bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluación del prejuicio hacia inmigrantes: adaptación argentina de la escala de prejuicio sutil y manifiesto
Authors: Civalero Luciana , Alonso Daniela , Brussino Silvina
Published: May 2019

El objetivo de este artículo es analizar las propiedades psicométricas de la escala de Prejuicio Sutil y Manifiesto desarrollada originalmente por Pettigrew y Meertens (1995), en el contexto argentino. Esta escala consta de 5 dimensiones; dos que evalúan aspectos manifiestos y tres que miden aspectos sutiles del prejuicio. Se trabajó con una muestra de 856 estudiantes terciarios/as y universitarios/as de las ciudades de Córdoba (N= 253), Buenos Aires y Gran Buenos Aires (N= 193), Salta (N= 200) y Neuquén (N= 210), seleccionados/as a partir de un muestreo no probabilístico autoelegido. Se realizó un análisis confirmatorio en busca de evidencia de estructura, se estimó el coeficiente Alfa de Cronbach para evaluar la consistencia interna y se realizó un análisis de validez convergente en relación a variables cuya relación con el prejuicio fue probada con anterioridad. A partir de los resultados se retuvieron 18 ítems que replican las cinco dimensiones propuestas por los autores originales con indicadores de consistencia y validez interna satisfactorios. Además, se obtuvo evidencia favorable de validez convergente.
Rutinas de familias de ancianos ribereños amazónicos y reestructuración del papeles en la vejez
Authors: Nascimento Rodolfo Gomes , Cardoso Ronald de Oliveira , Santos Zeneide Nazaré Lima , Pinto Denise da Silva , Magalhães Celina Maria Colino
Published: May 2019

Basado en el ámbito de la Psicología del Desarrollo, este estudio tuvo como objetivo analizar la percepción de rutinas familiares de ancianos que viven en comunidades ribereñas del Amazonia. Usando tres herramientas metodológicas se investigaron cinco familias de ancianos residentes de islas fluviales del municipio de Cametá, Pará, Brasil. Los resultados revelaron que en esta etapa del ciclo de vida, las actividades de los ancianos en la comunidad y en las viviendas sufren cambios importantes en comparación con otras fases de la vida. Se destaca principalmente el cese de las actividades de subsistencia económica y la reestructuración de las  funciones en la rutina de los hombres ancianos ribereños, que se focalizan en las actividades domésticas junto con sus esposas.
ANALISIS PENENTUAN TARIF BERDASARKAN BIAYA OPERASIONAL KENDARAAN
Authors: Arifin Zainal , Khairunnisa Rizkia
Published: May 2019

PT. Mayasari Bakti merupakan perusahaan swasta yang menyediakan transportasi bus kota telah beroperasi  sejak 1969 di wilayah Jabodetabek. Salah satu jalur bus Mayasari Bakti adalah Bus PATAS  98A (Pulogadung-Kampung Rambutan) saat ini mengalami ketidak seimbangan antara biaya operasi dengan tarif yang ada dan biaya lainnya yang dikeluarkan operator. Tujuan dari penelitian ini adalah untuk mengetahui kelayakan ekonomi dan finansial Bus Route 98A dengan cara: BOK (Biaya Operasional Kendaraan) dan pendapatan dari tarif harus diterapkan. Dengan kapasitas 59 orang dan waktu perjalanan bus 1 jam 20 menit, maka faktor beban ideal adalah 70% untuk mencapai produktivitas per bus adalah 3,717 juta seat-km per tahun. Berdasarkan tingkat tarif faktor beban 70%, dapat dihitung angka produktivitas yang diperoleh per tahun, pendapatan kotor tahunan sebesar Rp 929 196 042, - Hasil analisis ekonomi sepanjang 5 tahun pengoperasian bus yang layak dengan tingkat bunga 14% dalam hal IRR dan NPV dalam kondisi normal ditambah kontingensi dan penurunan pendapatan. Agar operasi tetap berjalan, sebaiknya tetap memuat faktor beban dan produktivitas agar tidak terjadi penurunan pendapatan.
Studi Tekno-Ekonomi Bata CLC (Cellular Leightweight Concrete) Sebagai Pengganti Bata Konvensional
Authors: Nugroho Ananto , Triastuti Triastuti , Sumarno Agung , Widodo Eko
Published: May 2019

Cellular Lightweight Concrete  (CLC) merupakan salah satu teknologi beton aerasi yang dapat dikembangkan sebagai suatu usaha kecil dan menengah. Bata CLC memiliki karakteristik yang ringan dan baik untuk digunakan sebagai komponen non struktural seperti pada dinding bangunan. Sebagai usaha baru di pasar, bata CLC perlu dilakukan analisis tekno-ekonomi bata CLC sebagai pengganti bata konvensional berdasarkan proyek percontohan yang telah dilakukan. Dari proyek percontohan diperoleh produk CLC yang memenuhi standar persyaratan dengan nilai kerapatan 900-1000 kg/m3 dan kuat tekan sebesar 2.9 - 3.85 MPa. Hasil analisa tekno-ekonomi menunjukkan kelayakan finansial dengan nilai pengembalian investasi (ROI) sebesar 13.10%. Perbandingan biaya pekerjaan per meter persegi bata CLC juga menunjukan biaya yang lebih kompetitif bila dibandingan dengan bata merah biasa. Oleh karena itu bata CLC layak dikembangkan sebagai peluang usaha. Kata kunci : bata CLC, proyek percontohan, peluang usaha, tekno-ekonomi.
PENGARUH NILAI K PADA METODE K-NEAREST NEIGHBOR (KNN) TERHADAP TINGKAT AKURASI IDENTIFIKASI KERUSAKAN JALAN
Authors: Angreni Ida Ayu , Adisasmita Sakti Adji , Ramli M Isran , Hamid Sumarni
Published: May 2019

