bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of the Effect of Diamond Powder on the Thermal Properties of Octadecane Using Differential Scanning Calorimetry
Authors: Godlewski Wojciech , Sierakowski Mateusz , Domański Roman , Kapuściński Jakub , Wiśniewski Tomasz , Kubiś Michał 
Published: October 2019

Abstract
The purpose of this work was to examine the effect of diamond powder on the thermal properties of phase change materials on the example of octadecane. The experiment involved mixing of diamond powder with a specific granulation with the aforementioned representative of the alkanes group. Two different grain sizes were used: 50 and 250 micrometres. The change of specific heat, latent heat of phase change and degree of supercoiling in newly formed mixtures was compared to the pure forms of the phase-change materials used. Initial mixing with a glass-stirring rod showed strong stratification for each granulation due to the low viscosity of the mixture and too large differences between component densities. It was decided to add amorphous silicon dioxide to the mixtures, which increases density of the mixture. The optimal percentage of amorphous silicon dioxide was estimated experimentally. Measurements of thermal parameters were carried out using DSC technology. The results of the tests of specific heat and latent phase transition heat showed that with the increasing content of diamond, the specific heat of the mixture decreases almost twice, and the latent heat can decrease by up to three times. The effect of diamond powder on reducing the degree of supercoiling of the mixture was also observed. An important observation was that the mixture with higher granulation of diamond powder had greater tendency for sedimentation. This method could be used to increase thermal conductivity and diffusivity of phase change materials and make them viable for use in systems that require cooling at high rate or temperature stabilization, such as control systems in electronic vehicles or aviation industry and at the same time decrease the degree of supercoiling which could increase the efficiency of system.
Quasi-Homogenous Model of Electrochemical Machining of Turbine Engine Parts
Authors: Kozak Jerzy 
Published: October 2019

Abstract
In order to increase the efficiency of jet engines hard to machine nickel-based and titanium-based alloys are in common use for aero engine components such as blades and blade integrated disks (BLISK). Electrochemical Machining (ECM) provides an economical and effective method for machining high strength and heat-resistant materials into complex shapes with high material removal rate without tool wear and without inducing residual stress. This article presents the physical and mathematical models of electrochemical shaping used in the manufacture of turbine engine parts. The modelling is based on the assumption that the multi-phase mixture filling the gap is treated as two-phase quasi-homogenous medium. The model describes the workpiece shape evolution in time, distribution the local gap size, flow parameters such as the static pressure and the velocity, temperature and void fraction as result of gas generation. The major features of the numerical computer program are briefly described with a selected example of machining a typical turbine blade. The results of computer simulation of effects of setting parameters ECM on accuracy-machined profile are discussed. The improvement of accuracy has been reached by using described sequence of ECM and Pulse ECM processes.
Wind Tunnel Tests of the Tu-154M Aircraft Aerodynamic Characteristics
Authors: Krzysiak Andrzej 
Published: October 2019

Abstract
Determination of possible manoeuvres to be performed by the aircraft requires knowledge of its aerodynamic characteristics including, in particular, characteristics of the aircraft at configuration with deflected control surfaces. In this article, the wind tunnel tests results of the model of passenger Tu-154M aircraft manufactured at the scale 1:40 are presented. The model was designed and manufactured by the Military University of Technology based on the Tu-154M aircraft geometry obtained by full-scale object scanning. The model mapped all aircraft control surfaces, along with the gaps between these surfaces and the main wing part.
During the tests all the model’s control surface like, flaps, ailerons, spoilers, slots, rudder, elevator and tail plane were deflected at the same deflection angles range as they are used in the full scale aircraft. The aerodynamic characteristics of the tested Tu-154M aircraft model were measured by the 6-component internal balance. Based on the obtained measurements the aircraft model aerodynamic coefficients were calculated. In the article the basic aerodynamic characteristics of the tested Tu-154M aircraft model i.e. lift, drag coefficients as well as pitching, yawing and rolling moment coefficients versus model angles of attack and sideslip angles were presented.
The tests were performed in the Institute of Aviation low speed wind tunnels T-1 of the 1.5 m diameter test section at the undisturbed velocity, V∞ = 40 m/s.
Cooled Turbine Cantilevered Nozzle Mounting and Sealing System
Authors: Rzeszutek Leszek , Kaczmarek Grzegorz 
Published: October 2019

