bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aspects concerning the physical-mechanical characteristics of low-noise asphalt mixture
Authors: Stirb Adelin , Marc Paul , Forton Andrei 
Published: August 2022

Abstract
As the traffic increases in urban areas, the noise generated by the vehicles has become a major concern during the last decade and many countries have been looking for solutions to reduce the level of disturbance. The lowering of the noise level by choosing the correct type of asphalt mixture may be considered as an alternative to sound-absorbing walls.
The use of these low-noise asphalt mixtures requires a previous verification of the technical conditions and the performance levels they need to meet.
The paper presents the research and laboratory tests aimed at comparing the physical-mechanical characteristics of a maximum 16mm grain size bituminous concrete (BA16) with a low-noise bituminous concrete used in the wearing course of bituminous pavements.
This research started from the fact that the Romanian design standard for asphalt mixtures does not stipulate the physical-mechanical characteristics required by a low-noise asphalt mixture. Thus, in order to clarify this matter, the physical-mechanical characteristics of a 16mm grain size laboratory-made bituminous concrete (BA16) were compared to the characteristics of a low-noise asphalt mixture presented by the specialized literature.
The results obtained following laboratory testing of the asphalt concrete and the research of the specialized literature concerning low-noise asphalt mixtures confirm the differences as far as their physical-mechanical characteristics are concerned (voids, bulk density, dry density, Marshall stability and flow and stiffness modulus).
Influence of the Parallel Beam Load Cell installation on the Strain/Stress Field reading error
Authors: Stefan Mocanu , Radu Panaitescu-Liess , Oana Tonciu , Catalin Francu 
Published: August 2022

Abstract
Parallel beam force transducers are used for the purpose of determining the masses of bodies and are essentially devices that react, both quantitatively and qualitatively, to a specific physical scalar integer (in this case, the mass of the element to be measured). The load being measured is converted into an electrical signal using such a device. The operating principle is based on Hooke’s law, i.e., there is a linear relationship between strains and stresses within proportional limits. The authors of this article make some general observations on possible errors associated with the installation of parallel beam force transducers.
Kinerja Traksi Sepeda Motor Roda Tiga Pada Berbagai Kondisi Jalan dan Muatan
Authors: Atmika I Ketut Adi , Suriadi I Gusti Agung Kade 
Published: August 2022

Belakangan ini berkembang kendaraan niaga yang berbasis sepeda motor yang digunakan untuk berdagang atau pengangkutan sampah. Kurangnya akselerasi dan beberapa kali ditemukan kecelakaan kendaraan sepeda motor roda tiga karena tidak mampu mengatasi kondisi jalan belok maupun dipaksakan mengangkut barang yang berlebih, membutuhkan kajian dan analisa performa traksi kendaraan sepeda motor roda tiga. Penelitian dilakukan dengan menguji karakteristik daya torsi engine kendaraan sepeda motor roda tiga pada chassis dynamometer. Karakteristik tersebut menjadi bagian simulasi pada system drive train sepeda motor roda tiga untuk mendapatkan kinerja traksi kendaraan. Hasil penelitian menunjukkan adanya traksi yang tidak terpakai dari perpindahan transmisi pertama sampai kelima. Analisa traksi kendaraan model tanpa muatan mampu mengatasi tanjakan maksimum sebesar 20,590, sedangkan tanjakan maksimum dengan muatan 100 kg mencapai 15,840 dan dengan muatan 150 kg mencapai 14,200. Kendaraan model tanpa muatan mampu melewati berbagai medan jalan sedangkan dengan beban 100 kg hanya mampu melewati jalan aspal basah dan kendaraan model dengan beban 150 kg tidak mampu melewati berbagai kondisi jalan
Recently, there has been a development of commercial vehicles based on motorcycles that are used for trading or transporting garbage. The lack of acceleration and several three-wheeled motorcycle accidents were found because they were unable to cope with turning road conditions or forced to carry excess goods, requiring a study and analysis of the traction performance of three-wheeled motorcycles. The research was conducted by testing the characteristics of the engine torque of a three-wheeled motorcycle on a chassis dynamometer. These characteristics are part of the simulation on the three-wheeled motorcycle drive train system to obtain vehicle traction performance. The results showed that there was unused traction from the first to the fifth transmission shift. Traction analysis of an unloaded model vehicle is able to overcome a maximum incline of 20,590, while the maximum incline with a load of 100 kg reaches 15,840 and with a load of 150 kg it reaches 14,200. The model vehicle without a load is able to pass through various terrains, whereas with a load of 100 kg it is only able to pass through wet asphalt roads and a model vehicle with a load of 150 kg is unable to pass through various road conditions.
Evaluasi Sifat Bending, Tarik dan Morpologi dari Komposit Polyester/Serbuk Serat Hibiscus Tiliaceus setelah diperlakukan dengan NaOH
Authors: Sari Nasmi Herlina , Pandiatmi Pandri , Dyah Sulistyowati Emmy , Sinarep Sinarep , Pandiatmi Pandri , Wirawan I Made , Suteja Suteja , Akhyar Sutaryono Yusuf , Sujita Sujita , Hermansyah Rozan , Rama Setiyadi Muhammad 
Published: August 2022

