bluuebunny/crossref_metadata_2025 huggingface dataset:
Arbitrary lagrangian-eulerian formulation of quasistatic nonlinear problems
Authors:   , Rodríguez Ferran Antonio
Published: October 2023

En esta tesis se presenta una metodología para la simulación numérica de procesos cuasistaticos en mecánica de sólidos no lineal, basada en una formulación arbitrariamente lagrangiana-euleriana (ale) del problema. Se hace un enfoque generalista, que abarca algunas cuestiones fundamentales en mecánica computacional y en análisis numérico: la resolución de sistemas no lineales de ecuaciones algebraicas y la integración de las ecuaciones constitutivas no lineales. Como entorno de trabajo se utiliza un código orientado al objeto, una herramienta muy útil en tareas de investigación pues proporciona un lenguaje interactivo de programación altamente conceptual. Este lenguaje permite implementar y estudiar los algoritmos numéricos de manera sencilla y eficaz.

Las principales aportaciones del trabajo son:

(1) La adaptación de distintos métodos para la resolución de sistemas no lineales de ecuaciones a la técnica de los multiplicadores de lagrange: desarrollo de algoritmos, análisis de convergencia e implementación numérica.

(2) El desarrollo de una estrategia para el análisis del orden del error de esquemas numéricos de integración de las ecuaciones constitutivas no lineales en mecánica de sólidos con grandes deformaciones, y la aplicación de dicha estrategia a dos algoritmos.

(3) El tratamiento unificado de la formulación ale de problemas cuasistaticos y dinámicos

(4) El desarrollo de algoritmos para el tratamiento de los términos conectivos en las ecuaciones constitutivas ale.
Anells cordals:propietats estructurals i models de comunicacions
Authors:   , Barrière Figueroa Eulalia
Published: October 2023

En els darrers anys hi ha hagut un gran desenvolupament de la recerca en l'àrea de les xarxes informàtiques. En aquest context, la utilització dels grafs com a models per a les xarxes, on els nodes són ordinadors o processadors interconnectats, que s'han de comunicar entre ells de la manera més eficaç possible, ha donat lloc a gran quantitat de treballs. Quan es tracta de xarxes d'interconnexió, en què el nivell d'integració és elevat, es solen considerar models amb bones propietats de simetria, que permeten definir i analitzar els algorismes amb més facilitat. Per exemple, els grafs de Cayley són grafs definits a partir de l'operació d'un grup. Això permet utilitzar l'estructura algèbrica subjacent per a la resolució dels problemes.
Aquesta tesi tracta de les propietats d'una família de grafs, els anells cordals de grau 3, que són grafs de Cayley sobre el grup de simetries d'un polígon regular o grup dièdric. Aquest grup no és commutatiu, però els seus elements satisfan bones relacions. A més, està molt relacionat amb el grup cíclic, i això fa que els anells cordals tinguin molt a veure amb els grafs circulants.
Una part important del treball és l'estudi de les propietats estructurals dels anells cordals, mentre que en una segona part es donen algorismes de comunicació punt a punt, o encaminaments, amb bones propietats, i d'intercanvi d'informació entre tots els nodes, o gossiping. Aquestes dues parts del treball estan interrelacionades, ja que les propietats estructurals dels grafs s'utilitzen en les definicions i en l'anàlisi dels algorismes que es proposen en la segona part i, a la vegada, l'estudi de problemes de comunicacions ha motivat el plantejament de problemes de caire més teòric, com la classificació per isomorfisme dels anells cordals, la caracterització del seu grup d'automorfismes o el càlcul de l'aresta bisecció.
Part de l'interès d'aquest treball és l'ús de les tessel.lacions per a la representació dels grafs. Aquesta eina s'ha revelat molt útil en l'estudi de propietats mètriques i de problemes en què s'han d'establir camins entre els nodes, ja que en facilita la visualització. Les altres famílies de grafs que han estat estudiades per diversos autors mitjançant tessel.lacions del pla són, sobretot, els grafs circulants de grau 4, en què s'utilitzen quadrats per representar els vèrtexs, i de grau 6, en què s'utilitzen hexàgons. Per als anells cordals de grau 3 s'han utilitzat triangles. En particular es veu com la tessel.lació determina totalment el graf, i les propietats del graf es tradueixen en propietats de la tessel.lació.
Es poden citar com a problemes oberts la generalització dels resultats a altres famílies de grafs, i l'estudi d'altres problemes de comunicacions. En particular, per al problema del càlcul de l'índex òptic, es tenen alguns resultats en el cas d'anells cordals aresta transitius, que utilitzen la caracterització del grup d'automorfismes i la definició d'encaminaments amb bones propietats presentats en aquesta tesi.
La Casa pompeyana referencias al conjunto de casas-patio realizadas por L. Mies van der Rohe en la década 1930-1940
Authors:   , Ravetllat Mira Pere Joan
Published: October 2023