Melihat kelemahan dari metode penilaian kerusakan jalan secara visual, salah satunya hasil identifikasi yang bisa bersifat subyektif, maka perlu dibuat suatu algoritma atau metode untuk mengidentifikasi jenis kerusakan jalan. Langkah awal dari proses algoritma berupa pengambilan gambar dengan jenis kamera digital, dihasilkan citra digital. Citra tersebut digunakan untuk pengolahan citra dengan software Matlab untuk menentukan jenis kerusakan jalan secara tepat dan cepat. Pengolahan citra pada penelitian ini meliputi dua tahap, yaitu proses ekstraksi dengan tahapan: wiener filtering dan thresholding, sedangkan proses klasifikasi dengan metode KNN. Hasil yang diperoleh yaitu jenis kerusakan jalan yang dapat diidentifikasi meliputi retak dan retak kulit buaya. Tujuan penelitian adalah berapa besar pengaruh nilai k dari metode KNN terhadap tingkat akurasi jenis kerusakan retak dan retak kulit buaya. Ditemukan bahwa dengan uji coba nilai k yang berbeda-beda, yaitu 1, 8, dan 15, menghasilkan tingkat akurasi yang berbeda untuk tiap jenis kerusakan.Kata kunci :Kerusakan Jalan, Pengolahan Citra, KNN, Tingkat Akurasi
DIVISÃO INTERNACIONAL DO TRABALHO, PRECARIZAÇÃO E DESIGUALDADES INTERSECCIONAIS
Authors: Hirata Helena
Published: May 2019

O desenvolvimento do trabalho doméstico remunerado e do trabalho de cuidado nos últimos anos não se deve apenas, como se diz frequentemente, ao aumento do trabalho remunerado das mulheres e ao envelhecimento notável da população nos países industrializados, mas também é uma consequência da precarização do trabalho e do impacto do desemprego. Tal precarização não é apenas o resultado de um processo interno às sociedades estudadas, mas é também o fruto das “cadeias globais de afeto e de assistência” às quais se referem Cristina Carrasco e Arlie Hochschild. Para analisar o trabalho de cuidado como trabalho realizado principalmente por mulheres, negras, imigrantes e pobres, utilizaremos a teoria da interseccionalidade ou da consubstancialidade, que parte da afirmação da interdependência das relações de poder de gênero, raça e classe (KERGOAT).
ENTRE NEGOCIAÇÃO E MOBILIZAÇÃO: AS ESTRATÉGIAS DA CUT E DA FS FRENTE À REFORMA TRABALHISTA NO BRASIL
Authors: Colombi Ana Paula , , José Dari Krein Patrícia Rocha Lemos
Published: May 2019

O presente artigo tem a finalidade de analisar as primeiras estratégias adotadas pelas principais centrais sindicais do país – a Central Única dos Trabalhadores (CUT) e a Força Sindical (FS) – em resposta à reforma trabalhista aprovada em 2017. Para isso, na primeira seção, o artigo analisa os aspectos da norma que atingem o movimento sindical em três grandes frentes: a questão organizativa, a capacidade de negociação e a sustentação financeira das entidades sindicais. Em seguida, investiga o posicionamento da CUT e da FS e as estratégias por elas adotadas para enfrentar o novo cenário. Argumenta-se que a FS procurou reabrir os canais de diálogo com o governo na tentativa de rever as “falhas” da reforma trabalhista, apostando na estratégia de parceria social. Já a CUT abandonou essa estratégia e passou a investir na mobilização mediante a reaproximação com outros movimentos sociais na tentativa de barrar a reforma. Nesse difícil cenário, ambas apostaram na saída eleitoral com a finalidade de recompor as condições de diálogo social.
Big Data como fonte de inovação em museus: o estudo de caso do Museu Britânico
Authors: Motta Fernanda Miranda de Vasconcellos , Barbosa Cátia Rodrigues , Barbosa Ricardo Rodrigues
Published: May 2019

No cenário contemporâneo, os museus têm seus processos influenciados pelas transformações digitais. Eles são centros informacionais que têm o desafio de coletar, organizar, processar, distribuir e analisar um volume exponencial de dados, em formatos diversos, obtidos de diferentes fontes. A utilização do Big Data em museus possibilita a gestão e análise de dados complexos, gerando informações estratégicas que dão embasamento à gestão institucional. A partir dessa perspectiva, tem-se como propósito pesquisar, através do método de estudo de caso, os processos de gestão e análise de dados do Museu Britânico. Este é o segundo museu mais visitado do mundo e tem como diretriz estratégica ser um museu para o cidadão global, amplamente acessível. É possível observar que o uso de Big Data, no caso estudado, é fonte de inovação, estimulando o desenvolvimento dos projetos ResearchSpace - espaço colaborativo de criação, gestão e compartilhamento de conhecimento; e The Museum of The World - plataforma virtual interativa.
Fair Value versus Amortized Cost Measurement and the Timeliness of Other-Than-Temporary Impairments: Evidence from the Insurance Industry
Authors: Khan Urooj , Ryan Stephen G. , Varma Abhishek
Published: May 2019