Abstract
Small advanced turboprop and turboshaft engines, with two-stage high-pressure turbine (HPT), need to meet several challenges. Described herein is an exemplary solution adopted for a cantilevered HPT nozzle mounting and sealing system that helped to meet requirements for size constraint and sealing of split lines and mounting features. Since clearances do not scale down with engine size due to manufacturing tolerances, there is a very limited space available between first and second stage rotors to secure HPT nozzle and to provide means of cooling air supply. Due to small diameters, cavities and size of the parts and assembly access becomes very difficult and precluded the use of typical solutions – like supply air spooilers – known from bigger engines. Relatively larger clearances require also efficient solution for sealing leakage, which was achieved by means of high-temperature braided “rope seals”. The nozzle segments have weight effective hook-type outer band mounting to HPT outer casing and are axially retained by HPT shroud with a snap ring. The hook cavities were used as pockets for rope seals that are subsequently compressed during assembly making it more difficult. However, by special design of the pockets and parts engagement sequence, the assembly process was optimized even though it is so called blind assembly. The sealing system function is not only reducing leakages that are detrimental to a turbine efficiency, but also allow for pressurizing the cavity between the nozzle outer band and HPT outer casing with cooling air thus preventing from hot gas ingestion by higher back-flow margin (BFM) resulting in higher durability of the turbine.
Helicopter Flight Simulation based on URANS Solver and Virtual Blade Model
Authors: Stalewski Wieńczysław , Surmacz Katarzyna 
Published: October 2019

Abstract
The methodology of simulation of a rotorcraft flight has been developed and applied to simulate several stages of flight of light helicopter. The methodology is based on coupling of several computational models of Computational Fluid Dynamics, Flight Dynamic. The essence of the methodology consists in calculation of aerodynamic forces acting on the flying rotorcraft by solving during the simulation the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations. In this approach, the rotorcraft is flying inside the computational 3D mesh modelling the space filled with the air. The flight simulation procedure is completely embedded in the URANS solver ANSYS FLUENT. Flow effects caused by rotating blades of main or tail rotor are modelled by application of the developed Virtual Blade Model (VBM). In this approach, real rotors are replaced by volume discs influencing the flow field similarly as rotating blades. Time-averaged aerodynamic effects of rotating blades are modelled using momentum source terms placed inside the volume-disc zones. The momentum sources are evaluated based on the Blade Element Theory, which associates local flow parameters in the blade sections with databases of 2D-aerodynamic characteristics of these sections. Apart of the VBM module, two additional UDF modules support the simulation of helicopter flight: the module responsible for modelling of all kinematic aspects of the flight and the module gathering the momentary aerodynamic loads and solves 6 DOF-Equations describing a motion of the helicopter seen as solid body. Exemplary simulation of helicopter flight, starting from a hover, through an acceleration and fast flight until a deceleration and steep descent, has been discussed.
Hérnia de Bochdalek: Relato de Caso
Authors: Da Silva Fábio Ribeiro Azevedo , Pereira Fernanda Costa , Bugner Phillipe , Kaluf Isabela de Oliveira , Simieli Isabela , Daher Bruna Lima 
Published: October 2019

Objetivo: Relatar um caso de hérnia de Bochdalek em adulto e discutir sua prevalência e manifestações clinicas. Relato de caso: Paciente masculino, 37 anos, deu entrada na emergência queixando-se de dor abdominal difusa e continua há cinco dias, associada a dispneia, náuseas, vômitos fecaloides, inapetência, parada de eliminação de flatos e fezes. O quadro era refratário ao uso de antieméticos e antiácidos. Nega história de traumas. Ao exame, abdômen distendido, ruídos hidroaéreos aumentados e doloroso à palpação. Realizada tomografia, com sinais sugestivos de abdômen agudo obstrutivo. Foi submetido a laparotomia exploradora de urgência e identificado saco herniário em região póstero-lateral esquerda do diafragma com estrangulamento de colón. Considerações finais: A hérnia de Bochdalek comumente manifesta-se em neonatos. Em adultos, sua ocorrência é rara, predominando à direita e em mulheres. Pode apresentar-se com sintomas gastrintestinais e respiratórios inespecíficos e quadro agudo de encarceramento ou perfuração. Há, portanto, a necessidade de raciocínio clínico para seu diagnóstico associado a técnicas de imagem.
Using Bayesian Model Selection to Advise Neutron Reflectometry Analysis from Langmuir-Blodgett Monolayers
Authors: McCluskey Andrew , Arnold Tom , Cooper Joshaniel F. K. , Snow Tim 
Published: October 2019

