. More and more often, residents use bicycles to implement everyday displacements. An important role in changing the approach to the method of displacement is played by the popularity and development of city bike systems. The article presents the results of research carried out on the occasion of social consultations regarding Radom Municipal Bike and the expected changes regarding the development of bicycle infrastructure in Ra-dom. The detailed characteristics of selected Radomski Rower Miejski stations in Radom were also presented.
Portada del dossier. Psicología y música. Comunicación, enacción y emoción
Authors: RevPsi UNLP
Published: September 2019

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Hubungan Parameter Koagulasi dengan Tipe, Ukuran, dan Jumlah Perdarahan pada Operasi Tumor Otak Supratentorial
Authors: Sugiyanto Endy , Bisri Dewi Yulianti
Published: September 2019

Latar Belakang dan Tujuan: Tumor otak memiliki angka kejadian 3,8-5,5% dari semua kasus tumor di Indonesia. Kebanyakan kasus tumor otak mengalami hiperkoagulasi, meskipun terdapat pengecualian pada beberapa kasus. Tujuan penelitian untuk mengetahui hubungan koagulopati dengan tipe, ukuran, dan jumlah perdarahan pada operasi tumor otak supratentorialSubyek dan Metode: Penelitian observasional analitik pada 30 pasien dengan rancangan cross-sectional pengukuran berulang untuk menganalisis hubungan antara koagulopati dengan tipe, ukuran, dan perdarahan tumor otak. Pengambilan sampel penelitian dilakukan secara consecutive samplingHasil: Terdapat 17 orang pasien dengan meningioma, 2 orang pasien dengan oligodendroglioma, 3 orang pasien dengan metastase dan 8 orang dengan tumor lain. Rata-rata bleeding time, clotting time, protrombin time (PT), dan activated partial thromboplastin time (APTT) preoperatif, 2 jam dan 6 jam post operatif berada dalam rentang nilai normal. Ditemukan penurunan yang konstan pada data APTT. Terdapat hubungan negatif yang signifikan antara ukuran tumor dengan bleeding time preoperatif serta hubungan yang signifikan antara jumlah pendarahan dengan APTT preoperatif.Simpulan: Pasien tumor otak mungkin mengalami kondisi hiperkoagulasi dari hasil pemeriksaan faktor koagulasi sederhana, terdapat hubungan negatif antara ukuran tumor dan bleeding time sehingga semakin besar ukuran tumor semakin besar juga risiko hiperkoagulasi yang mungkin dialami pasien. Correlation between Coagulation Parameter and Type, Size, and Blood Loss in Supratentorial Brain Tumor SurgeryAbstractBackground and Objective: The incidence rate of brain tumor 3.8-5.5% of all tumor cases in Indonesia. Most of brain tumor patients experience hypercoagulation, although there are exception in some cases. The purpose of this study to know the relationship between coagulopathy and brain tumor supratentorial type, size, and number of bleeding on operation.Subject and Methods: This is an observational analytical cross-sectional design for 30 patient to analyze correlation between coagulopathy and brain tumor type, size, and bleeding. The sampling methods were consecutive samplingResult: There were 17 patients with meningioma, 2 patients with oligodendroglioma, 3 patients with metastasis and 8 patients with other type of tumor. The average of bleeding time, clotting time, protrombin time (PT), dan activated partial thromboplastin time (APTT) in preoperative, 2 hours and 6 hours were normal. There were constant decline of APTT. Negative correlation between tumor size and preoperative bleeding time and significant correlation between amount of bleeding and preoperative APTT were also found.Conclusion: From simple coagulation factor test result, it is very like for a brain tumor patient to experience hypercoagulative state, a negative correlation between tumor size and bleeding time, meaning the bigger the tumor size, the higer hypercoagulation risk possesed by the patient.
Division And Combination In Linear Algebra
Authors: Fang Liang , Chena Rui
Published: September 2019

In this paper, the relationship between matrix operation, linear equations, linear representation of vector groups and linear correlation is discussed, and the idea of division and combination in linear algebra is discussed to help learners understand the connections between various knowledge points of linear algebra from multiple angles, deep levels, and high dimensions.
Construção de brinquedos nas aulas de educação física: educação ambiental
Authors: Galindo Vinicius Aparecido , Silva Cinthia Lopes da
Published: September 2019