La casa patio fué, sin duda, uno de los grandes temas en la vida de Mies. Al igual que la villa aislada, el rascacielos de cristal o el gran contenedor de estructura externa, la definición de una vivienda introvertida alrededor de patios atrajo el interés del arquitecto durante un considerable período de tiempo. Su continuada dedicación, tanto académica en la Bauhaus y posteriormente en el I.I.T., como profesional durante más de diez años, indican el explícito interés por la configuración de dicho modelo residencial
El objetivo de este trabajo es precisar las referencias ideológicas y arqui-tectónicas que sustentan el modelo de casa patio desarrollado por Mies van der Rohe alrededor de la década 1930 40, en directa relación a las culturas clásicas, y de manera específica, a la Casa Pompeyana. La reflexión sobre las relaciones con el esquema residencial pompeyano es el hilo argumental, que, distante de aproximaciones arqueológico historicistas, propone descubrir puntos de contacto en las realidades arquitectónicas y los criterios que subyacen tras ellas.
Una primera parte se centra en la descripción y análisis del período pompeyano, desde sus orígenes etruscos en el s.VIII a.C. hasta la erupción del Vesubio en el año 79 d.C. Una sucinta historia de Pompeya enmarca el contexto evolutivo en el que la casa atrio etrusca incorpora el peristilo oriental a través de las influencias griegas en la zona del Golfo de Nápoles. El análisis compositivo espacial de las residencias pompeyanas introduce algunas de las constantes, que permitirán referirnos a un cierto modelo al que poder esta-blecer, posteriormente, comparaciones analógicas.
En el mismo sentido, una breve aproximación biográfica a Mies pretende, en la segunda parte, incidir en las influencias recibidas por el arquitecto desde los años de colaboración en el estudio de P.Behrens, hasta su etapa de director de la Bauhaus en 1930.
La tercera parte es un análisis del conjunto de casas patio realizado por Mies en la década 1930 40, estructurado desde tres aproximaciones que hacen referencia a su tipología, composición e ideología, respectivamente.
En el primero de dichos capítulos se intenta mostrar la existencia de unas constantes que permitirán adscribir dichas residencias a un cierto tipo. La aproximación compositiva, a la que alude el segundo capítulo, se inicia con una comparación a los término, que configuran la arquitectura en la definición vitruviana. Un tercer y último capítulo señala la clásica decantación de los valores abrazados por Mies, a partir de finales de los años veinte, en su aspiración de fundir arquitectura y arte. La influencia de los enunciados neoplásticos reaparece en las casas patio en la incorporación de pinturas murales y esculturas integradas al conjunto.
Some digital signature schemes with collective signers
Authors:   , Herranz Sotoca Javier
Published: October 2023

Digital signatures are one of the most important consequences of the appearance of public key cryptography, in 1976. These schemes provide authentication, integrity and non-repudiation to digital communications.
Some extensions or variations of the concept of digital signature have been introduced, and many specific realizations of these new types of nature schemes have been proposed.
In this thesis, we deal with the basic definitions and required security properties of traditional signature schemes and two of its extensions: distributed signature schemes and ring signature schemes. We review the state of the art in these two topics; then we propose and analyze new specific schemes for different scenarios.

Namely, we first study distributed signature schemes for general access structures, based on RSA; then we show that such schemes can be used to construct other cryptographic protocols: distributed key distribution schemes and metering schemes. With respect to ring signatures, we opose schemes for both a scenario where the keys are of the Discrete Logarithm type and a scenario where the public keys of users are inferred from their personal identities. Finally, we also propose some distributed ring signature schemes, a kind of schemes which combine the concepts of distributed signatures and ring signatures.

We formally prove the security of all these proposals, assuming that some mathematical problems are hard to solve. Specifically, we base the security of our schemes in the hardness of either the RSA problem, or the Discrete Logarithm problem, or the Computational Diffie-Hellman problem.
Some contributions from graph theory to the design and study of large and fault-tolerant interconnection networks
Authors:   , Pelayo Melero Ignacio Manuel
Published: October 2023

Esta tesis trata diversas cuestiones relacionadas con el diseño y estudio de redes de interconexión densas y fiables. Concretamente en ella se han incluido cuatro grupos de contribuciones. En primer lugar se presenta una nueva lista de grafos densos de diámetro seis. Cada uno de estos grafos se ha diseñado mediante un tipo particular de composición a partir de los
grafos biapartitos de Moore de diamétro seis con una familia de grafos completos. Se presentan nuevos grafos obtenidos hasta grado máximo 14, aunque el método utilizado permite teóricamente producir grafos densos de diámetro seis y grado máximo una potencia de un número primo menos uno. A continuación, se lleva a cabo una reformulación de los grafos compuestos
generalizados a partir de la cual se aborda el problema de su 1-vértice vulnerabilidad del diamétro, obteniéndose que, en general, esta es quasi-óptima.

En tercer lugar, se lleva a cabo un análisis sobre conectividad y superconectavididad bajo condiciones sobre el diámetro y sobre el orden de la familia de p-ciclos generalizados, utilizando la terminología de Hamidoune. Finalmente, exponen una serie de resultados sobre conectividad, superconectividad y extraconectividad bajo condiciones sobre el diámetro, a partir de la introducción de un único método de demostración constructiva denominado algoritmo de retirada progresiva y de una nueva familia de parámetros definida partiendo de la del parámetro 1 de Fiol y Fábrega.
Las estaciones que fundaron el metro en Santiago de Chile
Authors:   , Hidalgo Cepeda Nancy Rocio
Published: October 2023

El metro de Santiago y sus estaciones se construyen en la década de los ‘70 como protagonistas de un proyecto mayor de modernización de la ciudad, liderado por el arquitecto y urbanista Juan Parrochia Beguin.
La tesis aborda la génesis y la expresión espacial de las estaciones de metro de este período, destacando su vital participación en la configuración del espacio público de la ciudad. Se presentan como piezas fundamentales de un nuevo “sistema urbano”, que desde su arquitectura y emplazamiento, confrontan tanto las exigencias tecnológicas del transporte público, como los requerimientos y oportunidades de cada uno de los lugares en que se insertan.
A partir de levantamientos y registros fotográficos, y del análisis y representación de los planos de trazado y arquitectura de cada estación y de su entorno, se reconstruye la historia de relevantes proyectos urbanos en torno al metro, yendo más allá de las propias estaciones, para reflejar la nueva dimensión metropolitana que adquiere la ciudad total

The Metro of Santiago and its stations were built in the decade of the ‘70s and acted as protagonists of a larger project of modernization of the city, led by the architect and urban planner Juan Parrochia Beguin.
This thesis addresses the origins and spatial expression of the metro stations of this period, emphasizing their vital role in shaping the public space of the city. These stations are analyzed as cornerstones of a new “urban system” that through their architecture and location confront both the technological demands of public transport and the requirements and opportunities of each of the places into which they are inserted.