The analysis of neutron and X-ray reflectometry data is important for the study of interfacial soft matter structures. However, there is still substantial discussion regarding the analytical modelsthat should be used to rationalise relflectometry data. In this work, we outline a robust and generic framework for the determination of the evidence for a particular model given experimental data, byapplying Bayesian logic. We apply this framework to the study of Langmuir-Blodgett monolayers by considering three possible analytical models from a recently published investigation [Campbell et al., J. Colloid Interface Sci, 2018, 531, 98]. From this, we can determine which model has the most evidence given the experimental data, and show the effect that different isotopic contrasts of neutron reflectometry will have on this. We believe that this general framework could become an important component of neutron and X-ray reflectometry data analysis, and hope others more regularly consider the relative evidence for their analytical models.
MODULAR BAMBOO STRUCTURE DESIGN EXPLORATION WITH DEPLOYABLE CONSTRUCTION SYSTEM
Authors: Dwiana ; Anastasia Maurina Yosafat Bakti 
Published: October 2019

Abstract- Deployable structure is a type of structure that can be transformed from a closed configuration to an open configuration. This structure can be assembled and disassembled with ease. This easy construction is a reason why deployable structure is the right structure for after disaster scenario. In emergency, natural resources are needed since it can be found and used easily. Bamboo is a common plant that can be found everywhere in Indonesia. Research have been done by UNPAR’s architecture lecturer regarding deployable structure (deployable spatial and deployable planar) with bamboo as its material. It says that deployable spatial structure has easier and shorter time in instalation than deployable planar structure. Deployable spatial structure has tons of room for development. Some development that can be done is to make deployable structure module to be duplicated in every direction, and to implement self locking mechanism in this structure. This research is done to find deployable structure module that can be duplicated in every direction, and also implementing self locking mechanism in this structure Method that used in this research is qualitative by comparing some buildings that implementing deployable system (Resiploy and Triangle Prism) and modular system (Rising Canes and Y-BIO). The comparastion result is opportunity and thread from each building. This result which is opportunity and thread from each building then synthesized to find criteria for deployable structure that can be duplicated in every direction. Based on the research, it can be concluded that in deployable structure, nut and bolt is needed so that some building element can be rotated to create a movement. In modular building, we need a simple system that can be used in every joint so that building can be duplicated in every way with ease. Reciprocal structure is needed to make a building with self locking mechanism. By simplifying Resiploy’s joint and using Rising Canes’s modules, we can make a deployable structure that can be duplicated in every way with self locking mechanism Key Words: bamboo structure, deployable, modular, self locking mechanism
Filosofia-scienza e religione, i nuovi percorsi tracciati da Hans Jonas
Authors: Michelis Angela 
Published: October 2019

Il pensiero di Jonas, in particolare quello della sua seconda fase, dedicato alla filosofia della biologia, apre nel confronto filosofico con la scienza nuovi spazi di riflessione critica per la filosofia e per le scienze stesse. In tale incontro entrambe si arricchiscono, acquisendo maggior coscienza metodologica e ampliando le prospettive di osservazione dei fenomeni. Sorge, così, in modo rinnovato, la possibilità di nuove soluzioni interpretative, che, ponendosi al di là di desueti schieramenti ideologici, riescano a comprendere più in profondità la complessità della realtà epocale a cui ci troviamo di fronte e dunque aumentino la capacità di governarla.
Alasdair MacIntyre e o tomismo: notas sobre Three Rival Versions of Moral Inquiry/Alasdair MacIntyre and Thomism: notes on Three Rival Versions of Moral Inquiry
Authors: Sousa José Elielton 
Published: October 2019