O objetivo deste texto é analisar os significados do brincar e da construção de brinquedos para crianças do Ensino Fundamental em uma situação planejada de oficina-aula de construção de brinquedos com materiais recicláveis, em uma perspectiva cultural articulada com a Educação Física Plural em interface com a educação ambiental. As crianças, ao serem incentivadas ao consumo de produtos que incluem os brinquedos, os jogos e objetos eletrônicos, podem não ter a oportunidade de refletir sobre eles tanto quanto ao construir brinquedos, criar novas maneiras de brincar no seu “tempo livre” e se conscientizar sobre questões relacionadas ao meio ambiente (consumo, reciclagem, preservação). Neste estudo, realizou-se pesquisa bibliográfica e de campo, de tipo participante, constituindo-se em uma investigação de abordagem qualitativa. A proposta pedagógica do professor, oficina-aula, teve como estratégia a participação das crianças na dinâmica dessas atividades diversificadas, aguçando a curiosidade e o interesse de todos. Para a realização dessas oficinas-aulas foram utilizados materiais recicláveis como matéria-prima na produção dos brinquedos. Construir e brincar envolve cooperação, criatividade, preservação, reflexão e habilidades motoras, tão importantes para a formação do cidadão. Conclui-se que as crianças gostaram de brincar pelo fato de serem brinquedos construídos com materiais recicláveis. Além disso, as atividades estimularam a conscientização sobre a valorização do meio ambiente.

Palavras chave: Educação Física escolar. Educação Ambiental. Construção de Brinquedos. Ensino Fundamental I.
Effectiveness Evaluation of Use of Various Protein Feeds for Broiler Chicken Feeding
Authors: Milczarek Anna , Osek Maria
Published: September 2019

The purpose of this paper was to assess the suitability of various protein feeds in broiler chicken feeding. The study covered 160 birds split into 5 equipotent groups (SBM, EFFS, RFFS, EL, DDGS). Four protein feeds were an experimental factor: extruded full-fat soybean (EFFS group), raw full-fat soybean (RFFS group), extruded lupine (EL group) and distillers dried grains with solubles (DDGS group) that were added to starter rations in an amount replacing 30%, and in grower and finisher rations 50% of extracted soybean meal protein. Results showed that after replacing an identical amount of extracted soybean meal protein with protein from extruded soybean or DDGS in chicken rations, the final body weight and feed conversion ratio were similar to those of birds from the control group. Deterioration (P≤0.01) in the above-mentioned parameters was observed for chickens fed with rations containing raw soybean or extruded lupine. Birds that were given rations containing raw soybean (RFFS group) were characterized by the lowest dressing percentage, and, compared to the control group, the difference was significant (P≤0.01). The type of protein feed contained in the rations did not affect the musculature of chickens, however it did impact their fat deposition. Fat deposition was the lowest in birds from RFFS and DDGS groups that reached the lowest final body weight. Microscopic images of all examined livers showed a normal histological structure. The results of the studies carried out provide a basis for recommending the use of extruded full-fat soybean or DDGS in broiler chicken rations as partial substitutes for extracted soybean meal protein.
The Effect of Addition of Probiotic Bacteria (Bacillus Subtilis or Enterococcus faecium) or Phytobiotic Containing Cinnamon Oil to Drinking Water on the Health and Performance of Broiler Chickens
Authors: Krauze Magdalena , Abramowicz Katarzyna , Ognik Katarzyna
Published: September 2019