Starting with surveys of the built form and photographic records, followed by an analysis and drawn representation of the layout and architecture of each station and its surroundings, the history of significant urban projects located around the subway system is reconstructed. The research goes beyond the stations themselves in order to also reflect on the new metropolitan dimension acquired along the main avenues of the city during this period of urban transformation.
Experimenal study of the aerodynamics of a horizontal axis wind turbine
Authors:   , Campo Gatell Vanessa del
Published: October 2023

One of the challenges of the wind energy community today is to improve the existing background on the aerodynamic phenomena of a Horizontal Axis Wind Turbine (HAWT), the prediction of the wind speed distribution on the rotor plane, and the estimation of the design loads. This dissertation aims at contributing to the fulfillment of these objectives.

In this way, this study assessed the feasibility of measuring the loads exerted on a HAWT blade by means of Stereoscopic Particle Image Velocimetry (SPIV), which is a non intrusive technique that provides with the whole 3D velocity field in a plane. Thus, with this PIV-Loads method, the velocity and pressure fields, as well as the resultant aerodynamic forces around a section of the blade, would be available simultaneously, without the need of modifying the model or disturbing the flow.

In order to achieve this goal progressively, the PIV-Loads method, based in a Momentum Equation contour-based approach, was firstly validated using DNS data, both for a laminar unsteady flow case, as for a velocity averaged turbulent flow. Secondly, the method was tested in the wind tunnel with a bidimensional problem, measuring forces in a stationary flat plate, for different angles of attack (with laminar and turbulent flow conditions). The force estimation results were compared with those provided by a high sensitive balance. Finally, the PIV-Loads method was applied to a HAWT model working both in axial and yaw flow conditions, measuring forces on a rotating blade for steady and unsteady cases. Final load calculations were compared with those resulting from a numerical simulation based in the Panel method approach. Bringing the project to completion, the near vortex wake of a HAWT was characterized by means of Time Resolved PIV.

Regarding the PIV-Loads methodology, load predictions are more reliable if the integration path does not cross a shear layer or a boundary layer. In addition, it is neither recommended to neglect the third velocity component when measuring forces on a rotating HAWT blade, nor to eliminate the velocity fluctuation terms when dealing with turbulent flows.

All implemented codes and experimental results were validated or compared with numerical or experimental alternative data showing good consistency. The conclusion is that the PIV-Loads method provides with precise results if the available velocity data is sufficiently accurate. However, any PIV errors such as lack of resolution, velocity gradients inside the interrogation window or laser reflections, may lead to uncertainties in the load measurements. Any future improvement in this sense will certainly lead to better results.
Lucio Costa : o processo de uma modernidade. Arquitetura e projetos na primeira metade do século XX.
Authors:   , Brito Samuel Silva de
Published: October 2023

This project deals with the architectural works of Lucio Costa (1902-1998) and his projects built during the decades of the 1920's, 1930's, and 1940's. lnside a historiographical narrativa, we have structured an architectural series through a process of perspectiva by reading about Lucio's mature modernism starting with an analytic montage that describes his first eclectic works.
Without rigorous cataloging and the illustration of various photographs, sketches, and original drawings, our analysis sought to verify the transformation process of architectural criteria consolidated along his almost 30 year practice. Fixture identification, overlap, and elimination of paradigms that arase since his first eclectic works deepened into a national romanticism and neocolonialism which followed after his abrupt conversion to modern vanguard, where he longed to search far maturity through an adaptation of specific characteristics by the traditional means of the Luso-Brazilian.

Este trabajo analiza la obra arquitectónica de Lucio Costa (1902-1998), proyectos y obras construidas durante las décadas de 1920, 1930 y 1940. A través de una narrativa historiográfica estructuramos su conjunto arquitectónico desde una perspectiva de proceso, realizando la lectura de su modernidad madura con un montaje analítico, el cual se inicia en sus primeras obras eclécticas.
Sin un rigor de catalogación, y con la ilustración de diversas fotos, croquis y dibujos originales, nuestro análisis buscó verificar el proceso de transformación de los criterios arquitectónicos consolidados a lo largo de casi treinta años. Identificando la fijación, superposición y eliminación de
los paradigmas que se manifestaron desde su obra ecléctica inicial, que luego se profundizó en un romanticismo nacional, el neocolonial, y que siguieron después de su brusca conversión a la vanguardia moderna, en donde no tardó en buscar madurez a través de la adaptación de
características específicas del ambiente y de la tradición luso-brasileña.

