bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis of Ceramic Layers for Solid Oxide Fuel Cells by Means of TPCVD
Authors: Müller M. , Bouyer E. , von Bradke M. , Henne R. , Schiller G. , Heimann R.B. , Lins G.
Published: October 2022

This paper investigates the potential of radio frequency thermal plasma chemical vapor deposition for producing Sr-doped La-Mn-perovskite and yttria-doped zirconia layers for solid-oxide fuel cells. Aqueous solutions were used as starting materials and were injected into the hot plasma core by means of an air-assist atomizer. Test results show how the microstructure, dopant distribution, and phase purity of the resulting layers depends both on process conditions and the material system. Paper includes a German-language abstract.
New Coating Solutions for Biomedical Applications
Authors: Langer G. , Kwo J. , Murano D.
Published: October 2022

Crystallized calcium carbonate, CaCO3, is a mineral phase that occurs in nature as aragonite. It is well known that CaCO3 shows excellent chemical interaction and intensive binding in direct contact to bone structures. This paper discusses the development of a plasma spraying process that shows promise for producing dense calcium carbonate layers with good adhesion properties. Tests reveal that the resulting coatings are fully biocompatible and have faster resorption times than plasma sprayed hydroxyapatite. Paper includes a German-language abstract.
Aufbau gerichtet erstarrter Titanaluminidstrukturen mit dem Laserstrahlbeschichten (Deposition of Epitaxially Grown Titanium Aluminide Structures by Laser Beam Cladding)
Authors: Theiler C. , Seefeld T. , Sepold G. , Wilden J. , Frank H.
Published: October 2022

Titanium aluminide shows good potential for lightweight applications at high temperatures, provided various problems are overcome. The primary problem, low-temperature brittleness, can be resolved through a combination of laser cladding and directional solidification. This paper explains how Ti48Al2Cr alloy is applied and how process parameters must be chosen so that directional solidification occurs. This involves the use of FEM simulations, carried out in parallel with experimental work, to determine temperature gradients and cooling rates at the solidification front and in the melt pool and their effect on solidification structures. Paper text in German.
Structure-Wear Resistance Relationship for JP-5000 Cermet Coatings
Authors: Shmyreva T. , Wang D.
Published: October 2022

This paper presents a comparative study of the microstructure, phase properties, hardness, and wear resistance of high-pressure HVOF sprayed coatings. The layers were produced by the JP-5000 method using WC12Co and WC17Co powders varying in size distribution and morphology. Spray parameters were statistically evaluated using a design-of-experiments approach in order to optimize wear resistance as well as deposition efficiency, carbide grain size, and degree of oxidation. Paper includes a German-language abstract.
The Relationship Between Tungsten Carbide Coatings and Spray Conditions in Low-Power Plasma Spraying with Internal Powder Injection
Authors: Gao Y. , An L.T. , Peng C. , Shi Y.
Published: October 2022

In this paper, a low-power plasma spraying system is used to deposit layers of tungsten carbide on carbon steel substrates. Numerous coating samples were produced and examined in order to determine how plasma gas composition, voltage, current, and other parameters affect the hardness and porosity of WC coatings and how injected particles interact with nozzle surfaces. Test results indicate that there is a tendency for less particle adherence to the nozzle at higher voltages, lower currents, and certain plasma gas compositions. Paper includes a German-language abstract.
On the Influence of Spraying Conditions and Powder Feed Structure on Wear Properties of Atmospheric and Vacuum Plasma Sprayed Al2O3-13TiO2 Coatings
Authors: Leblanc L. , Kharlanova E.
Published: October 2022

This paper investigates the mechanical properties of plasma-sprayed Al2O3-TiO2 coatings. Micro and nano powders were deposited on hot and cold substrates under different conditions using atmospheric and vacuum plasma spraying. The coatings were then characterized based on microstructure, hardness, phase composition, abrasive wear rate, and adhesion strength. It is observed that Al2O3-TiO2 layers are very dependent on the coating system, powder form, and spray parameters used. The layers sprayed with nanopowder in a vacuum were found to have the best combination of properties. Paper includes a German-language abstract.
Tribotechnical Characteristics of Plasma Sprayed Alloyed Cast Iron-NiCrSiB Coatings
Authors: Kharlamov Y.A. , Budagyunchz N.A. , Yudichki S.A. , Shevchenko A.V.
Published: October 2022

This paper examines plasma-sprayed layers obtained from low-cost mixtures of cast iron and NiCrSiB powders. The composite coatings are characterized based on friction and wear testing and are found to have better tribological properties than coatings produced from any single alloy powder. The structure and properties of composite layers with different compositions of iron and nickel are investigated as well. Paper includes a German-language abstract.
A Modified HVOF Thermal Spray System for Producing Alumina Coating
Authors: Shimizu Y. , Yamashita K. , Sakaki K.
Published: October 2022

A high-velocity oxyfuel plant was converted to process aluminum oxide. Burner nozzles with different geometries were evaluated for use based on experimental measurements and numeric simulations. Although the modified nozzles promised an improvement in the melting of alumina particles, it was found that some of the melted alumina caked on the inside of the nozzle and fused together into large particles that eventually dislodged, causing a reduction in transfer efficiency. This paper explains how the caking problem was solved by combining the output of a high-velocity oxyfuel gun with that of a combustion flame spraying gun. Tests show that the hybrid solution produces hard alumina coatings with relatively dense microstructure at a transfer efficiency greater than 50%. Paper includes a German-language abstract.
An Investigation of the Corrosion Behaviour of Ni- and Co-Based Alloys Sprayed with Gas and Liquid Fuel HVOF Guns
Authors: Zhang D. , Harris S.J. , McCartney D.G.
Published: October 2022