O texto tematiza o tomismo em Alasdair MacIntyre, especialmente em Three Rival Versions of Moral Inquiry, mostrando como MacIntyre se apropria metodologicamente de ferramentas conceituais oriundas do tomismo para resolver os problemas que afligem a teoria e a prática moral contemporânea. Trata-se, portanto, de uma leitura hermenêutica do modo como MacIntyre se apropria do tomismo nessa obra específica, mas sem esgotar os elementos que compõem tal apropriação. Abstract: The paper thematizes the presence of thomism in Alasdair MacIntyre, especially in his book Three Rival Versions of Moral Inquiry, by showing how MacIntyre appropriates methodologically conceptual tools coming from Thomism in to solve the problems that afflict the contemporary moral theory and practice. It is, therefore, a hermeneutic reading of how MacIntyre appropriates Thomism that particular work, but without exhausting the elements of such appropriation. Keywords: Tradition. Methodological Thomism. Hermeneutics.
Sobre a educação do filósofo-rei e o argumento central da República de Platão/On the education of the philosopher-king and the central argumentoOf Plato’s Republic
Authors: Paula Henrique Gonçalves de 
Published: October 2019

Neste artigo pretendemos demonstrar como o argumento central da República de Platão que institui o filósofo como o indivíduo virtuoso por excelência e chefe político da cidade justa pode ser lido de modo a evitar a crítica de recentes estudiosos da obra que pretendem que a caracterização geral da educação filosófica descrita no plano pedagógico da República é incapaz de fornecer ao filósofo o elemento indispensável ao seu alto posto moral e político: a sabedoria prática para dirigir sua vida moral íntima e governar a cidade justa. Tal questão será resolvida dentro da problemática em que se insere através de uma correta interpretação sobre o que significa o conhecimento da Forma do Bem à filosofia platônica bem como de uma correta compreensão da concepção de educação que norteia Platão em sua obra.Abstract: In this paper we try to show how to read the main argument of Plato’s Republic, that proclaims the philosopher as the truly virtuous person and political chief of the just city, in order to avoid the criticism of recent scholars who declare that the general characterization of the philosophical education described in the pedagogical scheme of the Republic is unable to provide the philosopher with the essential element of his high moral and political status: the practical wisdom to guide his own moral life and govern the just city. This question will be clarified along with all the issues involved in the correct interpretation of the meaning of the knowledge of the Form of Good in the platonic philosophy and a correct understanding of Plato’s general conception of education. Keywords: Plato. Republic. Education. Form of the Good. Philosopher-King.
Using participatory research to explore the oral health awareness of junior and senior high students at L.Y. Cairns School
Authors: Ho Karen , Kaliszuk Ilona , Gitzel Barbara , Keenan Louanne 
Published: October 2019

Introduction. Vulnerable populations, such as school-aged adolescents with mild cognitive disabilities, can be partners in the creation of interactive learning tools. Objectives. This participatory qualitative study involved teachers and school-aged adolescents in the creation of artwork that answered 4 questions: 1) What does a healthy mouth look like? 2) What does an unhealthy mouth look like? 3) What foods keep your teeth healthy?, and 4) What are some healthy teeth habits? Methods/Results. Three teachers and their 33 students provided artwork that depicted their answers to the 4 questions, and written descriptions. The researchers coded the artwork individually and grouped the data into 4 major categories: Healthy vs. unhealthy (yellow teeth, pain); Lifestyle (no smoking, visiting the dentist), healthy habits (brushing, flossing); and Foods and Nutrition (fruits and vegetables - to eat, soda pops and pizza - to avoid). A four-minute-long video featuring animations of the students’ artwork was created professionally to showcase their knowledge and facilitate an interactive learning tool. Conclusion. Co-learning between researchers and participants fostered positive, collaborative learning within the community. Significance. This study provided insights into an effective strategy for creating oral health education tools for the learners, by the learners. The video presentation will be used by dental hygiene students to engage vulnerable populations in a discussion about oral health.
تضحية الذات لدى منتسبي الحشد الشعبي العراقي
Authors: سلومي صلاح عدنان ناصر 
Published: October 2019