Este trabalho trata da obra arquitetônica de Lucio Costa (1902-1998), projetos e obras construídas durante as décadas de 1920, 1930 e 1940. Dentro de uma narrativa historiográfica estruturamos seu conjunto arquitetônico desde uma perspectiva de processo, fazendo a leitura de sua modernidade madura a partir de uma montagem analítica que se inicia em suas primeiras obras ecléticas.
Sem um rigor catalográfico, e com a ilustração de diversas fotos, croquis e desenhos originais, nossa análise buscou verificar o processo de transformação dos critérios arquitetônicos consolidados ao longo desta práxis de quase 30 anos. Identificando a fixação, sobreposição e eliminação dos paradigmas que se manifestaram desde sua inicial obra eclética, que pronto se aprofundou em um romantismo nacional, o neocolonial, e que seguiram após sua brusca conversão à vanguarda moderna, onde não tardou em procurar maturidade através da adaptação de características específicas do meio e da tradição luso-brasileira.
Evolución y características tipológicas de la vivienda en Manabí, Ecuador
Authors:   , Camino Solórzano Alejandro Miguel
Published: October 2023

Manabí es la tercera provincia del país, por el número de población y la cantidad de rentas que aporta, sólo superada por Pichincha y Guayas. (...) En materia de arquitectura viviendística ha desarrollado muestras de reconocido valor, desde el precolombino, colonial, republicano, hasta llegar a las muestras modernas más recientes, persistiendo también lo vernacular campesino. Una práctica habitacional que no se ha fundamentado en una teoría y peor en un análisis crítico, sino que históricamente ha ido transmitiendo un conocimiento empírico, en una permanente continuidad de la tradición y el buen oficio. Al perderse este proceso de continuidad por el ímpetu de una modernidad que no incorpora la tradición, se hace imprescindible recoger mediante esta Tesis, los valores y la evolución de la vivienda en Manabí. La inexistencia de un trabajo de este tipo, convierte al estudio en un material totalmente original, pero al mismo tiempo parte desde cero en la investigación y formulación de la misma (...) Las incertidumbres de la época Contemporánea ante la pérdida de vigencia de los preceptos de la arquitectura moderna, exigen la revalorización de la arquitectura local, para reiniciar la continuidad de las tradiciones con un lenguaje actualizado acorde a las nuevas necesidades y el espíritu de nuestro tiempo y lugar. Uno de los mayores problemas es la falta de bibliografía existente sobre gran parte de nuestra historia precolombina, colonial y parte de la republicana. Se entiende la falta de documentación precolombina, por cuanto los vestigios arqueológicos son escasos y muchos de ellos han perecido por los materiales vegetales utilizados. Los “entierros” (tumbas) no han sido totalmente estudiados, quedando gran cantidad de ellos en espera de poder revelarnos sus secretos. (...)
"Mitad fábrica mitad convento" : la casa Tàpies
Authors:   , Pérez Mañosas Antoni
Published: October 2023

El tema central del treball és la casa que l'arquitecte José Antonio Coderch va projectar per a l'artista Antoni Tàpies i la seva família, en un procés que va durar des de 1960 fins a 1963. Aquesta casa ha estat abastament estudiada com a objecte arquitectònic, i no és la meva intenció continuar exclusivament per aquest camí. S'aborda sovint l'estudi d'una obra arquitectònica (el procés de projectació i la seva materialització) com un objecte de coneixement aïllable en el temps, tot i que se'l situï dins d'un context històric.
Aquí intentaré ampliar l'àmbit d'estudi, en el sentit de considerar la casa com un ser que té una vida pròpia, i no únicament com aquella obra fixada en les fotografies que Català-Roca o Casali van fer amb la casa tot just acabada; en el moment en que les obres d'arquitectura tenen una aparença d'objecte perfecte i nou.
La vida a la casa i la vida de la casa

The central topic of this work is the house that architect José Antonio Coderch designed for the artist Antoni Tapies a nd his tamily, in a process that lasted from 1960 to 1963.
The study of an architectural work (such as a design process and its execution) is often approached as an object of knowledge isolable in time,although placed within a historical context.
Here we want to expand the scope ot the study, in the sense of considering this house with a life of its own, and not only as the published work in the photographs that Catala-Roca or Casali took when the house was brand new; at a time when a rchitectural works have this perfect look.
Life of the house and lite inside the house.
This thesis is organized into the following sections:
1. Prologue with genera l intentions. Design and contents of the thesis.
2. The Tapies house, as how it has been understood by the people who have known it. Ordered in increasing intensity. So: Occasional or regular visitors. Architectura l photographers. Customers. lnhabitants.
Finally, we will consider issues of the project of the house.
3. All contextual facts relating to the house,in one way or another.
Coderch's activities simultaneous with the design and construction of the house. Sorne examples of a rtists' houses and studios in the twentieth century.
Other projects by the architect in urban consolidated areas (terraced houses).
4. lssues and project solutions present in the work of Coderch, in tapies that have sorne connect ion with the project for the Tapies house.
Pick of a language based on a rchitecture of rural villages in a Mediterranean climate, and slow evolution. Functional issues regarding contemporary way of living, privacy and presence of servants.
Architectural solutions. Working method in Coderch workshop.
5. Conclusions, constituted by sorne points:
The continued relevance of the figure and work of Coderch, in a time that pays little attention to ethical, professional and personal values.
The Tapies house and his qualities as a possible architectural model. The Tapies house towards the end ot its lite.
6. Bibliography.
Physical Environment and Food Safety on Loyalty through Customer Satisfaction at Fast Food Restaurant “X” in North Jakarta
Authors: Rodhiah Rodhiah , Aritonang R Lerbin R , Ervina Ervina
Published: October 2023