Telah diinvestigasi komposit poliester yang dimodifikasi dengan serbuk dari serat hibiscus tiliceus (HT) sebagai inovasi dari material komposit yang baru. Penelitian ini bertujuan untuk menyelidiki sifat mekanik dari komposit dari serbuk hibiscus tiliaceus (HT) setelah direndam dalam larutan alkali dalam periode berbeda. Sebelum dibuat komposit, serbuk HT direndam dalam alkali NaOH 5% selama waktu berbeda yaitu 2, 4 jam, 6 jam, dan 8 jam. Teknik pembuatan komposit dilakukan dengan teknik hand lay-up; resin poliester sebagai matrik dengan hardener dari metil etil keton peroksida 1% dicampur, kemudian dituang ke dalam cetakan dan diberi tekanan 5 MPa selama 12 jam. Sifat kekuatan tarik, modulus elastisitas dan kekuatan bending telah dievaluasi. Hasil studi menunjukkan bahwa lama perendaman serbuk HT dalam NaOH memberikan efek pada sifat mekanik dari komposit serbuk HT/polyester. Setelah serbuk direndam dalam NaOH selama 2 jam, 4 jam dan 6 jam, kekuatan tarik dan bending dari komposit meningkat yang dikaitkan dengan ikatan interface antara serbuk HT-poliester bertambah kuat, tetapi kekuatannya menurun setelah serbuk direndam selama 8 jam karena serbuk HT rusak dan pullout. Analisa SEM menunjukkan morpologi patahan yang rapat dan padat antara serbuk dan poliester serta adanya serbuk HT pullout. Ditinjau dari kekuatan tariknya, komposit yang dihasilkan ini dapat menjadi alternatif pengganti komposit serat gelas.
A polyester composite modified with powder from Hibiscus Tiliceus fiber as a new composite material. This study aims to evaluate the mechanical properties of the composite of Hibiscus tiliaceus (HT) powder after being immersed in an alkali solution for different periods. Before making the composite, the HT powder was immersed in 5% NaOH for times; 2, 4, 6, and 8 (hours). The composite manufacturing technique has been carried out using the hand lay-up technique; polyester resin as a matrix with a hardener of 1% methyl ethyl ketone peroxide mixed, then poured into molds and under the pressure of 5 MPa for 12 h. The properties of tensile strength, modulus of elasticity, and bending strength have been evaluated through tensile and bending tests. The results showed that the tensile and bending strengths of the composite increased after the HT powder was soaked from 2 h to 6 h; it is due to an increase in the interfacial bond between the HT powder-polyester, but the composite strength decreased after the powder was soaked for 8 h because the HT powder was damaged and powder pullout occurs. SEM analysis shows a tight and dense interface between the powder and polyester and the presence of HT powder pullout. In terms of tensile strength, the resulting composite can be an alternative to glass fiber composites.
Karakteristik Papan Komposit dengan Menggunakan Kulit Salak Sebagai Filler Komposit
Authors: Hadi Wibowo Cahyo , Sunardi Sunardi , Lusiani Rina 
Published: August 2022