A number of studies have examined the influence of process parameters on the microstructure and corrosion resistance of metallic coatings produced by gas-fuel HVOF spraying, but much less is known about the coatings produced by liquid-fuel HVOF processes. The aim of this study is to investigate the corrosion behavior and microstructure of nickel and cobalt alloys deposited by both methods and show how it compares with that of various superalloys. Paper includes a German-language abstract.
A New Technique to Plasma Spray Composite Stainless Steel-Graphite Coating with Low Friction Coefficient on 100C6 Steel
Authors: Harir A. , Ageorges H. , Grimaud A. , Fauchais P. , Platon F.
Published: October 2022

The aim of this study is to achieve, on aluminum alloy substrates, coatings with higher hardness and better dry tribological behavior than that of the substrate. Using atmospheric plasma spraying and a vibratory fluidized bed powder feeder, coatings consisting of a stainless steel matrix with embedded graphite particles were successfully deposited. The dry coefficient of friction of the composite layer is comparable with that of a commonly used stainless steel surface. SEM examinations of polished cross-sections reveal a lamellar structure with randomly distributed graphite inclusions. Paper includes a German-language abstract.
Innere Zentrifugalprojektionsbeschichtung (iCPC) – ein neuartiges Beschichtungs-verfahren (Inner Centrifugal Projection Coating (iCPC) – a Novel Coating Process)
Authors: Krüssel Th. , Bach Fr.-W. , Stoll P.
Published: October 2022

This paper describes a coating process, called internal centrifugal projection coating, in which rotating additive materials and substrate surfaces are melted by an electron beam to facilitate adhesion. It explains that the process was developed mainly to apply coatings inside engine bores and examines the microstructure of a molybdenum coating centrifugally projected onto an aluminum substrate. Paper includes a German-language abstract.
Erfahrungen beim Umsetzen der neuen ISO-Normen und EWF-Ausbildungen zu Qualitätsmanagement und Personalqualifikation (Experiences in Application of the New ISO Standards and EWF Education and Training for Quality Management and Qualification of Personnel)
Authors: Huber R. , Böhme D.G.F.
Published: October 2022

This paper reviews the new DIN EN ISO personnel qualification and quality management standards and EWF training guidelines for European thermal sprayers. EWF education and training programs run for a period of three weeks, filling critical gaps in knowledge and experience. The primary aim of the ISO standards is to facilitate a reproducible process for spraying coatings of a consistent quality. Paper text in German.
Residual and Applied Stresses in Thermally Sprayed Metallic and Ceramic Coatings
Authors: Dubský J. , Matějíček J.
Published: October 2022

In this paper, a four-point bending test is developed that makes it possible to load layers with defined tensile stresses. In the experiments, high-density stainless steel is applied using HVOF and ceramic layers are produced using water-stabilized plasma spraying. Both coating materials are then subjected to bend testing. The steel layers show a volume of elasticity twice that of the surface elasticity module, while in the ceramic layers, no surface tension was observed. This can be explained by the opening and closing of crack structures in the material. Paper includes a German-language abstract.
Study of Dielectric Properties of Plasma Sprayed Silicates at Low Voltage
Authors: Ctibor P. , Sedláček J. , Neufuss K. , Dubský J. , Chráska P.
Published: October 2022

This paper examines the dielectric properties of silicate coatings including mullite (3Al2O3-2SiO2), steatite (MgSiO3), spodumene (Li2O-Al2O3-4SiO2), and olivine with near-forsterite (Mg2SiO4) composition. The materials were sprayed using a water-stabilized plasma gun and the deposits were removed from the substrate, polished, and sputtered with aluminum on both sides. Electrical tests consisting of voltage, resistance, and capacitance measurements showed that the relative conductivity of plasma-sprayed silicates is stable between 200 Hz and 1 MHz, which is suitable for many insulation applications. Paper includes a German-language abstract.
Standardization in Coating Evaluation: A Universal System for Repair Coatings
Authors: Sauer J. , van Wonderen M.
Published: October 2022

This paper discusses the ongoing development of a standard for manufacturing and testing thermal spray coatings used in the repair of aircraft engines. Excellent progress has been made in eliminating non-value added tests and in defining a system for preparing metallographic specimens and conducting microstructural evaluations. Paper includes a German-language abstract.
Study and Characterization of High-Velocity Oxyfuel (HVOF) Sprayed Wear Coatings
Authors: Lima C.R.C.
Published: October 2022

This paper presents the results of a study on WC-Co layers obtained by high-velocity oxyfuel spraying using different commercial systems. It explains how test samples were produced and how coating microstructure, hardness, and wear resistance was examined. The results show that the layers have excellent wear resistance and are suitable for many applications. Paper includes a German-language abstract.
Laser Treatment of Thermally Sprayed Coatings
Authors: Pawlowski L.
Published: October 2022

This paper investigates the effect of laser post-treatment on cladded coatings deposited by different thermal spray methods. A wide range of coatings, including a VPS sprayed alloy, three APS sprayed oxide ceramics, and two composites, are treated with either a CO2 or pulsed Nd:YAG high-power laser. The microstructure and wear resistance of the layers are examined before and after treatment and the interaction between the laser and material is modeled using Fusion-2D. Paper includes a German-language abstract.
Microstructure Investigation of HVOF Sprayed WC-Co Coatings
Authors: Colin E. , Leaute M. , Roger T. , Le Maguer A. , Pawlowski L. , Janssen J.-P.
Published: October 2022

This paper discusses the optimization of HVOF spraying parameters for applying WC-Co and WC-CoCr powders. Coatings produced using the optimized parameters are evaluated based on microstructure, microhardness, and porosity. The influence of the processing method used to produce the powders is also considered along with in-flight particle characteristics. Paper includes a German-language abstract.
Thermogravimetric Analysis for Aluminum Phosphate Sealed Alumina and Chromia Coatings
Authors: Vippola M. , Vuorinen J. , Vuoristo P. , Lepistö T. , Mäntylä T.
Published: October 2022