We investigate the impact of recurring fair value versus amortized cost measurement for accounting recognition purposes on the timeliness of insurers' other-than-temporary (OTT) impairments of non-agency residential mortgage-backed securities (NAMBS) around the 2007–2009 financial crisis. Unlike largely predetermined amortized cost measurement, recurring fair value measurement requires firms to invest in information and control systems to assess relevant economic conditions and estimate fair values quarterly. We expect these systems discipline insurers' OTT impairments. Exploiting statutory requirements that PC (life) insurers measure securities with NAIC designations from 3 to 5 at fair value (amortized cost) and disclose security-level accounting information, we predict and find that PC insurers record timelier OTT impairments of the same NAMBS with NAIC designations of 3 to 5 than life insurers. We predict and find weaker evidence of spillover effects to the timeliness of OTT impairments of the same NAMBS with NAIC designations of 1 or 2.

JEL Classifications: G22; M41.

Data Availability: Data are available from public sources cited in the text.
Compensation Consultants and the Level, Composition, and Complexity of CEO Pay
Authors: Murphy Kevin J. , Sandino Tatiana
Published: May 2019

We provide fresh evidence regarding the relation between compensation consultants and CEO pay. First, firms that employ consultants have higher-paid CEOs—this result is robust to firm fixed effects and matching on economic and governance variables. Second, while this relation is partly due to consultant conflicts of interest, it is largely explained by the impact consultants have on the composition and complexity of CEO pay plans; notably, this impact fully mediates the consultant-CEO pay relation. Third, firms with higher-paid CEOs and more complex pay plans are more likely to hire a consultant. Last, Say-on-Pay voting patterns suggest shareholders view positively the advice consultants provide, but only when consultants provide no other services. We also find suggestive evidence of boards “layering” new equity incentive plans over existing ones, thereby increasing the impact of composition and complexity on CEO pay beyond the premium the CEO would demand for bearing additional compensation risk.

JEL Classifications: J33; M12; M52; M48.

Data Availability: Data are available from the public sources cited in the text.
Geotermikus koncessziós területek értékelésének hazai gyakorlata és a nyilvántartási rendszerekhez való viszonya
Authors: Zilahi-Sebess László , Boda Erika , Gulyás Ágnes
Published: May 2019

A tanulmányban röviden ismertetjük a hazai geotermikusenergia-nyilvántartási rendszert és a jelenleg a geotermikus koncesszióra javasolt területek értékelési rendszerét. Gyakorlati példán keresztül mutatjuk be, milyen jellegű módszertani háttér kidolgozása szükséges a nemzetközi geotermikus értékelési rendszerekhez való csatlakozáshoz, amelyre vonatkozóan javaslatot tettünk. A geotermikus kutatás szempontjából perspektivikus területek érték sor rendjének megállapításához a földtani, hidrogeológiai viszonyok mellett figyelembe kell venni a geotermikus energia kinyerésének megvalósíthatóságát és a gazdasági-társadalmi életképességet is, mely messze túlmutat a hazánkban elterjedt földtudományokon alapuló készletbecslésen. Geotermikus vagyon- és készletnyilvántartásra jelenleg nincs hivatalosan elfogadott nemzetközi szabvány, de általánosan elfogadott és használt az „Ausztrál/Kanadai Szabvány a kutatási eredmények, geotermikus vagyonok és geotermikus készletek jelentéséhez”. Bár célként megjelölhető a kanadai–ausztrál szemléletű vagyon- és készletnyilvántartáshoz közelítő hazai nyilvántartási rendszer kialakítása, a rend szerek közti harmonizáció nem oldható meg egyszerűen a meglevő nyilvántartási adatok átszámításával. A hazai gyakorlatban összemosódik a geotermikus vagyonszámítás és a geotermikus vagyonosztályozás. Megállapítottuk, hogy a jelenlegi hazai osztályozás nem feleltethető meg egyik nemzetközi rendszernek sem. A hazai geotermikus prognó zisokban általában volumetrikus készletbecslési módszert használnak, ezekben nem jelenik meg a kitermelhetőség fogalma. Tanulmányunkban a koncesszióra javasolt területek geotermikus ásványvagyon értékelésében a vízzel kiter melhető hőmennyiség és teljes hőmennyiség hányadosaként jelenítettük meg a kitermelhető készlet arányát, amivel a hagyományosan kitermelhető séget jellemezhetjük. Geotermikus készleteket csak ott lehet megállapítani, ahol geo termikus védőidom kijelölésre került, és abból megkezdődött a geotermikus energiatermelés. Jelenleg a készletszámítási adatok az elfogadott kutatási zárójelentés vagyonadatai alapján számszerűsíthetők, mivel geotermikus védőidom nem került még kijelölésre. Ahogy a védőidom területének nagysága a kívánt termelési mennyiségtől függ, hasonlóképpen a feltártság mértéke befolyással van egy terület értékére.
Problemas emergentes en medicina de zonas rurales
Authors: Troya Carlos
Published: May 2019

En la era de la <> y de la atención a las enfermedades crónicas, lograr una cobertura universal es relativamente simple en principio pero se torna difícil en la práctica.
Factores relacionados con la participación de Médicos de Familia del Ecuador en programas de Educación Médica Continua
Authors: Cuadrado Mauricio , Troya Carlos
Published: May 2019

Introducción: La Educación Médica Continua (EMC) es una etapa en la cual un médico recibe formación después de terminar su instrucción básica o cualquier estudio adicional. Como herramienta de educación, la EMC requiere el desarrollo de diversos niveles de aprendizaje (informativo, formativo y transformativo) por parte de los profesionales médicos.