The market potential for fast food restaurants in Indonesia is large. Fast food restaurant “X” in North Jakarta which is one of the fast food restaurants in Indonesia has four competitors that becomes a challenge. Therefore, this fast food restaurant can build good relationships with customers, so customer loyalty can be achieved. Customer loyalty can be influenced by physical environment and food safety through customer satisfaction. Furthermore, customer loyalty can be influenced by customer satisfaction. Customer satisfaction can be influenced by physical environment and food safety. Thus, this research aims to test the influence of physical environment and food safety on customer satisfaction; test the influence of customer satisfaction on customer loyalty; and examine the role of customer satisfaction in mediating the influence of physical environment and food safety on customer loyalty. The study population is customers from fast food restaurant “X” in North Jakarta. 140 people as the research respondents were examined. The sampling method used is non-probability with purposive sampling technique. The research instruments used are questionnaires via Google Form. The data analysis technique used is SEM using SmartPLS software. The results are physical environment and food safety have positive influence on customer satisfaction, customer satisfaction has positive influence on customer loyalty, and physical environment and food safety have positive influence on customer loyalty through customer satisfaction. Hence, fast food restaurant “X” in North Jakarta must pay attention to the physical environment and food safety because these can increase customer satisfaction and ultimately maintain customer loyalty.
Analisis Budaya Melayu Terhadap Modernisasi Dalam Perspektif Mahasiswa Universitas Islam Negeri Raden Fatah Palembang
Authors: Maryamah Maryamah , Ersyliasari Aulia , Luthfia Ananda Masykuria , Julinda Julinda
Published: October 2023

Budaya melayu sudah tercipta jauh pada zaman pra Sejarah dan di lestarikan hingga sekarang, pada kurun waktu yang Panjang budaya melayu tetap berdiri kuat tanpa terhapus oleh perkembangan zaman khususnya pada zaman modern saat ini. Pada kenyataannya orang melayu telah sadar akan pentingnya sebuah budaya untuk di wariskan ke generasi selanjutnya sehingga budaya melayu tersebut selalu dapat dilestarikan disepanjang zaman. Modernisasi merupakan proses perubahan yang terjadi pada Masyarakat yang dari Masyarakat tradisonal menjadi modern dalam seluruh aspek kehidupannya. Tujuan penelitian ini adalah untuk menganalisis perspektif mahasiswa/I universitas islam negeri raden fatah Palembang dalam memahami budaya melayu yang diiringi dengan perkembangan zaman apalagi di era modernisasi ini. Apakah budaya melayu mengalami perkembangan dan perubahan sesuai zaman atau tidak. Metode yang digunakan dalam penelitian ini adalah metode kualitatif dengan teknik pengumpulan data melalui kuesioner di google from. Hasil dari penelitian ini bahwa dengan perkembangan ilmu pengetahuan dan kemajuan teknologi, nilai-nilai lama yang semula menjadi acuan suatu kelompok masyarakat (melayu) menjadi goyah akibat masuknya nilai-nilai baru dari luar. Akibatnya nilai-nilai lama yang terkandung dalam pranata sosial milik masyarakat menjadi pudar. Dalam perkembangan modernisasi ini, fenomena yang penting berlaku ialah proses pengembangan dalam konteks pengaruh kemodernan yang keterlaluan dengan kepentingan Islam, yang juga terdapat kumpulan yang keterlaluan. Dalam proses perubahan yang kerapkali didapati pengaruh kemodernan, dapat membawa penyelewengan atau bertentangan dengan nilai-nilai Islam.
Synthesis and characterization of the poly(GMA-b-EG) block copolymer containing epoxy-resin by redox polymerization
Authors: GÖKTAŞ Melahat , AYKAÇ Cengiz
Published: October 2023

In this study, poly(glycidyl methacrylate-block-ethylene glycol) [P(GMA-b-EG)] epoxy-based copolymer was synthesized and evaluated by redox polymerization. For this purpose, poly(GMA-b-EG) block copolymer containing epoxy-resin was synthesized by redox polymerization of glycidyl methacrylate using polyethylene glycol (PEG-3000) macroinitiator in the presence of cerium ammonium nitrate [Ce(NH4)2(NO3)6] catalyst. The synthesized epoxy-based copolymer was characterized by FTIR, 1H-NMR, DSC, TGA, and SEM spectroscopic methods. The molecular weight of the epoxy-based copolymer was also determined by GPC. The epoxy-based copolymer has a relatively narrow molecular weight and distribution. The DSC result showed that the glass transition temperature value of the epoxy-based copolymer was 28 oC, different from that of the homopolymer. SEM analysis showed that the surface morphology of PEG and epoxy-based copolymers was different. It has been proven by TGA analysis that the epoxy-based copolymer has two different decomposition temperatures of 160 °C and 400 °C.
PENERAPAN METODE PENGEMBANGAN LAHAN (LAND DEVELOPMENT ANALYSIS) DALAM PENILAIAN TANAH
Authors: Subagyo Petrus Teguh , Nurhidayah
Published: October 2023

Keberadaan lahan kosong di lokasi yang cukup potensial akan memberikan nilai tambah bagi pemiliknya jika dilakukan optimalisasi atas lahan kosong dimaksud. Penentuan nilai tanah kosong seluas 36.640 m2 di lingkungan permukiman  tidak memungkinkan menggunakan pendekatan pasar, sehingga dipilih pendekatan pendapatan dengan metode Land Development Analysis , yang diasumsikan hamparan tanah tersebut dapat dikembangkan menjadi kawasan permukiman sebagai alternatif penggunaan terbaik dan tertinggi. Berdasarkan rencana pengembangan lahan, nilai pasar tanah diperoleh dari arus kas yang berasal dari  pendapatan penjualan unit rumah dikurangi dengan biaya pengembangan atas lahan tersebut Dari hasil analisis diperoleh indikasi nilai pasar tanah sebesar Rp3.500.891,50
Analisis Faktor Penyebab Rendahnya Hasil Belajar Siswa pada Pembelajaran IPA Kelas IV SD Negeri 105358 Sekip Lubuk Pakam
Authors: Amanda  , Darwis Umar
Published: October 2023

