Material characterization of graphene enhanced Class-H cement under thermal cyclic conditions

Geothermal heat harvesting is the process of extracting heat from the earth’s subsurface where it is trapped below the diverse rock formations to be converted into usable energy. Cementing of the drilled wells requires the use of materials that are stable at high cyclic temperatures as production ranges between 160°C and +300°C. Ordinary Portland Cement a brittle material (OPC) when mixed with additives can provide improvement to the mechanical stability and enhance fracture resistance at these conditions. One such additive that has gained interest in other fields and applications, but not much explored in cementing field due to its unreactive and hydrophobic nature, is graphene nanoplatelets (GNPs). This study focuses on mixing GNPs with Class-H cement in very low concentrations of 0.1% or less by weight of cement (bwoc) and evaluating the performance and effectiveness in fracture prevention when undergone thermal cycling between 20 °C and 110 °C, 95% relative humidity when hydrated for 7 and 28 days in pH 13 Ca(OH)₂ solution. GNPs in the form of powder (PG) prepared from the environmental waste and a 99.5% carbon purity lab grade liquid dispersion GNPs (LG) were used. 0% GNPs (neat) control, 0.008%, 0.1% of PG and LG mix design cement samples were prepared following API 10B specifications. Results show that 0.1%LG samples hydrated for 28 days had greater dispersion of GNPs with a notable increase in the ductile behavior out of all the designs tested. There is a 13.21% decrease in permeability, 27.77% decrease in hardness and 50.71% decrease in elasticity when compared to neat sample hydrated for 28 days thus proving its effectiveness for wellbore integrity with increase in hydration time

Conceptualizing inter-organizational triads

Interest in triads and triadic research settings for the study of inter-organizational issues is growing. A literature review of inter-organizational studies, claiming a use of triadic research design, shows that the terms “triad” and “triadic” have been used to describe many different types of inter-organizational phenomena. However, not all studies involving a context of three actors are actually examining triads. This paper offers a robust definition of three-actor constellations qualifying as triads. Moreover, it elaborates on different types of inter-organizational triads, based on two aspects of collectivity; cohesion and the ability to act as a single entity. The definition of inter-organizational triads and the categorization of different types of triads will hopefully encourage further studies of triads; the smallest and simplest network which offers insights, which cannot be achieved in the study of single actors or dyads.© 2016 Elsevier. This manuscript version is made available under the Creative Commons Attribution–NonCommercial–NoDerivatives 4.0 International (CC BY–NC–ND 4.0) license, https://creativecommons.org/licenses/by-nc-nd/4.0/fi=vertaisarvioitu|en=peerReviewed

La dramatización en el desarrollo del lenguaje en estudiantes de sexto ciclo de la Institución Educativa Víctor E. Vivar, Llata, Huamalíes, 2019

La investigación de la dramatización y el desarrollo del lenguaje de los estudiantes de la Institución educativa Víctor E. Vivar Llata – Huamalies, obtuvo como objetivo establecer la relación entre la dramatización y el desarrollo del lenguaje en los estudiantes de sexto ciclo de la Institución educativa Víctor E. Vivar Llata - Huamalies”. La investigación fue tipo experimental que se trabajó con una población de 101 estudiantes y una muestra con 27 estudiantes de 13 y 14 años. Los datos estuvieron acopiados mediante la práctica de información sistemática, a través de lista de cotejo. Los resultados logrados manifiestan un progreso significativo en la locución del lenguaje con los estudiantes de edades 13 y 14 estos resultados corroboran, la hipótesis tanteada, la dramatización mejora significativamente el progreso del lenguaje en los estudiantes de sexto ciclo de la Institución Educativa Víctor E. Vivar

PENGARUH PERTUMBUHAN PENJUALAN, PERTUMBUHAN LABA DAN LIKUIDITAS TERHADAP NILAI PERUSAHAAN KOSMETIK DAN KEBUTUHAN RUMAH TANGGA YANG TERDAFTAR DI BURSA EFEK INDONESIA