This paper examines plasma-sprayed alumina and chromia coatings, with and without aluminum phosphate sealing, in order to assess the stability of the as-sprayed layers and phosphate reaction as a function of temperature during the sealing process. Thermogravimetric analysis showed no changes in mass in the alumina layers, an increase of 1.7% in the mass of the chromia layers due to oxidation, and a 14% loss of mass in the sealed layers, which agrees well with the evaporation behavior of a pure seal. Paper includes a German-language abstract.
Effect of Flow Regime on Particle Velocity in the HVOF Process
Authors: Dolatabadi A. , Pershin V. , Mostaghimi J.
Published: October 2022

Numerical modeling of the complex two-phase flow of gas-solid particles in a highly compressible field, as occurs in HVOF spraying, can serve as a tool for optimizing deposition efficiency, nozzle designs, and other parameters. In this paper, the authors develop a numerical model based on Euler’s equation and use it to investigate the effect of flow regime on the velocity of particles in an oxyfuel jet. Simulations based on typical HVOF operating conditions show large variations in the flow regime in regions of high particle concentration. Unlike other modeling approaches, the Eulerian approach predicts that the flow becomes subsonic near the centerline and drag force decreases significantly as do particle velocity and deposition efficiency. The effects of flow regime are also measured experimentally, validating the result. Paper includes a German-language abstract.
Influence of Nozzle Design on the Structure of a Plasma Jet Under Vacuum Conditions
Authors: Bolot R. , Klein D. , Coddet C.
Published: October 2022

This paper presents a detailed numerical analysis that shows why Laval nozzles are used for vacuum plasma spraying and how to optimize their design to achieve a uniform plasma jet free of expansion waves under different spraying conditions. A Laval nozzle prototype is tested against a commercially available conical nozzle and is found to deliver a longer core jet with less turbulent scattering. Paper includes a German-language abstract.
Effect of System Design on the Characteristics of Thermal Radiation Signals in the Simultaneous Measurement of Spray Particle Parameters
Authors: Li C.-J. , Wu T. , Li C.-X.
Published: October 2022

In-flight particle analysis via infrared sensing has proven helpful in the development and control of thermal spray processes. The aim of this work is to assess the effect of optical system design on thermal measurement accuracy. Through experimental testing and theoretical analyses, investigators show how variations in optical component sizes, alignments, and arrangements affect the amplitude and shape of sensor voltage waveforms and signal peaks. It is observed that only when photodetectors are in saturation, marked by the trapezoidal shape of their output signals, can they provide information about particle velocity, temperature, and size, and in some cases, even volume distribution. Correlation tests are carried out by means of plasma spraying molybdenum powder. Paper includes a German-language abstract.
Influence of Noise Factors on Atmospheric Plasma Spraying
Authors: Seemann K. , Fischer A. , Lugscheider E.
Published: October 2022

Studies on atmospheric plasma spraying have generally focused on the influence primary parameters such as gas flows and plasma current. However, the APS process is also influenced by a large number of disturbance variables including electrode wear, cooling system irregularities, and disruptions in powder injection. This study investigates both the cause and effect of each of these factors in the context of aluminum oxide spraying. Numerous measurements are made showing how electrode wear, cooling fluctuations, flow measurement inaccuracy, and variations in powder feed rates affect in-flight particle characteristics, deposition efficiency, and layer thickness. Paper includes a German-language abstract.
Global solvability of a nonlinear Boltzmann equation
Authors: Akysh (Akishev) A.Sh.
Published: October 2022

In this paper, based on the splitting method scheme, the existence and uniqueness theorem on the whole time interval t ∈ [0, T), T ≤ ∞ for the full nonlinear Boltzmann equation in the nonequilibrium case is proved where the intermolecular interactions are hard-sphere molecule and central forces. Considering the existence of a bounded solution in the space C, the strict positivity of the solution to the full nonlinear Boltzmann equation is proved when the initial function is positive. On the basis of this some mathematical justification of the H−theorem of Boltzmann is shown.
Interferência humana no bem-estar dos grandes animais: Retrospectiva dos casos atendidos em cinco anos
Authors: Hintz Loisa Padilha , Bertagnon Heloisa Godoi
Published: October 2022

The coexistence of human and animal dates to the Neolithic period, and as close as this relationship is, the idea of animals as sentient beings is recent and sometimes ignored. Certain measures have been taken to change this reality, such as the creation of the Brambell Committee, the scoring of the five freedoms of animal welfare and animal rights guaranteed by law, and the duties of the veterinarian to ensure the physical and mental health of patients. Thus, this work aimed at performing a retrospective study of the cases seen at the Large Animal Sector of UNICENTRO over five years, to evaluate human interference in animal welfare and classify them into three types: I – ignorance, inexperience, incompetence on the part of the owner; II – lack of consideration, abandonment, and aggression; III – negligence, imprudence, and veterinary incompetence. Among the results obtained, of the 693 cases studied, 20% of the animals were seen because of discomfort, with 102 animals of type I, 39 of type II, and three cases of type III. As for the animal species, the most affected were sheep (30%) and cattle (29%). From the literature review carried out, it was possible to determine that the cases of mistreatment of large animals are little identified and do not reach the authorities. However, ignorance on the part of the owners is the main reason why welfare is not practiced on the properties. Therefore, it was possible to conclude that the key to change this reality is the dissemination of the idea of animal welfare and its positive consequences for the production and the producer's pocket, besides the fact that studying and publicizing the cases treated maintains the dignity of the veterinary profession.
Impactos da pandemia do coronavírus no bem-estar animal
Authors: Moya Carla
Published: October 2022