Penelitian ini bertujuan untuk mengetahui tentang faktor-faktor yang menyebabkan rendahnya hasil belajar siswa pada pembelajaran IPA kelas IV SD Negeri 105358 Sekip Lubuk Pakam. Penelitian ini untuk memudahkan guru dalam memahami faktor-faktor apa saja yang menjadi penyebab rendahnya hasil belajar siswa di SD Negeri 105358 Sekip Lubuk Pakam. Jenis penelitian ini merupakan penelitian deskripsi kualitatif. Subjek penelitian ini adalah siswa kelas IVB sebanyak 16 siswa yang teridentifikasi memiliki nilai ulangan harian yang rendah. Pengumpulan data dilakukan dengan menggunakan angket, wawancara, dan dokumentasi. Dalam analisis data menurut Miles dan Huberman meliputi: 1) Data Display (Penyajian Data), 2) Data Reduction (Reduksi Data), 3) Verification (Penarikan Kesimpulan). Hasil penelitian menunjukkan bahwa faktor yang menyebabkan hasil belajar rendah pada siswa kelas IVB SD Negeri 105358 Sekip Lubuk Pakam adalah faktor internal (berasal dari diri sendiri) faktor minat, faktor bakat, dan faktor konsentrasi belajar. Berdasarkan hasil angket yang diberikan kepada siswa: 1) Faktor Kesehatan dengan persentase 100% yang tergolong sangat tinggi, 2) Faktor Minat dengan persentase 25% yang tergolong rendah, 3) Faktor Bakat dengan persentase 25% yang tergolong rendah, 4) Faktor Konsentrasi Belajar dengan persentase 29% yang tergolong rendah, 5) Faktor Keluarga dengan persentase 52% yang tergolong tinggi, 6) Faktor Masyarakat dengan persentase 56% yang tergolong tinggi, 7) Faktor Sekolah dengan persentase 44% yang tergolong sedang.
Building Circularity into Nationally Determined Contributions - A Practical Toolbox. User Guide
Authors:   United Nations Environment Programme,   United Nations Development Programme,   Secretariat of the United Nations Framework Convention on Climate Change
Published: October 2023

The toolbox provides guidance and tools for each stage of the policy cycle. Users can jump in at any stage with tools and options to report the interventions, targets, and indicators in the NDC. The tools have been selected according to established criteria including applicability at the national level, being previously tried and tested, and their relevance to the specific objectives of reducing GHG emissions. The tools allow the user to build on existing national data or use data from available tools as needed.
O ineditismo dos dispositivos IoT e sua relação com o paradoxo da privacidade
Authors: Lio Rocha Camargo Júlia
Published: October 2023

Em síntese, o presente artigo tem como objetivo compreender e estudar a configuração do privacy paradox e sua relação com a mais recente tecnologia: a Internet das Coisas. Neste trabalho, será analisado "se" e "de que forma" os dispositivos IoT ampliam o debate decorrente desse fenômeno, bem como quais seriam as medidas possíveis de serem aplicáveis para mitigar essa controvérsia.
Cibersegurança e segurança da informação aplicadas à IoT
Authors: Takashi Hayashi Victor
Published: October 2023

O objetivo deste capítulo é apresentar conceitos de segurança da informação e cibersegurança no contexto de Internet das Coisas (IoT). Após a leitura deste texto, é esperado que o leitor tenha condições de analisar a segurança de sistemas IoT a partir da compreensão das demandas de segurança (requisitos), pontos fracos existentes (vulnerabilidades), motivações dos atacantes, e possíveis estratégias a serem adotadas para elevar o nível de segurança (prevenção e detecção). O artigo também conta com estudos de caso e algumas recomendações sobre como lidar com novos desafios de segurança em IoT.
The use of Laplace transform in the inverse problem from bound states
Authors:   ", MEZHOUD R. ,   D´epartement de Physique, Facult´e des Sciences, Universit´e M’Hamed Bougara de Boumerdes, Avenue de l’Ind´ependance, 35000 Boumerdes, Algeria", AMI I. ,   "D´epartement de Physique, Facult´e des Sciences, Universit´e M’Hamed Bougara de Boumerdes, Avenue de l’Ind´ependance, 35000 Boumerdes, Algeria", LOMBARD R. J. ,   IJClab, Orsay, F-91406 Orsay cedex, France
Published: October 2023

"In a previous work dedicated to non-relativistic quantum mechanics in the three-dimensional space with spherical symmetry, we have shown the possibility of reconstructing the ground state density from its moments in the case of bound states. The method is based on relationships connecting these moments to the lower energy of each state of angular momentum `. The ground state density yields the ground state wave function, which allows us to calculate the equivalent local potential by inverting the Schrodinger equation. This calculus uses the Fourier transform of the ground state density ρ(r). The aim of this work is to check how to improve the results by replacing the Fourier transform by the Laplace transform of the quantity r2 ρ(r). The method is first presented. Then examples and results are compared to those obtained previously. "
Massive black hole growth using the star gulping mechanism
Authors:   ", CARAMETE L. I. ,   Institute of Space Science, 409 Atomiștilor Street, RO-077125, Măgurele, Romania", BALAȘOV R. A. ,   "Institute of Space Science, 409 Atomiștilor Street, RO-077125, Măgurele, Romania", PĂUN A. M. ,   "Institute of Space Science, 409 Atomiștilor Street, RO-077125, Măgurele, Romania"
Published: October 2023