The aim of the study was to test whether the use of probiotic bacteria Bacillus subtilis or Enterococcus faecium or a phytobiotic containing cinnamon oil can improve the metabolic parameters, immune status, gut microbiota and histology, and growth performance of broiler chickens. The experiment was carried out on 560 one-day-old male Ross 308 broiler chickens raised until the age of 42 days. The broiler chickens were assigned to 4 experimental groups of 140 birds each (7 replications of 20 individuals each). The control group (Control) did not receive additives. A probiotic preparation containing live bacterial cultures of Enterococcus faecium (EF, in the amount of 0.25 g/l) or Bacillus subtilis (BS, 0.25 g/l) or a phytobiotic preparation containing cinnamon oil (OC, 0.25 ml/l) was administered to the broiler chickens with their drinking water throughout the rearing period. The most important results indicate that the use of BS and OC resulted in: a significant (P≤0.05) increase in the level of ferric reducing ability of plasma (FRAP), high-density cholesterol (HDL) and glutathione (GSH + GSSH) and a significant (P≤0.05) decrease in the level of malondialdehyde (MDA), lipid hydroperoxides (LOOH), total cholesterol (TC), triacylglycerols (TAG), nonesterified fatty acids (NEFA) and interleukin 6 (IL-6), a ratio of heterophils : leukocytes (H:L) and alkaline phosphatase (ALP) activity, alanine aminotransferase (ALT), acidic phosphatase (AC) and creatinine kinase (CK), relative to the C group. In the blood of broiler chickens from the OC treatment, aspartate aminotransferase (AST), lactate dehydrogenase activity and 3-hydroxy-butyrate dehydrogenase (HBDH) significantly (P≤0.05) decreased in relation to the C group, and in broiler chickens from EF and BS treatments there was an increase (P≤0.05) in haemoglobin (Hb) content. Compared with group C, in the broiler chickens’ nutritional content from EF, BS and OC treatments, the total number of coliforms and number of fungi significantly (P≤0.05) dropped and the number of aerobic bacteria increased (P≤0.05) in the length of the villus and the depth of the crypt. It has been found that Bacillus subtilis, Enterococcus faecium and phytobiotic containing cinnamon oil can improve the microbiological and histological appearance of broiler chicken intestine. The addition of probiotic bacteria Bacillus subtilis or phytobiotic containing cinnamon oil to drinking water is more preferable than Enterococcus faecium regarding stimulation of the immune system, blood redox status parameters, parameters of metabolic changes and the gut microbiome and morphometry.
Miocene quartz sands redeposited on subaqueous and alluvial fans during the Saalian: Interpretation of the depositional scenario at Ujście, western Poland
Authors: Mleczak Mateusz , Pisarska-Jamroży Małgorzata
Published: September 2019

The 14-m-thick sandy succession at Ujście in western Poland formed during the Odranian stadial of the Saalian glaciation, is exceptional in being very well sorted, almost mono-fractional (fine-grained sands) and mono-mineral (mainly quartz grains) and in lacking Scandinavian erratics. The lower sequence (5 metres in thickness) consists of three stacked packages of clinoforms (inclined cross-stratified sands) and is interpreted as having been deposited on a subaqueous fan in a shallow lake during two phases of rising water levels. The upper sand (9 metres in thickness) with (sub) horizontal stratification was redeposited on a subaerial alluvial fan. Distinctive distributary channels that occur in the uppermost part of the subaqueous fan and in the lowermost portion of the alluvial fan may indicate a change in sedimentation style from subaqueous to subaerial. Moreover, the subaerial position of the fan supports the presence of ice-wedge casts that developed under periglacial conditions in the upper part of alluvial fan. The results of granulo-metric analysis, rounding and frosting of grains and mineral analysis indicate that the sands are derived from Gorzów Formation of Early Miocene age. The only feasible explanation is that the 14-m-thick unit must have been redeposited during the Saalian glaciation.
New interpretation of the provenance of crystalline material from Oligocene flysch deposits of the Skole Nappe, Poland: evidence from heavy minerals and clasts in the Nowy Borek section
Authors: Salata Dorota , Uchman Alfred
Published: September 2019

The Futoma Member (Oligocene, Rupelian) of the Menilite Formation is present only in the northern part of the Skole Nappe. Some diatomitic layers of this member in the Nowy Borek section contain coarse-grained detrital material composed of a variety of metamorphic, volcanic and sedimentary rock fragments. The material derives from primary and secondary sources. Most abundant are debris of metamorphic rocks, mostly gneisses and mica schists. The metamorphic origin of these rocks is confirmed by the composition of heavy mineral assemblages and garnet chemistry. These rocks could have been transported from a local source located close to the margin of the Skole Basin or within that basin. The volcanic rocks reflect Paleogene volcanic activity that was widespread in the Carpathian region. Cherts, which could have been subjected to synsedimentary erosion, may have been derived from the older portions of the same formation.
Gas Combustion Efficiency Enhancement: Application Study of Intense Elestrostatic Field
Authors: Krickis O. , Zeltins N.
Published: September 2019