In 2020, the World Health Organization decreed a state of pandemic caused by the “new coronavirus”, Covid-19, leading to a scenario of social isolation worldwide, drastically changing the routine of human beings and, consequently, of their companion animals. In this context, the following literature review aims to carry out a compilation of research results promoted worldwide, bringing together data from several studies on the impacts caused by the coronavirus pandemic on animal well-being and behavior. In this way, it was possible to conclude that the biggest complication caused during this period was the hyper attachment and excessive dependence of the companion animals with their tutors, triggering several behavioral disorders, such as the Separation Anxiety Syndrome, especially after the normal return of the activities of the human daily life. In addition, some negative repercussions of the closeness of the human-animal relationship during this period was the significant increase in dog aggression attacks, especially against children, related to the reduction of walks and moments of rest and disconnection of the animals. Studies have also made it possible to identify risk factors related to confinement, such as less socialization and difficult access to veterinary services. Thus, it can be concluded that the mental health status of tutors has clear effects on the behavior and well-being of companion animals.
Penggunaan Model Pembelajaran Matematika Realistik pada Mahasiswa
Authors: Taga Gregorius , Restianim Vivien
Published: October 2022

The purpose of this study was to determine student learning outcomes in algebraic subjects in the University of Flores Mathematics Education Study Program using realistic mathematics learning device models. This type of research is quantitative research with quasi-experimental design, pretest and posttest group, the sample is all fourth semester students of mathematics education program FKIP Flores University in 2018/2019 academic year. Data obtained using student learning outcomes, data processed using ANOVA statistical tests. The results obtained by the value of Fcount 77.13 is greater than Ftable 4.10 at dk 37. Calculation of student learning outcomes in the experimental group after using realistic mathematics learning models, seen student learning outcomes increased significantly. Conclusion, learning mathematics using realistic models can be used as an alternative to improving student learning outcomes in algebraic structure subjects.

Keywords: Learning Outcomes, Learning Models, Realistic Mathematics, Algebraic Structure
Penerapan Pendekatan Matematika Realistik Indonesia (PMRI) terhadap Kemampuan Pemecahan Masalah Siswa
Authors: Rosalina Elya , Mandasari Novianti
Published: October 2022

This study aims to determine the Problem Solving Ability of Elementary School Class Students after the Indonesian Realistic Mathematics Approach (PMRI) was applied. This research is a quantitative research using experimental methods. The sampling technique used was a random sample technique. Where for the sampling method, which is drawn, the names that come out when drawn will be agreed to serve as the experimental class. This research consists of one independent variable, namely the Indonesian Realistic Mathematics Approach (PMRI), and the dependent variable is Problem Solving Ability. The subjects of this study were third grade students of SD 3 Lubuklinggau. Data collection is done by test technique. The data obtained were then analyzed using the t-test. After the data was analyzed using the t-test at a significant level of 5%, it was obtained tcount (7.57) > ttable (1.672), so it can be said that there was an increase in the problem solving ability of third grade students at SD Negeri 3 Lubuklinggau after the Indonesian Realistic Mathematics Approach (PMRI) was applied. . In conclusion, there is an increase in the problem solving ability of elementary school students after the implementation of the Indonesian Realistic Mathematics (PMRI) approach.

Keywords: Indonesian Realistic Mathematics Approach (PMRI), Problem Solving Ability
Hasil Belajar Matematika Siswa Ditinjau Dari Kecemasan Matematika dan Fasilitas Belajar di Rumah
Authors: Ibrahim Ibrahim , Amin Rokyul
Published: October 2022

This study aims to determine the effect of mathematics anxiety, learning facilities at home, and the effect of mathematics anxiety and learning facilities at home simultaneously on students' mathematics learning outcomes. The approach in this research uses a quantitative approach, the type of correlational research. This research was conducted at SMP Negeri 1 Bayat in grades VIII A and VIII B in the 2020/2021 school year. The sample used was 30 students, the sampling technique was simple random sampling. The instrument used to use data from the mathematics anxiety scale test and the home learning facility scale test. The data analysis technique in this study used multiple regression analysis. Data analysis was carried out with the help of the SPSS 25 application. The results of this study indicate that: 1) there is a negative effect of mathematics anxiety on students' mathematics learning outcomes; 2) there is a positive effect of home learning facilities on students' mathematics learning outcomes; 3) there is an effect of mathematics anxiety and learning facilities at home together on students' mathematics learning outcomes.

 Keywords: Mathematics Anxiety, Learning Facilities at Home, Mathematics Learning Outcomes
Analisis Kemampuan Computational Thinking Dalam Pembuatan Media Pembelajaran Matematika
Authors: Azmi Rizal Dian , Ummah Siti Khoiruli
Published: October 2022

The purpose of this study was to reveal the implementation of Project Base Learning (PjBL)-based learning and then analyze the Computational Thinking (CT) ability of students of the Mathematics Education Study Program, University of Muhammadiyah Malang through a learning media development project. The approach used in this research is descriptive qualitative. The subjects in this study were students who programmed the Programming Language course in semester 3. The results of the research, the projects carried out in PjBL learning were making learning media using Matlab which included the stages of needs analysis, project planning, scheduling, monitoring, testing results and evaluating carried out. very well and systematically. The media produced by students has met the aspects of fluency in use, accuracy of scripts, and flowchart logic. The student's CT ability is in a good category from the aspect of abstraction, logarithmic thinking, debugging/evaluation, and generalization because it has met the achievement percentage of 82%. In conclusion, the learning media developed based on Project Base Learning (PjBL) has been implemented well, covering aspects of smooth use and effectively increasing the Computational Thinking (CT) ability of students of the Mathematics Education Study Program, University of Muhammadiyah Malang.