"The evolution of merging black holes (BHs) and their associated processes will be the center-piece study for the upcoming gravitational waves (GWs) observatories, including the LISA Space Mission from ESA. We ran simulations specifically for studying the BH growth, in order to provide estimates regarding the detection rates for the future GW laboratories. Here, we describe the results of our investigations for a new implementation regarding the BH growth, star gulping (SG), in which stars are absorbed by BHs. The current scientific literature emphasizes two main mechanisms for the growth of BHs: accretion of surrounding material and merging with another BH. By taking into account both methods, one can begin to model the growth processes of the most massive BHs (MBHs) from the moment of their origin to current observations. Our previous work showed that even if you consider these processes at their maximum, it is very difficult to grow BHs to the masses and concentrations that we measure today. Therefore, we performed detailed simulations in order to study another growth mechanism, star gulping (SG), that has the potential to add more mass to BHs."
Magnetically active composites with relatively giant dielectric permittivity
Authors:   West University of Timisoara, Bd. V. Parvan, nr.4, 300223 Timisoara, Romania, BUNOIU M. , IACOBESCU G.-E. ,   "University of Craiova, Department of Physics, Alexandru Ioan Cuza Street, Nr. 13, 200585 Craiova, Romania", PASCU G. ,   West University of Timisoara, Bd. V. Parvan, nr.4, 300223 Timisoara, Romania, CHIRIGIU L. ,   University of Medicine and Pharmacy, 200396 Craiova, Romania, BICA I. ,   West University of Timisoara, Bd. V. Parvan, nr.4, 300223 Timisoara, Romania
Published: October 2023

"Magnetically active composites based on silicone rubber, silicone oil, carbonyl microparticles, graphene nanopallets and fabric, as a reinforcing element, are manufactured. For a constant amount of carbonyl iron microparticles and silicone oil, and for different ratios between the amounts of silicone rubber and graphene nanopalets, three composite samples are prepared. Using the plane capacitor method, the relative permittivity of the composites is determined. It is shown that by using graphene nanopallets, composites with giant values of relative dielectric permittivity can be obtained and that the relative dielectric permittivity values are sensitive to the magnetic force induced by the static magnetic field superimposed on the medium-frequency electric field. Using the model of the dipolar magnetic approximation and elements of the theory of dielectrics in medium frequency electric fields, the mechanisms participating in the obtained effects are described."
The study of capillarity phenomena by means of ImageJ software
Authors:   University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Romania, RADU ADRIANA , STOICA DANIELA ,   National College “Ion Luca Caragiale”, 98 Gheorghe Doja Street, Ploiesti, Romania, POPESCU M. V. ,   National College “Ion Luca Caragiale”, 98 Gheorghe Doja Street, Ploiesti, Romania, BERLIC C. ,   University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Romania, MIRON CRISTINA ,   University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Romania, BARNA V. ,   University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Romania
Published: October 2023

"Capillarity phenomena appear due to different molecular forces acting between fluid molecules located at the interface with either another fluid or a solid. The macroscopic description of the phenomenon can be done in terms of surface tension. In this paper, we determined the surface tension coefficient of aqueous solution of potassium permanganate by means of Jurin's law and also made diameter measurements and capillary ascents on images by using ImageJ software. Furthermore, we studied the capillary phenomena between two parallel and non- parallel plates. In the case of non-parallel plates, employing a special plugin of the ImageJ software, we determined the equation of the rectangular hyperbola drawn by the surface of liquid rising between plates. These experiments can be performed at elementary level and, additionally, used as a stimulus to discover more advanced topics."
On the Study of Ruin at Two Sided Risk Renewal Processes
Authors: Rebello Joseph Justin , Mrudhula Mary P.L. , Noushad Shafna
Published: October 2023

Since the introduction of Two sided movements of risk reserves in the renewal risk theory scenario, the concept has been the major area of analysis for many researchers. Under some elementary assumptions, on approximating appropriate distributions to inter time claim occurrence, the explicit expressions for ruin theory components in the literature could be generated. In this work, we examine probability density of the time of ruin, surplus immediately before ruin and deficit at ruin respectively under two sided risk process using some fundamental assumptions. Explicit expressions for distribution of interest are also being derived.
Openness for society or for profit?
Authors: Eve Martin Paul
Published: October 2023

A twitter conversation that I had with Michelle Brook this morning. [View the story "Openness for society or for profit?" on Storify] Openness for society or for profit? was originally published by Martin Paul Eve at Martin Paul Eve on April 19, 2014.
Two free copies of "Pynchon and Philosophy" to win and/or a 25% discount
Authors: Eve Martin Paul
Published: October 2023

OK, so, as I am  sure  you know, this coming Thursday is Pynchon in Public Day, when we celebrate the birthday of one of America's greatest (and most invisible) living novelists by reading his works in public and posting photos.
Discussing/annotating The History Manifesto and the open access effect(?)
Authors: Eve Martin Paul
Published: October 2023

Amid my travels this month I've been keeping an excited and close eye on the progress of Jo Guldi and David Armitage's  The History Manifesto  . This interest is both a matter of content and form.
Designing an open source OA toolchain for books
Authors: Eve Martin Paul
Published: October 2023