يعد مفهوم تضحية الذات عصري النشأة على الصعيد النفسي فهو وسيلة الشعوب في الدفاع عن اوطانها والموت من اجلها، كما اشارت الدراسات النفسية الى علاقه عكسية بين تضحية الذات و متغيرات نفسية منها الانانية والنرجسية، فضلا عن آثار تضحية الذات الايجابية ومنها اشاعة المحبة والتآلف. وفي ضوء ما تقدم سعت الدراسة الى تحقيق الأهداف التالية: بناء اداة لقياس تضحية الذات، وقياس تضحية الذات لدى منتسبي الحشد الشعبي العراقي. ولتحقيق ذلك قام الباحث ببناء مقياس تضحية الذات، إذ اتبع في بناءه كل الإجراءات الإحصائية السيكومترية، وتم التأكد من صدق فقراته الظاهري استناداً إلى آراء الخبراء في القياس النفسي كما تم استخراج التمييز باكثر من طريقة فضلا عن صدق البناء، وفيما يخص ثبات المقياس فقد تم استخراجه من خلال عدة طرق منها إعادة الإختبار حتى وصل الى صورته النهائية ، وبعد ان اصبح المقياس جاهزاً تم تطبيقه على عينة البحث المختارة وفق الطريقة الطبقية العشوائية والبالغة (600) منتسباً في الحشد الشعبي العراقي، وبعد معالجة البيانات إحصائياً تم استخراج التباين والانحراف والوسط الحسابي والفرضي وبعد تطبيق الاختبار التائي لعينة واحدة توصل البحث إلى وجود متغير تضحية الذات لدى منتسبي الحشد الشعبي العراقي. وبناءا على ما خرجت به نتيجة البحث الحالي يمكن للباحث ان يوصي بضرورة عمل الدولة العراقية على تعزيز كل سلوكيات التضحية مدنية كانت ام عسكرية من خلال تعويض العائلة التي فقدت معيلها واعطاء الرتب العسكرية لمن يقدم التضحيات، كما اقترح الباحث إجراء دراسة مقارنة في تضحية الذات على وفق متغير الحالة الاجتماعية (المتزوجين، العزاب).
الأسس القانونية لتحديد القانون الواجب التطبيق على النزاع المحكم فيه -دراسة في مشروع قانون التحكيم التجاري العراقي لعام 2011-
Authors: شكير حسنين جبار 
Published: October 2019

بسبب تزايد التبادلات التجارية في الميدان الدولي بين الشركات والامم، اصبح التحكيم حاجة ملحة ينظر له باعتباره قضاء اصيلا للمنازعات الناشئة عنها. وقد ادركت الدولة العراقية الدور المتعاظم للتحكيم، وخصوصا بعد التحولات التي شهدها البلد، واهمها انتقاله من السوق الموجه الى السوق الحرة، وما صاحب ذلك من جلب للاستثمارات الاجنبية لغرض تحقيق التنمية الاقتصادية. فكانت تلك الظروف بمثابة المبرر الرئيسي للجوء الى التحكيم وتطوير احكامه في مشروع قانون يتبنى المبادئ السائدة في مجال حسم المنازعات ، ذات الطابع الدولي على وجه الخصوص . ورغم تأثر مشروع قانون التحكيم التجاري العراقي لعام 2011 بالاتجاهات السائدة بمسائل التحكيم ، الا انه لا زال حرياً بالدراسة والتقويم ، للاستفادة من الملاحظات التي ثبتها العاملون والمهتمون بالتحكيم على قانون الاونسيترال النموذجي للتحكيم التجاري الدولي المعدل لعام 2006، ومنها تحديد القانون الواجب التطبيق على موضوع النزاع المحكم فيه.
وتبرز اهمية البحث بالنظر الى تميز القواعد التي كرسها المشروع في تحديد القانون الواجب التطبيق على النزاع المحكم فيه، عن القواعد التي تحكم تنازع القوانين في مجال العقود ، سواء من حيث ارادة الاطراف في الاختيار او من حيث سلطة المحكم في تحديد قانون النزاع. فما هو القانون الواجب التطبيق على موضوع النزاع المحكم فيه؟ وما هو دور ارادة الاطراف في تحديد القانون الواجب التطبيق على النزاع في التحكيم التجاري الدولي؟ وهل يلتزم المحكم بما يلتزم به القاضي من قواعد ومبادئ لتحديد القانون الذي يحسم النزاع ؟ وما هو الاثر الذي يترتب على مخالفة المحكم لما تقرره ارادة الاطراف في الاختيار؟ . كل ما تقدم من الاسئلة سنحاول الاجابة عنها على وفق المنهج التحليلي في مبحثين ، نتناول في المبحث الاول تكريس حرية الاطراف في اختيار قانون النزاع ، وفي المبحث الثاني تكريس سلطة المحكم في اختيار قانون النزاع .