Papan partikel atau papan komposit adalah komposit yang terbuat dari partikel kayu atau serat alam yang diikat dengan perekat sitetis atau bahan pengikat lain. Komposit papan partikel dominan diaplikasikan sebagai furniture. Untuk menjaga penurunan bahan baku kayu dalam pembuatan furniture maka dilakukan inovasi berupa campuran bahan alam untuk komposit papan partikel. Tujuan penelitian ini adalah untuk mengetahui pengaruh dari variasi fraksi volume kulit salak dan serbuk kayu masing-masing 20% 45%, 32,5% 32,5% dan 45% 20%, dengan perbandingan tetap pada resin epoxy dan lem PVAc masing-masing 15% dan 20%. Komposit papan partikel ini dibuat melalui perlakuan NaOH 5%, meshing 40 mesh dan proses kompaksi dengan tekanan 30 bar selama 120 menit menggunakan cold press single punch. Karakteristik terbaik pada komposit papan partikel terdapat pada varian 2 dengan komposisi kulit salak 32,5% dan serbuk kayu 32,5% terbukti dari nilai fisik dan mekaniknya yaitu densitas 0,953 g/cm3, pengembangan tebal 7,27%, impak 3,11 kj/m2, gaya maksimal 133,658 N dan batas elastisitas 1,882 GPa.
Particleboard or composite board is a composite made of wood particles or natural fibers bonded with synthetic adhesives or other binding materials. Particleboard composites are dominantly applied as furniture. To maintain the decline in wood raw materials in the manufacture of furniture, innovations were made in the form of a mixture of natural materials for particle board composites. The purpose of this study was to determine the effect of variations in the volume fraction of snakefruit leather and sawdust respectively 20% 45%, 32,5% 32,5% and 45% 20%, with a fixed ratio of epoxy resin and PVAc glue respectively 15 and 20%. This particleboard composite was made through 5% NaOH treatment, 40 mesh meshing and compaction process with a pressure of 30 bar for 120 minutes using a cold press single punch. The best characteristics of particleboard composites are found in variant 2 with a composition of 32,5% snakefruit leather and 32,5 wood powder as evidenced by its physical and mechanical values, namely density 0,953 g/cm3, thickness expansion 7,27%, impact 3,11 kj/m2, the maximum force is 133,658 N and the elastic limit is 1,882 GPa.
Optimasi Pengaruh Parameter Terhadap Sifat Mekanis pada Sambungan Similar Baja Tahan Karat AISI 304
Authors: Tina I Putu Agus , Budiarsa I Nyoman , Santhiarsa I G usti Ngurah Nitya 
Published: August 2022

Kekuatan sambungan dan sifat las titik dipengaruhi oleh beberapa faktor seperti ketebalan pelat, ukuran strip, waktu pengelasan, tegangan dan beban yang diberikan selama proses las. Sambungan dalam hal ketebalan dan ukuran diameter kerucut dalam pembuatan nugget sangat penting saat menghubungkan panel saat merakitbodi sebagai bagian yang menentukan kelayakan dan keselamatan transportasi. Periksa sambungannya. Secara umum, banyak penelitian telah dilakukan pada pengelasan titik tentukan parameter yang dapat mempengaruhi hasil las. Pengujian tarikdan teknik pengelasan titik uji digunakan untuk menentukan kekuatan sambunganlembaran baja tahan karat. Optimasi Pengaruh Parameter Terhadap Sifat Mekanis Pada Sambungan Similar Baja Tahan Karat AISI 304. dimana pada spesimen 1.26V 4mm tegangan maksimum 119 MPa, spesimen 1.26V 5mm tegangan maksimum 76 MPa, spesimen 1.26V 6mm tegangan maksimum 131 MPa, spesimen 1.37V 4mm tegangan maksimum 215 MPa, spesimen 1.37V 5mm tegangan maksimum 122 MPa, spesimen 1.37V 6mm tegangan maksimum 71 MPa, spesimen 1.48V 4mm tegangan maksimum 104 MPa, spesimen 1.48V 5mm tegangan maksimum 76 MPa, spesimen 1.48V 6mm tegangan maksimum 49 MPa. Jadi dari hasil ke 9 pengujian dengan menggunakan voltase dan taper berbeda nilai tegangan maksimum yang tertinggi yaitu pada spesimen (137V,4mm) Hal ini karena sampel ujisampai benar-benar mengalami ekstraksi atau perpindahan yang maksimal dibandingkan sampel lainnya.
The strength of the joint and the properties of the spot weld are affected by several factors such as plate thickness, strip size, welding time, stresses and loads applied during the welding process. The connection in terms of thickness and size of the cone diameter in the manufacture of nuggets is very important when connecting panels when assembling the body as a part that determines the feasibility and safety of transportation. Check the connection. In general, a lot of research has been carried out on point welding to determine the parameters that can affect the welding results. Tensile testing and test point welding techniques are used to determine the joint strength of stainless steel sheets. Optimizing the Effect of Parameters on Mechanical Properties at Similar Connections of AISI 304 Stainless Steel. Where in the specimen 1.26V 4mm maximum stress is 119 MPa, specimen 1.26V 5mm maximum stress is 76 MPa, specimen 1.26V 6mm maximum stress is 131 MPa, specimen 1.37V 4mm maximum stress 215 MPa, specimen 1.37V 5mm maximum voltage 122 MPa, specimen 1.37V 6mm maximum voltage 71 MPa, specimen 1.48V 4mm maximum voltage 104 MPa, specimen 1.48V 5mm maximum voltage 76 MPa, specimen 1.48V 6mm maximum voltage 49 MPa. So from the results of the 9 tests using different voltages and tapers, the highest maximum voltage value is in the specimen (137V,4mm). This is because the test sample actually experiences maximum extraction or displacement compared to other samples.
Mathematical Modeling and Analysis for COVID-19 Model by Using Implicit-Explicit Rung-Kutta Methods
Authors: Ameen Pirdawood Mardan , Mohammed Rasool Hemn , Abid Sabawi Younis , Faris Azeez Berivan 
Published: August 2022