Keywords: Computational Thinking, Learning Media, Project Base Learning
Recovery from hemidiaphragmatic paralysis with improved respiratory function following cervical laminoplasty and foraminotomy: illustrative case
Authors: Kitamura Kazushi , Hayashi Hideki , Ishibashi Ryota , Toda Hiroki
Published: October 2022

BACKGROUND

Hemidiaphragmatic paralysis can occasionally be caused by cervical canal and foraminal stenosis. Rarely is the effect of surgical decompression on hemidiaphragmatic paralyzed patient respiratory function recorded. This report details a case of postoperative respiratory function restoration in a patient with cervical spondylosis–related hemidiaphragmatic paralysis.

OBSERVATIONS

A 77-year-old woman suffered hemidiaphragmatic paralysis caused by cervical canal and foraminal stenosis. The phrenic nerve palsy was thought to be caused by compression of the cervical spinal cord and its nerve root. The patient received a C3 laminectomy, a C4–6 laminoplasty, and a left C3–4 and C4–5 posterior foraminotomy. After surgery, she improved her maximum inspiratory pressure and respiratory function.

LESSONS

Cervical canal and foraminal stenosis may cause hemidiaphragmatic paralysis due to radiculopathy-induced phrenic nerve palsy. Laminoplasty and posterior foraminotomy can restore respiratory dysfunction related to diaphragmatic paralysis by decompressing the ventral horn of the spinal cord and spinal nerve root.
Substantiation of the optimal performance parameters for a quarry during the stage-wise development of steeply dipping ore deposits
Authors: Fomin Sergey , Ovsyannikov Maxim
Published: October 2022

The use of stage-wise schemes in the development of deep quarries is one of the ways to increase the economic efficiency of mining a deposit and determining the optimal stage parameters remains an urgent task. Such parameters are stage depth, bench height, block length, etc. However, there is a wide range of values for these parameters. Therefore, to select the optimal values and evaluate the effectiveness of design solutions, it is advisable to use the net present value, which is an international notion. As a result of the analysis of data on deposits, a large number of variable indicators can be identified that presumably affect the efficiency of mining. The article proposes to divide all parameters of the quarry mining into two types: mine engineering and economic. The importance of each of them is determined by the measure of influence on the net present value. Thus, to assess the measure of influence of mining indicators, the average values of each of them are taken, and as a result of the alternating change of one parameter under study, the measure of its influence on the discounted income received is estimated. The results of the analysis of relevant factors, their evaluation and comparative analysis are important indicators that significantly affect the design decisions made and the effectiveness of the investment project.
Analisis Ekonomi Kepiting Bakau (Scylla sp.) Melalui Sistem Pengepul di Segara Anakan Bagian Barat Cilacap
Authors: Junaidi Teuku , Hilmi Endang , Madusari Benny Diah , Williansyah M. Haris
Published: October 2022

Ekosistem mangrove memiliki jasa ekosistem sebagai habitat bagi kepiting bakau (Scylla sp.). Kepiting bakau Scylla sp. merupakan organisme perairan yang memiliki nilai ekonomis yang tinggi yang menjadi sumber pendapatan bagi masyarakat sekitarnya termasuk di wilayah Segara Anakan bagian Barat. Penelitian ini bertujuan untuk menganalisis nilai ekonomi kepiting bakau Scylla sp dari system pengepul sebagai bentuk perdagangan kepiting bakau Scylla sp. Metode yang digunakan dalam penelitian ini adalah analisis ekonomi melalui pendekatan analisis cash flow. Hasil penelitian ini menunjukan bahwa pendapatan pengepul mencapai Rp. 465.360.333 dengan total biaya mencapai  Rp 438.045.861 serta nilai keuntungan yang didapat pengepul sekitar Rp. 27.314.472. Hasil analisis kelayakan usaha, menunjukan bahwa nilai nilai pendapatan saat ini  (NPV) rata-rata Rp. 11.367.986 nilai suku bunga yang dapat diberikan (IRR) mencapai 42 % dan rasio pendapatan dengan biaya (BCR)  mencapai 1,74.  Dari analisis kelayakan tersebut menunjukan bahwa system pengepul bagi komoditi kepiting bakau Scylla sp layak untuk dilakukan
Penambahan Tepung Buah Pepaya (Carica papaya L.) Terhadap Pertumbuhan dan Rasio Konversi Pakan Ikan Bandeng (Chanos chanos)
Authors: Wijianto Wijianto , Linayati Linayati , Maghfiroh Maghfiroh
Published: October 2022

Ikan bandeng (Chanos chanos) merupakan salah satu ikan yang digemari oleh masyarakat dan potensial untuk dikembangkan karena bernilai ekonomis. Buah pepaya merupakan salah satu buah yang mengandung enzim papain. Enzim papain bertugas sebagai biokatalisator dalam reaksi kimia pada proses metabolisme. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan buah pepaya pada pakan terhadap pertumbuhan dan rasio konversi pakan serta untuk mengetahui dosis yang tepat untuk pakan ikan bandeng. Ikan uji menggunakan ikan bandeng berukuran 3 cm dengan padat tebar 1 ekor/L. Metode yang digunakan yaitu metode eksperimental menggunakan rancangan acak lengkap (RAL), terdiri atas 4 perlakuan 3 ulangan. Pakan uji yaitu pakan yang ditambahkan tepung buah pepaya sesuai dosis tiap perlakuan yaitu 0 % per kg pakan (A); 5% per kg pakan (B); 7,5 % per kg pakan (C); dan 10% per kg pakan (D). Frekuensi pemberian pakan sebanyak 3 kali sehari dan dipelihara selama 35 hari. Hasil penelitian menunjukkan nilai pertumbuhan bobot mutlak terbaik yaitu pada perlakuan 7,5% per kg pakan (D). Rasio konversi pakan terbaik yaitu pada perlakuan 7,5% per kg (D). Kualitas air selama pemeliharaan ikan bandeng yakni suhu 27–29 0C, salinitas 27–30 ppt, pH 6,8–7,3, dan DO 5 – 6 mg/l.