Tujuan dari penelitian ini untuk mengetahui pengaruh pertumbuhan penjualan, pertumbuhan laba dan likuiditas terhadap nilai perusahaan pada perusahaan kosmetik dan kebutuhan rumah tangga yang telah terdaftar di bursa efek Indonesia pada periode 2016-2021. Pertumbuhan penjualan diukur menggunakan Net Sales Grow Ratio, pertumbuhan laba diukur menggunakan Net Profit Grow Ratio, likuiditas diukur menggunakan Current Ratio dan nilai perusahaan diukur menggunakan Price to Book Value. Populasi yang digunakan pada penelitian ini perusahaan kosmetik dan kebutuhan rumah tangga dengan jumlah 7 perusahaan. Dalam penelitian ini menggunakan data kuantitatif yang diperoleh dari laporan keuangan. Sampel yang digunakan diperoleh dengan menggunakan sampel jenuh. Berdasarkan dari metode sampel jenuh didapatkan 3 perusahaan kosmetik dan kebutuhan rumah tangga yang terdaftar di bursa efek Indonesia pada tahun 2016-2021. Metode analisis yang digunakan analisis statistik deskriptif dan analisis inferensial dengan menggunakan analisis regresi berganda. Hasil dari penelitian statistik deskriptif menunjukan pertumbuhan penjualan, pertumbuhan laba dan likiditas mendapatkan nilai rata-rata yang rendah. Hasil uji asumsi klasik menunjukan semua variabel memenuhi asumsi, juga hasil dari uji kelayakan model menunjukan model regresi layak untuk digunakan. Hasil uji hipotesis memunjukan pertumbuhan penjualan berpengaruh negatif tidak signifikan, pertumbuhan laba berpengaruh positif tidak signifikan terhadap nilai perusahaan sedangkan likuiditas berpengaruh negatif signifikan terhadap nilai perusahaan

Ending-competence in business closure

Business closure and ending-competence are highly relevant concepts in a globalizing world economy where structural change is common. However, ending-competence in business closure situations is a rarely studied phenomenon, and prior theoretical development is modest. In this paper a conceptual model of ending-competence in business closure is developed. A case study examination of a business closure, involving a car manufacturing plant owned by Mitsubishi Motors Australia Ltd., allows further development of the model. The model consists of four elements: (1) earlier experiences of ending; (2) an understanding of different types of commitment; (3) the interdependence between parties; and (4) coordinating and timing the ending. The model illustrates the different roles played by upper and operational management during a closure process. An understanding of ending-competence is important to managers of large firms and to educators of future managers. © 2011.Virpi Havila and Christopher J. Medli

Conceptually Confused, but on a Field Level? A Method for Conceptual Analysis and its Application

This paper develops and applies a Conceptual Analysis Method (CAM). The CAM is a critical reflection on multiple definitions and descriptions of concepts and terms all used to refer to a phenomenon or the experiences of it. The method particularly helps researchers working in emerging research fields to discover any conceptual confusion and elucidate multiple terms and concepts. We demonstrate the utility of the CAM by discovering conceptual confusion on an example field: business relationship uncoupling, and elucidating its terms and concepts. This paper adds to the discussion on the importance of conscious conceptual language for theory development, on the level of a research field. </p

Strewn Effective Hiding In Shared Wireless Networks

This paper introduces cooperative caching techniques for reducing electronic content provisioning cost in Social Wireless Networks (SWNET).SWNETs are formed by mobile devices, such as modern cell phones etc. sharing common takings in electronic content, and actually meeting together in public places. Electronic object caching in such SWNETs are shown to be able to reduce the content provisioning cost which depends heavily on the service and pricing dependences among various stakeholders including content providers (CP), network service providers, and End Consumers (EC).This paper develops practical network, service, and pricing models which are then used for creating two object caching strategies for reducing content provisioning costs in networks with homogenous and heterogeneous object demands. The paper develops analytical and simulation designs for analysing the proposed caching strategies in the presence of selfish users that deviate from network-wide costoptimal policies. It also reports results from an Android phone based prototype SWNET, validating the presented analytical and simulation results

Diseño de mortero y concreto 210 kg/cm2 y 280 kg/cm2 del río Paranapura y Marañón