Objetivo: Identificar los factores condicionantes para la participación en programas de Educación Médica Continua en un grupo de médicos de familia del Ecuador.

Metodología: Se realizó investigación cuantitativa, de diseño transeccional descriptivo, basada en una encuesta estructurada, con respuestas cerradas, que fue enviada a través de un correo electrónico. Las preguntas se orientaron a identificar factores relacionados con la participación en programas de EMC. Participaron 82 médicos de familia del Ecuador. Los resultados fueron tabulados en el programa estadístico SPSS, se usaron tablas de contingencia para la relación de variables y se aplicó chi cuadrado.

Resultados: Los factores que mostraron relación estadísticamente significativa con la participación en algún programa EMC fueron la satisfacción (p < 0.05) y el hecho de que en el sitio de trabajo faciliten el acceso a estos programas (p = 0.001). Otros factores estudiados no mostraron diferencias estadísticamente significativas

Conclusiones: La participación de médicos de familia en programas de EMC está condicionada por factores tanto internos como externos (la satisfacción de participar y el acceso laboral respectivamente), reflejando los vestigios de una enseñanza tradicional. Las instituciones educativas requieren reorientar sus programas de formación para sentar bases que permitan avanzar hacia nuevos modelos de aprendizaje.
El médico familiar rural en la sala de emergencia
Authors: Johnson Tara
Published: May 2019

Este artículo revisa la literatura médica que discute el conocimiento y las habilidades en medicina de emergencia que un médico de familia que practica en áreas rurales debe poseer. Adicionalmente, un médico de emergencias comparte recomendaciones para médicos de familia rurales basándose en un estudio epidemiológico que busca las principales quejas realizadas en un pequeño hospital en el Ecuador rural.

Objetivo: Conocer mediante una investigación bibliográfica, los conocimientos y destrezas que un médico de familia debe poseer en las salas de emergencia en zonas rurales.  .     

Metodología: Se realiza una breve revisión de la literatura médica sobre las recomendaciones para médicos familiares rurales en los EEUU.  Concluyendo con recomendaciones contextualizadas, para la formación de médicos familiares rurales en Ecuador.    

Resultados: La revisión de la literatura indica la escasez de especialistas en emergencias, en áreas rurales en los EEUU, y más aún en países como Ecuador,  y el impacto que puede significar un médico de familia rural con conocimientos y destrezas para  la atención de emergencias.  Algunas de esas destrezas son mencionadas para la formación de médicos familiares rurales en Ecuador incluyen: destrezas en Ecografía, competencia avanzada para liderar el soporte vital avanzado, y un conocimiento profundo del sistema de salud para saber cómo superar las limitaciones que presenta.

Conclusión: La falta de especialistas en emergencia en áreas rurales es una realidad en varios sitios en el mundo.  Una estrategia de corto plazo, es incluir en la formación de los médicos familiares, conocimientos y destrezas en la atención de emergencias.
Aedes albopictus en América del Sur y su relación con la distribución, y mantenimiento de enfermedades
Authors: Sippy Rachel , Moreira Fernando
Published: May 2019

Introducción: Ae. aegypti y Ae. albopictus son los vectores responsables de la transmisión de arbovirus en América Central y América del Sur. 

Objetivo: ERevisar los principales aspectos acerca de los vectores de arbovirus (Dengue, Chikungunya, y Zika), su llegada al continente, y los métodos de control de los dos vectores. 

Metodología: Se realizó una revisión de bibliografía utilizando los términos: vector, arbovirus, central america, south america.

Resultados: 21 estudios fueron revisados.  Existen diferencias importantes entre las dos especies de mosquitos con relación a los tres arbovirus de mayor impacto en la salud pública de la región: Dengue, Chikungunya, y Zika.  Dengue se transmite en las Américas desde hace 35 años a través de Ae. aegypti. En cambio,  Ae. albopictus llegó recién a Brasil en 1986 y América Central en 1988 por medio de mercancías, específicamente con el transporte de neumáticos usados.  Ha habido un éxito limitado en el control de la transmisión de los arbovirus por parte de los dos vectores con la introducción de la bacteria Wolbachia

Conclusiones: Se requieren más estudios para profundizar la relación entre vectores y los arbovirus para mejorar estrategias de control de transmisión de estas enfermedades cuyo impacto en la salud pública sigue creciendo.
A STUDY ON ENGLISH STUDENTS’ WILLINGNESS TO COMMUNICATE IN ENGLISH IN SOCIAL MEDIA
Authors: Maryansyah Yupika
Published: May 2019

This research aims to investigate factors affecting willingness to communicate in English in social media. This research was conducted in a descriptive method framework. Specifically, the research described factors that affect students' willingness to communicate in English in social media at English study program at the fourth semester of Muhammadiyah University of Bengkulu academic year 2018. The subjects of this research were fourth-semester students of English Education study program of Muhammadiyah University of Bengkulu Academic Year 2018 consisted of class A, B, and C.  The populations of the study were 77 students. The instruments used were questionnaire and interview. The data obtained from both questionnaire and interview were then analyzed by the process of checking, classifying, determining, and analyzing the data by using the percentage formula. The results of the study showed that there were five factors affecting willingness to communicate in English in social media. They were self-confidence, personality, motivation, attitude, and anxiety. The dominant factor was motivation since it had the highest percentage. In addition, the study also revealed some reasons why students have the willingness to communicate through social media.
TEACHER’S COGNITIVE AND AFFECTIVE VERSUS TEACHERS’ WRITING ASSESSMENT
Authors: Rahayu Endang Mastuti , Rahayu Endah Yulia
Published: May 2019