One of the most common health care problems globally is COVID-19, and also there are an international effort to monitor it have been proposed and discussed. Despite the fact that many studies have been performed based on clinical evidence and confirmed infected cases. However, there is room for additional research since a range of complex criteria are included for later research forecast. As a consequence, mathematical modelling mixed with the numerical simulations is an effective method for estimating main propagation parameters and forecasting disease model dynamics. We study and present some models for the COVID-19 in this paper, which can answer significant questions concerning global health care and implement important notes. The IMEX Runge–Kutta and classical Runge–Kutta methods are two well-known computational schemes to find the solution for such system of differential equations. The results, which are based on these numerical procedures suggested and provide estimated solutions, provide critical answers to this global problem. The amount of recovered, infected, susceptible, and quarantined people in the expectation can be estimated using numerical data. The findings could also aid international efforts to increase prevention and strengthen intervention programs. The findings could also support international efforts to increase prevention and strengthen intervention programs. It is clearly that the proposed methods more accurate and works in a very large interval in time with a few step sizes. That is consequently beginning to a decrease in the computational price of the method. Numerical experiments show that there is a good argument and accurate solutions for solving this type of problem.
أثر الاستثمار الأجنبي المباشر في الأداء المالي: دراسة تحليلية لبيانات عينة من الشركات الاجنبية العاملة في قطاع النفط والغاز في إقليم كوردستان العراق للمدة من 2009-2018
Authors: Ahmad Mohammed Shivan , Mohammed Abdulrahman Ibrahim 
Published: August 2022

تسعى هذه الدراسة إلى تحقيق أثر الاستثمار الاجنبي المباشر في الأداء المالي للشركات متعددة الجنسيات خلال مدة الدراسة، وتم تطبيق مجموعة من المؤشرات والنسب المالية لتحليل البيانات التاريخية للشركات الاجنبية عينة الدراسة للمدة من (2009-2018)، فضلاً عن تطبيق عدد من الاساليب الاحصائية لتحليل العلاقة بين متغيرات الدراسة.
وتوصلت الدراسة إلى مجموعة من الاستنتاجات، أهمها هي: تنصب أغلب استثمارات الشركات عينة الدراسة في فرع إقليم كوردستان العراق، وتعد ذلك اهتمام هذه الشركات الاجنبية باقتصاد الإقليم، وهذه دلالة على مدى اعتماد الشركات الرئيسة على فرع الإقليم، كما وتبين من التحليل المالي للدراسة أن فرع الإقليم له تأثير كبير على أداء الشركة الرئيس. واعتماداً على ما توصلت إليه الدراسة من الاستنتاجات؛ تم تقديم مجموعة من المقترحات منها: دراسة عدة بدائل مختلفة من اجل اختيار البديل الأفضل والاستفادة أكثر من الاستثمار.
The Effect of the First and Second Stress Invariants (Hydrostatic and Deviatoric Stresses) on the Compressibility Function
Authors: Sahm Resen AbdulAmir 
Published: August 2022

Experimental work was carried out to investigate the separate roles of the hydrostatic and deviatoric components of stress tensor (Using the First and the second invariants and ). The results were expressed in term of stress dependent shear compliance and apparent compressibility function in the time temperature region of the test (up to seconds at the region of the relaxation).
The Compressibility Function showed no significant change, when increasing the hydrostatic stress and keeping the deviatoric stress constant, and by varying and keeping constant the change is about 10 for the stress combination of tension-torsion.
The volume was found to increase with time when increasing and keeping constant.
In the case of and the deviatoric stress played the major role. All these effects could be rationalized by the idea of the time dependent free volume. If the free - volume increases with time by increasing this could explain the difference in the effect of and on and explain the creep less than recovery.
There is no difference between the compressibility function in creep and recovery (to within the experimental scatter of ()).
A small increase in B was detected with time, the maximum difference between the lowest and highest is .
Cancelamentos Cirúrgicos Eletivos em um Hospital Público de Goiás
Authors: Póvoa Ribeiro Bruna , Emanuel Silva Mota Elias , Raquel Camisão Agnês , Alves de Araújo Lilhian , de Oliveira e Silva Neto Oliveiros 
Published: August 2022