El presente trabajo de tesis se ha desarrollado en los ambientes del Laboratorio de Mecánica de Suelos de la Escuela Profesional de Ingeniería Civil de la Facultad de Ingeniería Civil y Arquitectura de la Universidad Nacional de San Martin-Tarapoto, con fines de titulación como ingenieros civiles, teniendo como punto de trabajo el laboratorio de ensayo de materiales para el estudio del agregado grueso y agregado fino de las canteras del río Marañón y Paranapura respectivamente, y su correspondiente aplicación y obtención del diseño de mortero resistente y concreto, 210 kg/cm2 y 280 kg/cm2. La investigación a realizarse referente al diseño de mortero resistente y concreto, 210Kg/ cm2 y 280 Kg/cm2 se basa a la combinación de agregados de dos ríos diferentes, lo que se trata de mejorar para alcanzar una óptima calidad, pero también podemos apreciar que los cambios producidos durante los estudios de laboratorio exigen realizar algunos ajustes para lograr el objetivo planteado teniendo en consideración nuevas formas y métodos de desarrollo que ayudan a ir puliendo detalles para alcanzar el objetivo final. La Metodología de estudio desarrollado en este estudio de Investigación para estudiar, analizar y diseñar mortero resistente y concreto, 210Kg/ cm2 y 280 Kg/cm2, utilizado el agregado grueso del rio Marañón y el agregado fino del rio Paranapura fue la de aplicar las normas técnicas y métodos específicos para la obtención de diseños de mezclas Finalmente se muestra los resultados del estudio en la que se analiza y evalúa los datos obtenidos en los ensayos de Laboratorio para la obtención del diseño de mortero resistente y concreto, 210Kg/ cm2 y 280 Kg/cm2 utilizado el agregado grueso del rio Marañón y el agregado fino del rio Paranapura para concluir con su respectivo informe final lo cual aportara al estudio e investigación de posteriores trabajos de Investigación de nuestra Universidad.This thesis work has been developed in the environments of the Soil Mechanics Laboratory of the Professional School of Civil Engineering of the Faculty of Civil Engineering and Architecture of the National University of San Martin-Tarapoto, for the purpose of qualification as civil engineers, having as a working point the materials testing laboratory for the study of the coarse aggregate and fine aggregate of the quarries of the Marañón and Paranapura river respectively, and their corresponding application and obtaining of the design of resistant and concrete mortar, 210 kg / cm2 and 280 kg / cm2 The research to be carried out regarding the design of resistant and concrete mortar, 210Kg / cm2 and 280 Kg / cm2 is based on the combination of aggregates from two different rivers, which is about improving to achieve optimum quality, but we can also appreciate that The changes produced during laboratory studies require some adjustments to achieve the objective set, taking into account new forms and methods of development that help polish details to achieve the final objective. The study methodology developed in this Research study to study, analyze and design resistant and concrete mortar, 210Kg / cm2 and 280 Kg / cm2, using the thick aggregate of the Marañón river and the fine aggregate of the Paranapura river was to apply the standards specific techniques and methods for obtaining mix designs Finally, the results of the study in which the data obtained in the laboratory tests for obtaining the resistant and concrete mortar design, 210Kg / cm2 and 280 Kg / cm2 used, the thick aggregate of the Marañón river and the Fine aggregate of the Paranapura river to conclude with its respective final report which will contribute to the study and research of subsequent research works of our University.TesisAp

Satuan Pendidikan Aman Bencana (SPAB) and Psychological First Aid (PFA) Workshop' for Volunteers in Forum Pengurangan Risiko Bencana (FPRB) Kabupaten Bandung

Strengthening the capacity of schools at the Kabupaten Bandung level in the government-initiated initiative of socializing Satuan Pendidikan Aman Bencana (SPAB) is one of the responsibilities of volunteers from the Forum Pengurangan Risiko Bencana (FPRB). However, there is currently a lack of qualified volunteers to serve as facilitators for disaster preparedness training for school personnel, including teachers and students. The objective of this workshop activity is to provide knowledge and skills to volunteers from the Bandung Regency Disaster Risk Reduction Forum (FPRB) to enhance their role as disaster volunteers. These FPRB volunteers operate under the guidance and supervision of the Bandung Regency Regent. They actively participate in various disaster-related activities such as disaster response, post-disaster rehabilitation and reconstruction, and disaster mitigation. The Bandung District consists of 31 sub-districts, most of which are prone to disasters. Workshop modules have been developed to facilitate the training of Forum Pengurangan Risiko Bencana (FPRB) volunteers. Subsequently, the FPRB volunteers, who will serve as facilitators, will conduct SPAB and PFA (Psychological First Aid) sessions. The training was completed within a two-day period. Keywords: volunteers, disaster education, schoo