Many English teachers are not confident when they are required to examine their students essay although they have sufficient education and experience in assessing their students’ written works. Therefore, they need to be trained over a short period to rate their students’ writing.  They are also required to improve their knowledge or cognitive in order to literate ESL writing assessment to focus their students on learning to write and to edit their writing. Their affective or attitude to the feedback of writing assessment for writing instruction, the importance of writing assessment, the competence to administer the assessment, time-consuming writing assessment, the confidence of good writing instructor affect their quality in writing assessment. Therefore, in real practice of assessing writing, experienced teachers mostly plan and do their assessment based on what they believe about the assessment. Thus, successful assessing students’ writing does not only constitute the major portion of second language writing teachers’ workloads but also quantifies teachers affective factors. In addition, in administering assessments, teachers as raters need to care their students' and their own affectiveness, so students will value what they learn and teachers will pay attention more to their students’ learning.
Changes in chemical composition in blueberry fruit (Vaccinium corymbosum) during transport
Authors: Idaszewska Natalia , Janeba-Bartoszewicz Edyta , Bieńczak Krzysztof
Published: May 2019

Paper discusses the effect of vibrations at different frequencies on changes in the content of ascorbic acid and citric acid in blueberry fruit. Fruit was tested under incomplete maturity. The chemical com-position of fruits was compared immediately after harvest, stored and subjected to vibrations. The purpose of the research was to deter-mine the effect of vibrations on the degree of fruit ripeness. Studies have shown that vibrations at low frequencies did not affect changes in the chemical composition of blueberry fruit. Vibrations with a frequency of 28 Hz caused significant changes in the parameters tested in the fruit.
Flammability tests of materials used inside automotive vehicles
Authors: Kaczmarzyk Piotr , Lesiak Piotr , Warguła Łukasz , Waluś Konrad
Published: May 2019

This publication presents the flame propagation rates of tested materials according to PN-ISO 3795 requirements. Road vehicles and tractors, agricultural and forestry machinery - Determination of combustibility of materials used inside vehicles for upholstery taken from 15 different passenger car models and assessment of the possibility of using an alternative verification procedure flammability of products used in passenger cars.
Methods of extinguishing plastics used in the construction of means of public transport - factors affecting fire extinguishing efficiency
Authors: Pietrzela Dariusz , Skorupka Katarzyna , Kubis Daria
Published: May 2019

The article analyzes the methods of extinguishing plastic materials, mainly polymer ones, occurring in the construction of means of public transport, ie. buses, trams, trains, metro etc. The characteristics of flammability and decomposition reactions were discussed and this was confronted with the characteristics of wood decomposition as an interchangeable material in extinguishing tests according to the Polish standard PN-EN 3-7 "Portable fire extinguishers - Part 7: Characteristics, performance requirements and test methods" due to the com-mon occurrence of these firefighting devices in both buses and other public transport. In addition, other methods of extinguishing means of public transport resulting from current trends, i.e. aerosol systems and water mist, have been indicated. The extinguishing methods were confronted, indicating their advantages, disadvantages and application possibilities in means of public transport, including buses..
Assessment of the usability of Variable Message Signs on the example of Szczecin
Authors: Sosik Katarzyna
Published: May 2019

The transport telematics is understood as a concept that facilitates efficient and effective traffic management. The goal of the work was to assess the application of the chosen solution of Intelligent Transport Systems in terms of its usability / functionality for road users. The research was conducted by means of a direct questionnaire and concerned the area of application of VMS variable message signs in Szczecin.
Driver assistance system for improved safety during coupling and reversing maneuvers
Authors: Stobnicki Paweł , Zembrowski Krzysztof , Bajerlein Maciej , Dubowski Adam , Rakowicz Aleksander
Published: May 2019

The paper presents the research of the two-cameras driver assistance system (SWK-2) during maneuvers of coupling the car with gooseneck type NGS-9.6 and during reversing maneuvers with the whole unit. The SWK-2 driver assistance system is used when coupling a set of vehicles and allows the driver to perform this as one-man operation. Fixing the wireless camera under the trailer's ramp allows the driver full control when reversing the whole unit. It also affects the improvement of the driver's safety and increases safety during the reversing maneuver.
The level of noise In the surroundings of public transport vehicles
Authors: Trzyniec Karolina
Published: May 2019

The article discusses the problem of excessive noise levels In the city. Especially, this concerns Communications noise, which is caused by public transport, such as: trans, buses and trams. The level of noise emitted by these vehicles was analyzed, ta king into account different hours and the measured values were compared with the limit values set In the normative documents (the Regulation of the Minister of the Environment of June, 14, 2017)
Basic characteristics of networks with self-similar traffic simulation
Authors: Aleksander Marek , Odarchenko Roman , Gnatyuk Sergiy , Kantor Tadeusz
Published: May 2019