Objetivo: Identificar as causas envolvidas nos cancelamentos de cirurgias eletivas em um hospital público do interior do estado de Goiás. Método: Estudo de caráter descritivo, retrospectivo e de aspecto quantitativo, desenvolvido por meio da análise de prontuários impressos e arquivados na sala de faturamento da unidade hospitalar selecionada para estudo, referente ao total de cirurgias eletivas canceladas no período de janeiro a dezembro dos anos 2018 e 2019. Resultados: Os cancelamentos foram divididos em: relacionados ao paciente, materiais, equipamentos e instituição, sendo prevalente os relacionados ao paciente devido as condiçoes clinicas, especialmente picos hipertensivos no período pré-operatório (7,56%). Os cancelamentos ocorreram, em sua maioria, no período vespertino, a média de idade dos pacientes no momento dos cancelamentos foi de 47 anos e não houve disparidades significativas em relação ao sexo. O valor da taxa de suspensões para os anos analisados foi de 5%. Conclusões: A comunicação efetiva entre a equipe assistencial e administrativa do hospital, bem como com o próprio paciente, pode viabilizar a diminuição dos cancelamentos cirúrgicos a partir do enfoque em uma assistência sistematizada e segura.
Políticas económicas e interculturalidad en La Guajira colombo-venezolana
Authors: Muñoz-Rojas Delvis , Martelo-Gómez Raúl , Ruiz-Cabezas Meri 
Published: August 2022

Se realizó un diagnóstico basado en la información dada por El Consejo Nacional de Política Económica y Social CONPES, el (DANE) y la Ley 191 de 1995, quien deja claro las situaciones que se está viviendo en estas regiones de fronteras en la parte: de Salud, social, político, económico, cultural y financiero las cuales se encuentran deterioradas además de observarse falta de profundización en la cultura y en la interculturalidad en donde hay que reconstruir a una sociedad sometida al abandono del estado. La metodología se soportó con base en la información suministrada por el DANE, para el año 2013, así mismo, se tomó la documentación del CONPES 3085 del año 2014, y Documento base Plan Fronteras para la Prosperidad, bajo la ley 191 de 1995. En el desarrollo de la temática se desprenderán dos temas importantes: La Cultura o la Interculturalidad en la Frontera y Resignificación de la frontera como un problema de estado y gobernabilidad. De igual manera se proponen estrategias y acciones para cambiar las situaciones en las fronteras teniendo en cuenta las propuestas por el autor y por la información dada por el CONPES. Se concluye sobre la intención de promover la consideración de la riqueza étnico-cultural de las fronteras y la protección especial que merecen estas comunidades Consolidación de procesos de integración cultural binacional. Finalmente, implementar una política diferencial para estos pueblos o comunidades para fortalecer los vínculos binacionales de nuestra frontera.
Relación entre el inventario de autorregulación para el aprendizaje (SRLI) y algunos factores internos que inciden en el proceso enseñanza- aprendizaje de la química
Authors: Fong-Silva Waldyr , Tarón-Dunoyer Arnulfo , Colpas-Castillo Fredy 
Published: August 2022

Se realizó un análisis de las causas que afectan el proceso de enseñanza-aprendizaje en el área de la química en cinco programas de ingeniería de la Universidad de Cartagena, encontrando que este problema ha ocasionado aumento en la deserción estudiantil en la facultad de ingeniería de la Universidad de Cartagena durante los últimos años. Esta investigación fue desarrollada en tres (3) fases en las cuales se realizaron encuestas a un número estimado de mil doscientos cincuenta (1250) estudiantes de los programa de Ingeniería de la Universidad de Cartagena a través de un instrumento de recolección de información denominado Inventario de autorregulación para el Aprendizaje (SRLI), el cual consta de cuatro (4) subescalas: ejecutiva, cognitiva, motivación y control del ambiente, las que estudiadas con los factores internos: edad, sexo y motivación, muestran que el factor que tiene relevancia estadística relacionado con el SRLI es el factor motivante a un nivel de confianza del 95%.