 

Kata kunci: Buah Pepaya, FCR, Ikan Bandeng, Pertumbuhan
Effect of Time and Temperature Variables on Prothrombin Time and International Normalized Ratio of Plasma in Patients in Gampaha, Sri Lanka
Authors: Ranasınghe Vıraj , Jayasundara Sameera Maduranga , Sılva Sanjaya De , Marikar Faiz , Yapa Randıka Wımalasırı
Published: October 2022

Generating accurate results for Prothrombin time (PT) and International Normalized Ratio (INR), PT/INR test is paramount in treatment monitoring. The diagnosis process measures how long it takes blood to clot. The main objective of this study was to determine the effect of storage time and temperature variables on PT and INR results in patients attending Hematologic clinics in Sri Lanka. This cross-sectional study was conducted during June and July 2021. PT was measured in the plasma samples, stored at different temperatures at baseline (0 hours), and then after 12 hours, 18 hours, and 24 hours after specimen collection. INR was calculated from each result, and the deviation percentage of PT and INR was calculated compared to the baseline result (0 hours). Then PT and INR percentage deviation is grouped as <10% and >10% to find biologically significant variations while paired t-test was performed to find statistical significance using GraphPad prism 8.4.3. At refrigerated temperature, both PT and INR results showed>10% variation once kept 24 hours, and this variation was statistically significant (p<0.01, Wilcoxon matched paired sign ranked test). The plasma specimens kept at laboratory temperature and specimen collection room temperature for 18 hours indicated >10% variation of PT and INR values, while these variations were significant at the same criteria above. These results suggest that the separated plasma could only be recommended to test up to 12 hours. Therefore, the laboratories that operate in the same climatic conditions can now use these results to plan the specimen collection accordingly.
Wolność wyrażania przekonań religijnych przez mniejszości religijne w czasie pandemii w Gruzji
Authors: Baramidze Luka
Published: October 2022

W niniejszym artykule podjęto próbę określenia kategorii wyjątku w dyskursie na temat wolności wyrażania przekonań przez mniejszości religijne, a także nazwanie grup wyznaniowych jako dominujące i niedominujące. Warto zauważyć, że rzecznik praw obywatelskich Gruzji kilkakrotnie wymienia słowo „wyjątek” w swoim raporcie z 2020 r. Zakładanie czegoś jako wyjątku nie oznacza tylko, że jedna grupa otrzymuje przywilej nad inną i naruszona jest zasada równości. Dokonanie wyjątku od ograniczeń nałożonych przez pandemię w ogóle, w szczególności oznacza stworzenie sytuacji, w której rząd wykracza poza porządek prawny zagrażając suwerenności prawa. Z drugiej strony nie ulega wątpliwości, że nawet w stanie sanitarno-epidemiologicznym praworządność powinna być przestrzegana i trzeba jej chronić.
Pojęcie działalności gospodarczej w Prawie przedsiębiorców
Authors: Nowicki Henryk , Kucharki Krzysztof
Published: October 2022

W artykule analizie poddane zostały desygnaty pojęcia działalności gospodarczej zawartego w ustawie Prawo przedsiębiorców. Perspektywa badawcza obejmowała ustalenie systemowych następstw związanych z pozytywną kwalifikacją działalności jako gospodarczej. Uwzględniono w tym zakresie zarówno system prawa polskiego, jako również prawo w wymiarze ponadnarodowym. Przyjęto, iż definicja zawarta w ustawie Prawo przedsiębiorców właściwa jest dla całego systemu prawa, z wyjątkami przewidzianymi przez ustawodawcę wprost. Wynika to z uniwersalnego charakteru przedmiotowego pojęcia, które swoją treścią właściwie służy realizacji konstytucyjnie gwarantowanej wolności działalności gospodarczej.
Standardy ochrony danych osobowych w krajach Europy Środkowo-Wschodniej
Authors: Pawlak Anna
Published: October 2022

Artykuł stanowi przegląd najważniejszych standardów ochrony danych osobowych wypracowanych przez organizacje międzynarodowe skupiające m.in. kraje Europy Środkowo-Wschodniej. W opracowaniu opisano zarówno standardy uniwersalne Organizacji Narodów Zjednoczonych, jak i regionalne (Rady Europy oraz Unii Europejskiej), a także Organizacji Współpracy Gospodarczej i Rozwoju. Przed-stawiono rozwój międzynarodowych regulacji dotyczących ochrony danych osobowych, wskazując przy tym, w których krajach Europy Środkowo-Wschodniej obowiązują poszczególne dokumenty. Artykuł stanowi próbę oceny spójności międzynarodowych rozwiązań oraz ich realnego wpływu na ustawodawstwa krajowe.
Energia elektryczna jako produkt niebezpieczny
Authors: Pyryt Zuzanna
Published: October 2022

Działanie produktu niebezpiecznego stanowi zagadnienie bliskie interesom zarówno konsumentów, jak i podmiotów, które dany produkt konsumentom dostarczają. Obecnie na rynku istnieje wiele kategorii produktów, które mogą zostać uznane za produkty niebezpieczne, jednakże szczególnej uwadze w ocenie autora poddać należy tę z kategorii produktów, której nie sposób określić jednoznacznie, tym samym w niniejszym artykule pochylono się nad energią elektryczną rozpatrywaną w charakterze produktu niebezpiecznego. Regulacje, na jakie powołuje się ustawodawca w związku z działaniem produktu niebezpiecznego budzą szereg wątpliwości i prowadzą do rozbieżności w doktrynie, bowiem nie są sformułowane w sposób wystarczająco precyzyjny i jednoznaczny, co skutkuje odmiennością stanowisk przedstawicieli doktryny. Dokonując analizy pojęcia produktu niebezpiecznego wskazać na-leży, iż w odniesieniu do energii elektrycznej właściwa wydaje się być interpretacja literalna przepisów Kodeksu cywilnego. Bezspornym jest, iż na gruncie przepisów Kodeksu cywilnego energia elektryczna nie jest rzeczą, a została ujęta jako wyjątek na podstawie art. 4491 k.c. Mając na uwadze drogę analogii, jaka mogłaby być zastosowana względem innym rodzajów energii, należy powołać się na zasadę exceptionis non sunt extentendae.
Ustawowa liczba członków (posłów, senatorów, członków Zgromadzenia Narodowego) w Konstytucji RP z 1997 roku
Authors: Rulka Marcin , Wróblewski Bartłomiej
Published: October 2022