A number of international, European Union and Latvian legislative acts have been developed, which regulate the efficiency of gas combustion plants and greenhouse gas emissions in the atmosphere. These legislative acts require the development of new scientifically efficient methods for gas optimal combustion with a minor impact on the environment. In order to achieve such a goal, different methods can be used, but the most efficient is an intensive electrostatic field application to control combustion and harmful emission formation in premixed flames. In the framework of the current study, the authors developed a hybrid burner, which allowed generating an intensive electrostatic field with intensity of more than 1000 kV/m. The study also investigated the impact of such a field on the formation of harmful emissions, including CO2 and flue gas temperature. The empirical results showed that an intensive DC electrostatic field generated inside of the burner had an impact on the flame shape, CO2, NOx emissions and flue gas temperature. In its turn, by applying an intensive pulsating electrostatic field (multivariable experiment) it was possible to achieve the reduction in NOx, CO emissions with a simultaneous increase in flue gas temperature, which was related to combustion process efficiency enhancement.
Vascular Endothelial Growth Factor (VEGF) in Abdominal Fluid in Dogs with Oncological and Non-Oncological Diseases
Authors: Hristov Tsanko
Published: September 2019

The vascular endothelial growth factor (VEGF) is a multifunctional cytokine stimulating the growth of vascular endothelial cells, survival and proliferation, inhibiting apoptosis. It is one of the most potent stimulants of vascular permeability. VEGF is found at high levels in inflammatory and tumour-associated pleural and abdominal effusions and is involved in their occurrence. In the present study, the blood plasma and abdominal fluid VEGF levels were assayed in thirty-one client-owned dogs with neoplastic and non-neoplastic diseases by means of enzyme-linked immunosorbent assay (ELISA). The VEGF concentration in abdominal fluid of dogs (n=6) with ascites was 190.70±34.35 pg/ml, in dogs (n=6) with peritonitis: 1449.81±365.42 pg/ml and in dogs (n=9) with tumour-associated effusion: 1993.13±202.56 pg/ml. Blood plasma VEGF of healthy dogs (control group, n=10) was 36.79±5.72 pg/ml, in dogs with ascites: 57.92±2.88 pg/ml, in dogs with peritonitis: 76.98±7.24 pg/ml and in dogs with tumour-associated effusion: 173.50±40.9 pg/ml. There were substantial differences between blood plasma and abdominal fluid VEGF levels.
Computational equation discovery of relationships between container ship fuel consumption and hull and propeller fouling phenomena
Authors: Cepowski Tomasz , Drozd Andrzej
Published: September 2019

Nowadays, when we try to automatize all activities, there is a growing demand for energy in all forms. Increasingly we reach for new energy sources that can be problematic to store or to transport, owing to their toxicity or explosive propensity. The article examines the issues of determining danger zones occurring as a result of liquefied natural gas (LNG) release. The range of danger zones caused through LNG release depends on a multitude of factors. The basic parameter that needs to be considered is a type of the released substance as well as the manner of its release. The range of a danger zone is determined by, inter alia, the concentration of a released substance and the atmospheric conditions existing at the time when depressurization occurs. The article analyses the problem of the range of danger zones in a function of wind speed and surface roughness with a defined value of Pasquill stability for various LNG types, starting with pure methane, and ending with the so-called LNG-heavy. The difficulty of the task becomes more complicated when the analysed surface over which a depressurization incident takes place involves water. The problem deepens even further when the analysed substance possesses explosive properties. Then, apart from regular substance concentration, upper and lower flammability limit ought to be considered. Calculations were conducted with DNV-Phast software, version 7.11.
Analysis of selected technologies of precious metal recovery processes
Authors: Sitko Jacek
Published: September 2019

The article presents the technologies of obtaining precious metals as a byproduct in the processing of copper concentrates in KGHM POLSKA MIEDŹ SA and in the processing of zinc and lead concentrates in Huta Cynku “MIASTECZKO ŚLĄSKIE”. Discussed technologies for recovery of silver from secondary raw materials such as: used silver catalysts, scrapped electronic devices, defective transistors, scrap of silver-plated glasses, used solutions used for processing photosensitive materials are discussed. Jewellery and tableware and technical coatings in electronics and electrical engineering. The high reflectivity of the light rays from the silver surface was used in the production of special reflectors and mirrors, and chemical resistance in the construction of apparatus (such as equipment resistant to molten hydroxide alkali metals).
Comparative analysis of soil magnetic susceptibility and concentration of rare earth elements in soil of problematic areas
Authors: Zawadzki Jarosław , Fabijańczyk Piotr
Published: September 2019