This paper is devoted to simulations the networks with self-similar traffic. The self-similarity in the stochastic process is identified by calculation of the Herst parameter value. Based on the results, received from the experimental research of network performance, we may conclude that the observed traffic in real-time mode is self-similar by its nature. Given results may be used for the further investigation of network traffic and work on the existing models of network traffic (particularly for new networks concepts like IoT, WSN, BYOD etc) from viewpoint of its cybersecurity. Furthermore, the adequacy of the description of real is achieved by complexifying the models, combining several models and integration of new parameters. Accordingly, for more complex models, there are higher computing abilities needed or longer time for the generation of traffic realization..
Modal analysis of an underwing search-light fairing
Authors: Bednarz Jarosław , Lisowski Wojciech
Published: May 2019

Many applications of aircraft require using dedicated elements of equipment attached to the fuselage or wings. These elements change aerodynamic properties of the aircraft. They modify spatial mass distribution and local stiffness in the attachment place. Structural dynamics of the modified airframe is usually investigated with use of the numerical analysis techniques. Verification of results of such the analysis is carried out experimentally. The basic method of testing is the experimental modal analysis. In the paper, there is presented an exemplary application of the experimental modal analysis to testing of a modified airplane structure with a search-light covered by its fairing attached under a wing. The described experiments consisted of the ground as well as the in-flight tests. The paper reports description and results of the experiments.
Analysis of the possibility of limiting the settling of sewage sumps installed in roadways
Authors: Bednarz Jarosław , Targosz Jan , Wiederek Jacek
Published: May 2019

The article concerns the discussion of a pneumatic tail lift entirely powered by pneumatic devices powered with compressed air from the brake system of truck. The authors try to set up the drive parameters and the size of the engines. For this purpose, a computer simulation of the platform's motion was made on the basis of which the torques of pneumatic engines were determined and the times of falling and lifting.
Examination of technical condition of three- and four wheeled vehicles – problems and possibilities
Authors: Filipczyk Jan
Published: May 2019

The aspects of examinations of tree- and four-wheeled vehicles in the scope of road safety and problems resulting from the improper infrastructure of control stands for tests of this type of vehicles have been presented in this paper. The results of tests of technical conditions of 80 vehicles including 35 vehicles that were permitted to move on public roads and the structure of faults affecting the road safety have been analysed. New solutions of equipping control stands which may facilitate the examinations of atypical vehicles have been proposed.
Prevention of the corrosion of trailers and trailers used in transport of road
Authors: Gil Leszek , Pawełczak Ireneusz , Jaczewski Michał
Published: May 2019

The article discusses solutions for anti-corrosion protection of trailer and trailer’s elements. Due to the different operating conditions, the protective coating of metal elements must be resistant to chemical substances in a dry and wet environment that stimulates corrosion processes. Corrosion resistance must also be ensured on elements subjected to locally high stresses and thermal loads that prevail during the operation of trailers in road transport. The study also defines the criteria and methods for the selection of coatings to protect surfaces exposed to corrosion.
The system of acquisition and archiving of motion parameters of mobile systems - mathematical methods, digital filters
Authors: Grabiński Jakub , Waluś Konrad
Published: May 2019

The work presents numerical methods and digital filters that enable correction of the measurement signal obtained during experimental tests of vehicle motion parameters. The inertial navigation measuring module used consists of three-axis accelerometers, gyroscopes made in MEMS technology and a magnetometer. The collected measurement data made it possible to refer them to a point in three-dimensional space in order to determine the trajectory of vehicle movement. The article presents numerical methods of rotation of the local coordinate system to the global system and selected digital filters enabling smoothening the measurement signal in real time.
The influence of hydrogen addition for exhaust gas emission in SI gas engine
Authors: Grab-Rogaliński Karol
Published: May 2019

One of the major problems in internal combustion engines is emission of pollutants with exhaust gases. Those pollutants are not only harmful for environment but also for humans. To decrease emission of pollutants many mechanical and chemical methods are used in internal combustion engines especially in exhaust system such as TWC, DPF, SCR. Alternative way for decrease in exhaust gas pollutants is use of alternative fuel as a primary energy carrier or as an additional fuel for base hydrocarbon one. In this studies the hydrogen was used as a additional fuel to methane. Both fuels were delivered to intake manifold. The share of the fuel was 100/0 methane/hydrogen and 70/30 methane/hydrogen. The addition of hydrogen to base fuel shown decrease of exhaust pollutants from engine and increase in engine operating parameters.
Analysis of fuel properties applied at a structure of aircraft
Authors: Janeba-Bartoszewicz Edyta
Published: May 2019

The article presents the current status of liquid fuels used in aviation. The physicochemical properties of these liquids are discussed against the background of the type of aviation and mission. Aviation fuels are mixtures of hydrocarbons most often obtained from conservative or processing crude oil, supplemented with additives improving their exploitation properties. Currently, aviation fuels occur in two basic types: fuels for turbojet engines and fuels for piston engines. The basic fuel for commercial air transport and military aviation is fuel for turbo-propeller engines. Synthetic compounds and various types of alternative fuels are used more rarely as aviation fuels. A specific role is played by hydrazine used in the emergency power supply system of aircraft, for example, in multi-purpose fighter planes F-16.
The use of mobile devices to register aircraft maintenance data
Authors: Kaleta Ryszard , Niczyj Janusz
Published: May 2019