Przedmiotem niniejszego opracowania jest analiza jednego z konstrukcyjnych elementów konstytucyjnych pojęć: ustawowa liczba posłów, ustawowa liczba senatorów oraz ustawowa liczba członków Zgromadzenia Narodowego. Autorzy zastanawiają się m.in. nad kwestią zasadności obliczania konstytucyjnych większości, kworum, jak również wymaganej liczby podpisów, w stosunku do ogólnej liczby członków danego organu, nie zaś liczby faktycznie obecnych bądź głosujących. Dokonują rozróżnienia na przejściowe oraz trwałe zmniejszenie liczby parlamentarzy-stów, analizując ich wpływ na praktykę parlamentarną. W konkluzji podzielają powszechnie przyjętą interpretację pojęcia ustawowej liczby członków, według której jest to zawsze skład określony w przepisach prawa, niezależnie od składu faktycznego, nawet w sytuacji, gdy same przepisy prawa sankcjonują takie pomniejszenie, wskazując jednak na zasadności posłużenia się tym pojęciem przy konstruowaniu niektórych konstytucyjnych większości oraz pominięcie go w innych.
Ważkość etyki w zawodach prawniczych (zagadnienia wybrane)
Authors: Stadniczeńko Justyna
Published: October 2022

We współczesnej etyce prawniczej od strony teoretyczno-fenomenologicznej zwraca się uwagę na etykę wartości, myślenie według wartości i komunikacji zagadnień etyczno-zawodowej w odniesieniu do rzeczywistości w zawodach prawniczych. Każdy z zawodów prawniczych dokonał kodyfikacji etyki uwzględniając dobro moralne w etyce sytuacyjnej prawnika, problematykę wzorów osobowych, prakseologię. W pracy podkreślono, iż korporacje prawnicze traktowane są jako etyczne wspólnoty komunikacyjne. Przez etykę zawodową rozumie się najczęściej opracowanie najważniejszych etycznych norm i perspektyw określonego zawodu, a także określenia ich faktycznych motywacji. Normy te bazują na ogólnych i podstawowych wskaźnikach etycznych przyjętych w społeczeństwie i nie powinny być ich prostym dostosowaniem do specyfiki czynności zawodowych. Przestrzeganie norm etyki zawodowej i dbałość o właściwy poziom moralny osób wykonujących zawód prawniczy ma podnieść prestiż zawodu prawniczego.
Regulacja prawa finansowego w odniesieniu do indywidulanego wskaźnika zadłużenia jednostek samorządu terytorialnego
Authors: Bogacki Sylwester , Wołowiec Tomasz
Published: October 2022

Obowiązujące od 2014 r. nowe reguły ograniczania zadłużenia były dla większości jednostek samorządu terytorialnego istotnym utrudnieniem w planowaniu i zarządzaniu finansami lokalnymi. Konstrukcja maksymalnego wskaźnika limitującego zobowiązania z tytułów określonych przez ustawodawcę, przypadające do spłaty w danym roku, jest ściśle związana z przepisami ustawy o finansach publicznych. Istotą tej regulacji prawnej jest porównanie dwóch wskaźników, ujętych w formule równania (wzoru). Pozytywnym warunkiem uchwalenia budżetu jest uzyskanie relacji, w której lewa strona wzoru (roczny wskaźnik spłaty zobowiązań) jest mniejsza albo równa prawej stronie (maksymalny wskaźnik spłaty zobowiązań).
Ograniczenia praw i wolności człowieka a kondycja zdrowotna i zadowolenie z życia w czasie pandemii COVID-19
Authors: Chwaszcz Joanna , Niewiadomska Iwona , Ostrowska Anna
Published: October 2022

Artykuł dotyczy rozważań pomiędzy wolnościami i prawami człowieka wynikającymi z Konstytucji RP a ograniczeniami związanymi z pandemią COVID-19 oraz analizuje wpływ tychże ograniczeń na zdrowie fizyczne i psychiczne obywateli. W artykule zaprezentowano badania przeprowadzone na próbie 523 osób dotyczące kondycji psychicznej i fizycznej osób badanych i ich związków ze spostrzeganiem ograniczeń, poczuciem beznadziejności oraz używaniem substancji psychoaktywnych. Artykuł zakończono implikacjami praktycznymi wynikającymi z badań.
Prawo do klimatu na gruncie Europejskiej Konwencji o Ochronie Praw Człowieka i Podstawowych Wolności. Uwagi wybrane na kanwie skargi indywidualnej do Europejskiego Trybunału Praw Człowieka z dnia 7 września 2020 r. w sprawie Cláudia Agostinho przeciwko Portugalii i 32 innym państwom
Authors: Dąbrowska Anna
Published: October 2022