Soil contamination with rare earth metals (REE) can have both direct and indirect connection with industrial activity and ore-exploration. In the studies conducted so far, the presence of rare earth elements in coal seams, coal combustion waste as well as fly ash was found. It is important that detailed studies of the REE content in soil were not carried out in Poland. Until now, in a few studies, a high content of cerium and lanthanum was found in relation to the average content of the torn ones in the world. This work focuses on the areas under the influence of the industry associated with the extraction and combustion of hard coal, but also with other types of industry. Analyzes of REE content in soil were conducted in selected areas of the Upper Silesian Industrial Region and Norway, located near the Bjornevatn mine. In study areas, soil samples were collected and used for chemical and magnetometric measurements. Firstly, concentrations of REE were determined, and after that soil samples were used to measure soil magnetic susceptibility. Finally, statistical analyses were performed in order to check the correlation between REE concentrations in soil and soil magnetic susceptibility.
Solutions for supporting the management of network technical systems in the aspect of the Smart City concept
Authors: Loska Andrzej , Wyczółkowski Ryszard , Barrionuevo D. Rafael
Published: September 2019

The article discusses issues related to the management of the city's network infrastructure in the context of the Smart City idea. There was presented an overview of the possibilities and needs of supporting the maintenance management of network technical systems, as components of technical urban infrastructure. Issues related to the meaning of numerical models of various types of networks in comprehensive city management were discussed. Against this background, gaps and challenges in the implementation of modern technologies have been shown on the example of an important category of network technical systems such as water supply system
Impact of selected lean management tools on work safety
Authors: Furman Joanna
Published: September 2019

The ongoing processes in production enterprises must be constantly monitored and improved in order to meet the requirements of growing competition in the technical, technological and organizational aspects. Also, customer expectations regarding the quality of products are constantly increasing, while maintaining the lowest manufacturing costs. The analysis of the course of operations, exploited resources, materials, recharges, as well as the identification of risk and losses are the basis for improvement and optimization, leading to increase in process efficiency, as well as optimisation of organization and working conditions. There are many management methods and tools used to streamline processes. Currently, Lean Management (LM) is one of the most popular and effective concepts in this field. The primary goal of LM is to eliminate activities that do not bring added value in processes, while saving resources and meeting customer requirements. The Lean concept offers many useful methods and tools that, when properly selected in the organization, implemented and used, can bring the intended results. The aim of the article is to present the results of the analysis of potentially accidental events in a production enterprise based on the identification of key threats occurring in the plant. Based on Lean Management methods and tools implemented in the company, their impact on work safety was determined.
Methodology of conformity assessment with the essential requirements for electrotechnical products
Authors: Małysa Tomasz
Published: September 2019

The article presents a methodical approach to conformity assessment related to the introduction, putting into service on the European market of electrical or electrotechnical products. The developed methodology can be an effective control tool, allowing to assess whether all activities within the conformity assessment performed by the manufacturer have been carried out. The aim of the study is to present the possibility of adapting the developed methodology of approach to the assessment of compliance with the essential requirements in industrial conditions. In the case of the industry being analyzed, the basis for conformity assessment is the requirements set out in the New Approach Directives. The essential requirements set out in New Approach Directives must be met if the product is placed on the market or putting into service. The article presents the implementation of the conformity assessment process based on harmonized standards with the directives related to the product in question. The application of harmonized standards in the conformity assessment process allowed the manufacturer to use the so-called principles of presumption of conformity, referred to in the Act on conformity assessment systems and market surveillance.
Statistical process control and CAQ systems as a tools assuring quality in the automotive industry
Authors: Wiecha Łukasz , Ćwikła Grzegorz
Published: September 2019