In the article there were described main processes of operational faze of aircraft conducted during services. The description particularly focuses on the use of mobile devices for registering data from services. There were considered the attributes of the system of operational faze of military aircraft. A mobile system was described as addition to stationary systems for supporting operational faze of aircraft and upgrade by detailed data collected with the use of the new technology. It is demonstrated that we are able to provide constantly data to data base and conduct standard and specific analyses of a threat for safety of operational faze having a proper configuration of special software which takes into account individual features of the type of an aircraft and with the use of mobile devices. A user can automate processes of preventive treatment within organisation using the same type of aircraft based on this data..
Test methods development of biomechanics of human movement utilizing the kinesiological electromyography
Authors: Kukla Mateusz , Wieczorek Bartosz , Warguła Łukasz
Published: May 2019

The article presents the issues concerning the development of methods for performing human biomechanics research utilizing kinesiological electromyography. The procedures concerning the selection of the location of electrodes, patient preparation for testing, conducting the experiment and the development of measurement results are dis-cussed in detail. Selected preliminary test results were also presented.
Computer-based management system for reliability and operational readiness of the integrated communication system for military helicopters
Authors: Lewitowicz Jerzy , Szelmanowski Andrzej , Pazur Andrzej , Janik Paweł
Published: May 2019

Paper presents the possibilities of computer-based data recording system, constructed and maintained in the Air Force Institute of Technology (AFIT) Division for Avionics, used among others to manage the operational readiness of the integrated communication system ZSŁ. It was shown that the data collected in the database can be used to determine and evaluate operational parameters, including reliability and operational readiness, which is one of the necessary element when it comes to an effective operation of the ZSŁ system, built on board Polish Armed Forces helicopters.
Factors affecting safety of handling ultra large container vessels in Port of Gdańsk
Authors: Pawelski Jan , Piotrzkowski Wiesław , Śniegocki Henryk , Wilczyński Przemysław
Published: May 2019

Paper discussed important factors affecting handling of ULCS (ultra large container ships) in Port of Gdańsk. In recent years more such vessels had been calling Gdańsk, including new generation o ULCS called Triple-E launched by Maersk. Studies conducted in Maritime University confirmed feasibility of safe handling of such large vessels but pointed to several factors needed to be taken under consideration to provide required safety level for ship handling operations. Author analysed factors responsible for safe handling ULCs in Gdańsk.
Preliminarny studies on scratch resistance of the face shields surface of firefighting helmets
Authors: Pieniak Daniel , Walczak Agata
Published: May 2019

Nowadays, in rescue operations firefighters of the State Fire Service use firefighting helmets which protect their head. Type B helmets in accordance with PN EN 433 technical norm are most often used. The face shields of firefighting helmets are usually made of transparent polycarbonate. One layer of metalized coatings, usually made in PVD technology are often applied on the shield surface. Sometimes multi-layer and gradient coatings are also applied. The surface of a visor may get damaged. Surface damages limit the field of rescuer view, and also adversely influence on barrier properties of the shield. One of the utility criterion for face shields and glasses of firefighting helmets is scratch resistance. Comparative studies on scratch resistance of surface were performed. The test was conducted with the use of Rockwell diamond cone. Small differences in scratch resistance were shown. The mechanism of surface degradation due to scratch of studied shields were varied. The highest resistance against the indenter was obtained in case of the shield surface of the Kontekst helmet. The lowest surface degradation was observed for the helmet with the shield face covered by metalized coating - Gallet. The face shields of helmets without coating were characterized by higher dam-ages. The highest damage was obtained in case of the Kontekst helmet.
Energy aspects of using of water-hydrocarbons emulsion as a fuel for diesel engines
Authors: Sitnik Lech , Dworaczyński Maciej , Haller Piotr
Published: May 2019

The recent development of internal combustion engines (ICE) goes towards the meeting of increasingly stringent requirements imposed to reduce toxic exhaust emissions and fuel consumption and thus to strive for carbon dioxide abatement and against depletion of global natural resources. The research on engines fuelled by water-hydrocarbons emulsions has already a long tradition. So far, tests were based on emulsions obtained in chemical reactions. In this paper, similar analysis results have been presented, but the water-fuel emulsions used for the tests were obtained with making use of the cavitation effect. For this reason a unique cavitator was developed, which was then used to produce water-hydrocarbons emulsions of common, mineral and synthetic diesel fuel. Both of these fuels as well as their water emulsions with 20% water content by volume, were used for tests. The ESC (European Stationary Cycle) test conditions were determined and the engine was tested on engine dynamometer in accordance with the predetermined ESC test conditions. During the tests, under close scrutiny, engine emission and fuel consumption levels were measured . The tests it be more time repeat (with every liquid to engine fuelling was 34 times) to achieve the statistical assessment of the results. By the use of emulsions was found to result in a significant reduction in the consumption of diesel fuels . This result is statistically significant.
Educational manipulation robot
Authors: Jakubiec Beata , Sokoliński Krystian
Published: May 2019

The article presents a project of the small articulated, educational robot with five degrees of freedom. There were described elements of the mechanical part of the structure and the control system based on LabVIEW and the Arduino platform. Apart of steerage and simple programming of manipulators movements, a measuring system was created using the created graphical interface. It allows you to register and visualize the basic parameters of the robot servo drives. The system consists of two basic components: the subsystem of current acquisition and servo voltages, the data processing subsystem. The developed system allows for an easy presentation of the construction and operation of the manipulator in the course of teaching in the field of automation and robotics.
Computer modeling of electrical coil characteristics dedicated for helmet-mounted cueing systems with magnetic method
Authors: Szelmanowski Andrzej , Pazur Andrzej , Żokowski Mariusz , Janik Paweł , Paterek Wojciech
Published: May 2019