Zmiany klimatyczne są jednym z istotnych zagrożeń dla życia ludzkiego. Z uwagi na ten fakt wniesienie skargi w sprawie Cláudia Agostinho przeciwko Portugalii i 32 innym państwom do Europejskiego Trybunału Praw Człowieka w Strasburgu nie jest zaskakujące, tym bardziej że w ostatnim czasie złożono wiele skarg tego rodzaju przeciwko rządom na całym świecie. Prezentowany artykuł zawiera szczegółowe omówienie tytułowej skargi, a także próbę odpowiedzi na pojawiające się pytania, m.in. czy Trybunał strasburski uzna skargę za zasadną, a jeśli tak, czy dokonując interpretacji Europejskiej Konwencji o Ochronie Praw Człowieka i Podstawowych Wolności, weźmie pod uwagę traktaty dotyczące zmian klimatycznych.
Kwaterunek wojska w międzywojennej Polsce w świetle prawa administracyjnego
Authors: Konarski Marcin
Published: October 2022

Przedmiot niniejszych rozważań pozostaje związany zarówno z ciężarami publicznymi w postaci obowiązku dostarczania zakwaterowania siłom zbrojnym w sytuacjach przewidzianych przez ustawodawcę, jak i powiązany jest z zagadnieniami gospodarki wojskowej, a w szczególności z administracją nieruchomości wojskowych. Autor dokonuje analizy przepisów prawnych w obszarze kwaterunku wojskowego w okresie międzywojennym w Polsce, uwzględniając dodatkowo praktykę kwaterunkową, jak i orzecznictwo sądowe w tym zakresie.
Rola pomocy postpenitencjarnej w przeciwdziałaniu stygmatyzacji i marginalizacji społecznej osób zwalnianych z jednostek penitencjarnych
Authors: Kuć Małgorzata
Published: October 2022

Procesy stygmatyzacji i marginalizacji społecznej byłych skazanych stanowią istotną przeszkodę w ich społecznej readaptacji. Efekty osiągnięte w drodze resocjalizacji penitencjarnej w trakcie odbywania kary pozbawienia wolności są niewystarczające dla ich usamodzielnienia się w środowisku wolnościowym w zestawieniu z reakcją niechęci społecznej i odrzucenia. Celem artykułu jest przedstawienie roli zinstytucjonalizowanej pomocy postpenitencjarnej w przeciwdziałaniu stygmatyzacji i marginalizacji społecznej byłych skazanych. W artykule wyjaśnione zostało pojęcie stygmatyzacji i marginalizacji społecznej, znaczenie oddziaływań resocjalizacyjnych w kontekście przygotowania skazanego do zwolnienia z zakładu karnego oraz zakres i formy pomocy postpenitencjarnej. Dla potrzeb wyjaśnienia stygmatyzacji posłużono się teoriami naznaczenia społecznego.
Oil Price Volatility and Equity Valuation of Listed Energy Companies in Nigeria: A Panel ARDL Model
Authors: Okodua Henry , Urhie Ese , Erhi Moses Akpesiri , Hassan Christiana Onyohu , Fasanu Eyitemi Ayomikun
Published: October 2022

The study investigates the nexus between oil price volatility and market valuation of listed energy companies in Nigeria, within a dynamic heterogeneous panel model framework. The paper utilizes the pooled mean group estimator in analysing the hypothesized relationship among equity valuation of listed energy companies in Nigeria, oil price volatility, and two control variables – firm profitability and inflation rate. The overwhelming weight of the evidence emerging from key findings of the study indicates that a distinct difference exists between the short-run impact of oil price volatility on the equity valuation of oil firms in Nigeria from the long-run impacts. While the short-run results show a mix of negative and positive, but statistically significant impacts of oil price volatility on equity valuation across listed oil firms, the long-run results indicate a statistically significant positive impact of oil price volatility on the stock valuation of energy firms in Nigeria. The short-run results are highly suggestive of the important role of the level of risk investors are willing to accommodate in their decisions to invest in stocks under different economic scenarios, in explaining stock returns for each of the oil-producing firms in Nigeria. The paper concludes that the risk premium investors place on stocks of oil companies is central in explaining the short-run impact of oil price volatility on the equity valuation of oil firms in Nigeria.
Komunikasi Antarpribadi dalam Kawin Kontrak di Cisarua - Bogor
Authors: Aminah Ratih Siti
Published: October 2022

Penelitian komunikasi perempuan pelaku kawin kontrak ini dilatarbelakangi keprihatinan terhadap kondisi perempuan pelaku kawin kontrak yang termarginalkan. Kawin kontrak merupakan pernikahan yang dibatasi oleh kesepakatan waktu. Suami pada kawin kontrak umumnya berkewarganegaraan Iran, Mesir, Uni Emirat Arab, dan Pakistan dengan usia 20 hingga 60 tahun, dan telah memiliki keluarga di negaranya. Praktik kawin kontrak diawali dengan proses komunikasi antarpribadi antara perempuan ke perantara (tukang ojek atau individu lain) sebelum dipertemukan dengan laki-laki yang mau kawin kontrak. Penelitian ini menggunakan metode pendekatan deskriptif kualitatif. Data dikumpulkan melalui penelusuran naskah, wawancara dari berbagai sumber yang memiliki kredibilitas, catatan kegiatan, serta dokumen yang didapat dari objek penelitian. Penelitian ini menjelaskan deskripsi kawin kontrak, proses komunikasi antarpribadi yang terjadi dan pola komunikasi antarpribadi dalam praktik kawin kontrak. Hasil penelitian menunjukkan, kawin kontrak dilakukan oleh pasangan perempuan yang sebagian besar berasal dari Cianjur, Indramayu dan desa-desa di Sukabumi pada rentang usia 17 30 tahun. Mereka ada yang sudah bersuami, namun ada yang masih gadis. Dalam praktik kawin kontrak kesepakatan nilai kontrak menjadi elemen sangat penting. Komunikasi antarpribadi yang terjadi meliputi komunikasi berdua (diadik) antara perantara dengan perempuan, perantara dengan laki-laki, perantara dengan orang tua perempuan dan orang tua dengan perempuan. Sedangkan komunikasi bertiga (triadik) terjadi antara perempuan-perantara-laki-laki; perempuan-perantara dan orang tua.