The Cluster and the University Library invited Dr. Martin Eve (Lincoln University) for a two day intensive workshop with Dulip Withanage and Dr. Andrea Hacker to develop and design a publication tool for Open Access books.
Above and beyond: “good” and “bad” surpluses in academic publishing
Authors: Eve Martin Paul
Published: October 2023

In a recent post, I came up with a per-article costing figure, based on Ubiquity Press's economy of scale, for a learned society to go open access. I received two responses to the figure given. One said that it was extortionately high. The other queried whether it was perhaps unrealistically low. What are the real costs of scholarly communication? Often it is very hard for us to know.
Open Access, Monographs and "working for publishers for free"
Authors: Eve Martin Paul
Published: October 2023

The other day, I was sent a text message by a senior academic friend who has a healthily sceptical view of the open access work that I do. The question was: "re. Monographs, authors should be paid for their work, the publishing business model now allows for that as would online pay walls (not much but depends on book and who you are). How do you deal with that in mandatory OA, would we all be working for publishers for free?" My responses and
Typesetting JATS bibliographies using CSL and Zotero
Authors: Eve Martin Paul
Published: October 2023

One of the hardest parts of typesetting articles for scholarly publication in the JATS standard, especially when using homemade tools, is the bibliography. JATS (and its NLM predecessors) expects references to be broken down into their constituent components where possible in order to be semantically rich. For example: This is all very well, but it also creates a problem.
Pondering a solution to the problem of Learned Societies and the transition to open access
Authors: Eve Martin Paul
Published: October 2023

One of the biggest problems faced in the transition to a pure open access environment for journals is that learned societies have become dependent upon subscription revenue to subsidise their activities. This is not an a-historical phenomenon but has emerged most prominently since the 1960s when the societies outsourced their journal productions to either commercial publishers or to university presses.
Does Amazon kill a revenue channel for open access monographs?
Authors: Eve Martin Paul
Published: October 2023

It is widely acknowledged (in many funder mandates, for instance) that open access for peer-reviewed academic books in the humanities is a harder proposition. The labour invested in their production is quantitatively higher than for a similar journal article and degrees of cross-subsidy are often levelled across a Press's list in order to support scholarship that might not otherwise be economically viable.
Enabling a triple-head (3 monitor) setup on Linux Mint 16 ("Petra") with two Nvidia cards
Authors: Eve Martin Paul
Published: October 2023

OK, so this was utterly painful and I needed to share what finally worked for me. I have 2 x Nvidia GTX480 cards. I have 3 x monitors. I wanted to be able to run all three off the same box, using it as a single X Screen (i.e. so I can move windows between screens and it acts correctly). No matter what I tried, it wouldn't let me do so with the proprietary driver. I asked on Stack Exchange and got somewhere closer.
Why do some academic publishers think they should charge extra for more liberal licenses (CC BY)?
Authors: Eve Martin Paul
Published: October 2023

In recent days, there has been a surge of opposition from some members of the scientific community over the new journal being launched by the American Association for the Advancement of Science. Aside from the high base-level charge from this publisher, which seems outside of the norm, one of the most controversial elements (also seen with some other publishers) is that the AAAS wants to charge more for a more liberal license.
A consumerist rant: what's wrong with banks
Authors: Eve Martin Paul
Published: October 2023

This is a slight departure from my usual more high-minded posts simply to have a rant about the entities with whom I have the most frustrating interactions in my consumer life: banks. Sure, they crashed the economy. Sure, they're trading on fiction and debt. This isn't about that. It's instead simply about how poorly they treat their customers. I have to interact with banks. I wish I didn't. As it stands, though, they are appalling.
Things academia.edu (@academia) should do (hint: work with green OA)
Authors: Eve Martin Paul
Published: October 2023

academia.edu is a "social network" for academics. Their latest design mirrors Facebook with its blue header and notification schema. When I saw Ben Lund speak about this at SCONUL, he implied that the outfit wants, in some ways, to disintermediate academic publishers.
First Impressions From Paul Thomas Anderson’s film of ‘Inherent Vice‘
Authors: Eve Martin Paul
Published: October 2023

With his fastest turn-around in well over a decade, Paul Thomas Anderson completed production on Inherent Vice last summer, just around a year after initial screenings of The Master began.
What do we mean by the "standing" and "reach" of research?
Authors: Eve Martin Paul
Published: October 2023

This article originally appeared, in a shorter, edited form in the Guardian: Is UK humanities research reaching the widest possible audience? Today marks the launch of another report into the open access ecosystem; a space that is rapidly becoming extremely saturated.
University Presses and Commercial Publishers should start offering green OA for monographs
Authors: Eve Martin Paul
Published: October 2023

Green open access refers to making academic, peer-reviewed research that has been published elsewhere (even subscription/sales venues) available for anyone to read freely on the internet by depositing the work in an institutional or subject repository. A large number of journal publishers allow this. Ideally, this is done without embargo. To protect revenue, however, often a publisher imposes a delay.
Here by the Sea and Sand: A Symposium on Quadrophenia
Authors: Eve Martin Paul
Published: October 2023

Sponsored by the Centre for Modernist Studies, the Centre for Visual Fields, the Centre for Research into Childhood and Youth, University of Sussex, and the Interdisciplinary Network for the study of Subcultures, Popular Music and Social Change Here by the Sea and Sand: A Symposium on Quadrophenia was originally published by Martin Paul Eve at Martin Paul Eve on May 31, 2014.