Paper presents the importance of the helmet-mounted cueing systems in the field of flight safety increasing and mission execution effectiveness. There are presented the selected helmet systems used in the foreign and domestic solutions, utilizing the magnetic method. An original method of pilot’s helmet angular position determination utilizing the magnetic field from single flat coil and quaternion calculus is presented. The valuable elements are given mathematical relationships describing the characteristics of the magnetic field generated by selected types of electric coils as well as the results of simulation tests and the laboratory experimental verification of a flat coil model (designed in the Air Force Institute of Technology - AFIT) with a given number of coils.
Optimization of diesel engine dynamics with electronic boost controller
Authors: Dobrucký Branislav , Drgoňa Peter , Hanko Branislav , Morgoš Ján
Published: May 2019

This paper dals with design of optimized electronic control for diesel engines for all-terrain vehicles. In paper the detailed proposal of control algorithm, as well as procedure for turbocharger innovation is described. Designed optimization algorithm is verified on real Land Rover Defender vehicle. In last part of paper, the measurements on electrodynamic dynamometer are discussed.
AGV autonomous transport units in technological transport
Authors: Hyla Paweł , Szpytko Janusz , Rumin Rafał , Cieślik Jacek , Blaut Jędrzej
Published: May 2019

The article discusses a number of aspects related to the application of surface autonomous technological transport vehicles. The attention of the authors is mainly focused on issues related to the location of the technological means of transport in the working space, planning the traffic trajectory for the implementation of the transport task, technical possibilities in mapping the working space and intelligent method of control of AGV vehicles focused on efficiency. The article synthetically collects key information on key aspects related to the efficient management of both individual AGVs and their entire teams.
Transport potential of ferries handled at the Ferry Terminal Świnoujście
Authors: Kamińska Izabela
Published: May 2019

The aim of the article is to determine the transport potential of fleet employed in the Świnoujście Ferry Terminal. The article presents the characteristic of ferries and infrastructure of the Ferry Terminal Świnoujście and utilization to service cargoes and passengers. The analysis concerns the potential of handling ferries and cargoes. The volume of ferry transport is characterized. The article presents the use of the loading area for serviced ferries and the reloading capacity of ferry stands.
Mathematical models used to describe the properties of magneto-rheological elastomers
Authors: Kukla Mateusz , Talaśka Krzysztof , Malujda Ireneusz
Published: May 2019

The paper presents and discusses mathematical models that are most widely used to describe the properties of magnetorheological elastomers (MREs). Magnetic elastomers are non-traditional engineering materials with an ever increasing number of practical applications in various areas of industry including transport..
Safety of the ship structure and installations powered by LNG fuels in relation to the Bureau Veritas rules and IGF Code requirements
Authors: Stachów Jakub
Published: May 2019

The article presents generally selected issues regarding the safety of ship structures, fuel containment systems, processing and preparation of LNG liquefied gas as fuel for marine propulsion systems and generating sets, in relation to certain requirements of the IGF Code and the provisions of the classification society Bureau Veritas rules. The publication presents the fundamental criteria and assumptions of the IGF Code, which may be taken into account when creating the concept and design of units powered by LNG fuel, also considering the limits of air pollution emissions from ships defined in Annex VI of the MARPOL Convention.
Concrete floors surface hardened in logistic centers
Authors: Gmaj Ireneusz
Published: May 2019

The article describes the types of floors in logistics centers. Ways of securing them for maintenance. The concept of concrete floor and the principle of its execution at the construction stage were explained. Chemical reactions occurring in concrete and their impact on durability and durability in operation are presented. At the end, the correct ways of maintaining concrete floors are presented, preserving their proper-ties for a long period of use.
Road transport safety – case study
Authors: Kijewska Kinga , Kaczorowska Magdalena
Published: May 2019

One of the main tasks of transport is moving people or goods to specific places using appropriate means of transport. In recent years on the roads we can see increase number of private cars, trucks or public transport. The consequence of this situation is a decrease road safety, related to the lack of an adequate level of caution by drivers. The increasing number of accidents contributes to the costs related to their consequences e.g.: costs of removing damages, treatment costs. City authorities implement a variety of solutions aimed at increasing road safety. These activities include the reorganization of intersections, as well as the use of telematics tools, i.e. the introduction of systems allowing the identification of vehicles and the measurement of their speed. The article presents the concept of improving safety on the selected section of road located on the Duńska street. The article is financed under the grant for the Young Scientist 3/MN/IZT/2018..
Studying the impact of amendments in the Polish guidelines on the values of basic geometric parameters of railway lines
Authors: Błaszkiewicz Dorota , Szabłowska Paulina
Published: May 2019

The article discusses changes in domestic regulations related to de-signing geometric systems of railway lines. Also, a model of calculating the basic parameters of geometric systems performed for three different (extreme) design examples was presented. The calculations were performed according to two guidelines
Determinants of ship management
Authors: Jendryczka Violetta
Published: May 2019

Paper discussed The indicated preliminary analyzes show incomplete knowledge about shaping the ship management model. It is difficult to determine the best way to manage a ship. Defining the main threat for this watercraft, ie: collision, grounding, terrorist attack will allow more accurate assessment of determinants that depend on the type of ship.