The aim of the article is to present the case study of implementation of the example CAQ system, which allows to meet the requirements of IATF 16949:2016 and the VDA 6.1 standards in the field of statistical process control (SPC). The foundations of the CAQ systems concept and their specific requirements, especially for companies operating in the automotive industry, for which modern CAQ tools are necessary, in the described case based on the LEAN-QS program, are presented. The article presents the observations and results of the analysis of the operation of the quality assurance system in a company that is a supplier of car parts. One of the modules of the LEAN-QS program was implemented there, which makes it possible to meet the requirements of a certified quality management system. The effectiveness of the presented tool was demonstrated, allowing to meet industry requirements while minimizing resources necessary for supervision and proper implementation of the quality management system process, which in this case is the SPC.
Evaluation of Tooth No. 2674 and ESCO Tooth 3D models
Authors: Moni Vlastimil , Klouda Petr , Miletič Tomáš , Helebrant František , Donát Luboš , Blata Jan , Řehoř Michal
Published: September 2019

The expense of restoring of excavators cutting bodies is increasing these days in the Most Basin area, primarily the replacement of tooth because of abrasion expense. The main reason is the complicated geological situation of overburden rocks, first of all the occurrence of sands and hard structures in the overburden cuts rocks in the deep horizons of open pit mines. Description of the first part of the strength analysis and applicability of 3D models of the tooth serial number 2673 and the tooth ESCO Super V39VYH with application of finite element method (FEM) is the main topic of this article. This research is the stage of the project based on optimisation of the shape and primarily the material used during manufacturing of the mining and ground machines cutting bodies in concrete mining conditions. The research is going on with application of new knowledge in the field of material engineering, metallurgy, cryogenic and nanotechnology. The main target is the increasing of mining process efficiency and the mining machines key node lifetime. Research of the excavator tooth parameters described in this article is very important part of the research.
Properties of alloys in the crystallization interval
Authors: Ružbarský Juraj
Published: September 2019

In the contribution the high growth of viscosity and initial stress of alloys in the crystallization interval with undercooling against of the liquidus follows from theoretical analysis. At these alloys used in pressure die casting the permissible undercooling that does not endanger pressure die casting operation. The application of the device for die temperature regulation ensures the safe operation.
STEM-oriented high schools and dual enrolment as effective methods for promoting engineering programs
Authors: Grebski Michalene Eva , Grebski Wieslaw
Published: September 2019

The paper describes the different methods of promoting science, technology, engineering and mathematics to meet the demand for a qualified workforce in those areas. STEM-oriented (Science Technology Engineering Mathematics) high schools combined with dual enrollment opportunities have been proven to be effective methods of promoting engineering careers. The article also discusses the typical curriculum of STEM high schools as well as the selection of college courses for the dual enrollment option.
Circular economy in companies: an analysis of selected indicators from a managerial perspective
Authors: Janik Agnieszka , Ryszko Adam
Published: September 2019

The circular economy (CE) concept is now gaining increasing attention and it is being widely explored as a promising path to sustainable development. CE implementation requires extensive activities needed for the transition from the linear to the circular model and suitable tools to support decision-makers in setting adequate goals and monitoring the effects of undertaken actions. Considering the need for research on effective CE performance evaluation, this article presents a comprehensive analysis and comparison of CE indicators available at the micro level. Based on a systematic literature review, 19 such CE indicators were identified. The indicators were assessed and compared using the Delphi methodology. The suitability of each metric for a comprehensive evaluation of CE performance was analyzed taking account of the criteria related to analytical opportunities and potential application of CE indicators, together with the criteria related to organizational and operational issues of practical application of CE indicators. The usefulness of CE indicators for practical implementation in companies was determined from a managerial perspective, with particular emphasis on supporting the decision-making process. The comparison of CE indicators presented in this article is intended to facilitate the choice of a specific metric depending on the company’s needs and on the possibilities of its application.
Economic and social aspects of merger of territorial self-government units – Polish experience
Authors: Kaźmierczak-Piwko Leszek , Dubicki Piotr , Dybikowska Adrianna
Published: September 2019

The article deals with the issues of merging Local Government Units (LGU). Based on Polish experience related to the unique process of integration of the city and the commune of Zielona Góra in 2015, the authors present the most important economic and social aspects of combining local government units. The article also presents important elements of the process of creating a new functional area from two different neighbouring local government units. Moreover, the exemplified research results, carried out in 2018 among residents of the commune annexed to the city, concerning the economic and social effects of the integration process, made available by the City of Zielona Góra for the purposes of this article, were presented and discussed there. At the same time, a synthetic evaluation of this process was carried out in the light of the documents analysed in the article that form the basis of the merger process and presented results of empirical research.