bluuebunny/crossref_metadata_2025 huggingface dataset:
Bottom-Up Lastprognose im industriellen Kontext/Bottom-up load forecasting in the industrial context
Authors: Baur Lukas , Kaymakci Can , Sauer Alexander
Published: February 2023

In Zeiten volatiler und steigender Energiepreise gewinnt die Lastprognose als Entscheidungsgrundlage zunehmend an Bedeutung. Die fortschreitende Digitalisierung erlaubt zudem ein detailliertes Aufzeichnen von Verbrauchsdaten auf mehreren Abstraktionsebenen. In diesem Beitrag werden zwei Ansätze, die eine Messzählertopologie in die Prognose integrieren, mit dem Standardansatz auf Hauptzählerebene verglichen. Die Ergebnisse auf den Unternehmensdaten motivieren für einen flächendeckenden Einsatz.

 

Increasingly volatile and rising energy prices make load forecasting increasingly important as a basis for decision-making. Moreover, the advancing digitalization allows a detailed recording of consumption data on several abstraction levels. This paper compares two approaches that integrate a metering topology into load forecasting with the standard approach at the main meter level. The results on enterprise data motivate widespread deployment.
Wasserdampf heizt Werkshallen
Authors: Wintgens Christian , Kilpper Renate
Published: February 2023

Wellpappe ist ein umweltfreundliches Verpackungsmaterial, denn es besteht aus natürlichen Grundstoffen. Für die Herstellung wird Pappe mit 180 Grad heißem Dampf in Form gebracht und verklebt. Ein Teil dieses Dampfes kondensiert beim Wellpappenproduzenten Kunert in Biebesheim in einer neuartigen Dampf-Wärmeübergabestation. Das auf diese Weise entstandene heiße Wasser wird zu Heizzwecken verwendet oder zur erneuten Dampfproduktion zurückgeführt.
Investigation of cationic ring-opening polymerization of 2-oxazolines in the “green” solvent dihydrolevoglucosenone
Authors: Borova Solomiia , Luxenhofer Robert
Published: February 2023

For about the last ten years, poly(2-oxazoline)s have attracted significant attention as potential material for biomedical applications in, e.g., drug delivery systems, tissue engineering and more. Commonly, the synthesis of poly(2-oxazoline)s involves problematic organic solvents that are not ideal from a safety and sustainability point of view. In this study, we investigated the cationic ring-opening polymerization of 2-ethyl-2-oxazoline and 2-butyl-2-oxazoline using a variety of initiators in the recently commercialized "green" solvent dihydrolevoglucosenone (DLG). Detailed 1H NMR spectroscopic analysis was performed to understand the influence of the temperature and concentration on the polymerization process. Size exclusion chromatography and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry were performed to determine the molar mass of the resulting polymers. Our work shows clearly that the solvent is not inert under the conditions typically used for the cationic ring-opening polymerization, as evidenced by side products and limited control over the polymerization. However, we could establish that the use of the 2-ethyl-3-methyl-2-oxazolinium triflate salt as an initiator at 60 °C results in polymers with a relatively narrow molar mass distribution and a reasonable control over the polymerization process. Further work will be necessary to establish whether a living polymerization can be achieved by additional adjustments.
MODELING THE EARLYWOOD AND LATEWOOD GROWTH RINGS OF NORWAY SPRUCE TIMBER BEAMS FOR FINITE ELEMENT CALCULATION
Authors: KIRÁLY TAMÁS , KARÁCSONYI ZSOLT , POLGÁR RUDOLF
Published: February 2023

The purpose of this research is to determine the orthotropic material properties oftheNorway spruce (Picea abies) and to develop a finite element modeling technique that, when applied to an individual specimen, can properly predict the outcome of the measurement results (i.e., deflection by a predefined loading) by simulation only. For the development ofthefinite element model of timber beams, their unique annual ring pattern is considered. TheHSV color spectrum of picture of the end grain pattern is analyzed with a photo analytical algorithm in order to separate the phases, earlywood and latewood. The determined surface ratio of thephases is used to hypothesize that the volume and surface ratios are equal. For thedescription of wood as a material the rule of mixtures is used. The results of thecompared measurements and FE models based on the introduced hypotheses show good agreement within the linear elastic limit.
THE RESISTANCE OF PINUS SYLVESTRIS L. WOOD MODYFIED WITH FURFURYL ALCOHOL FOR DESTRUCTION BY RETICULITERMES LUCIFUGUS VAR. SANTONENSIS (DE FEYTEAUD)
Authors: KRAJEWSKI ADAM , WITOMSKI PIOTR , DYMICKA ALEKSANDRA
Published: February 2023

The aim of the research was to determine the changes in susceptibility of Scots pine (Pinus sylvestrisL.) wood to feeding bysubterranean termites Reticulitermes lucifugus var. santonensisconducted in accordance with the ASTM D 3345-08: 2009 Thesapwood after modification in furfuryl alcohol at concentration 50% with the addition citricacidat concentration 1%, naturalsapwood and heartwood experiment as a compulsory reference material were used for the tests.The blocks of Scots pine wood were used to create seasoned samples of 7% ± 1% moisture content.The blocks with dimensions of 25.4 x 25.4 x 6.4 mm were made from three trees. Each variant was represented by 5 blocks. All wood blocks were freeze-dried before starting the experiment in order to measure the dry weight. After 4 weeks of termite feeding visually rates of wooddestructionwere: 9 (light attack) for modified sapwood, 2.8 (heavy attack/failure)for natural sapwood and 8.2 (light attack/moderate attack)for natural heartwood.The loss of wood weight of blocks was: 0.01 gfor modified sapwood, 0.071 g for natural sapwood and 0.21 g for natural heartwood. The mortality of the termites in the case of modified sapwood was complete. The termite mortality in natural sapwood has been classified as slight, and in natural heartwood as slight to complete.
Uso de nuevas tecnologías en Radiología e imágenes diagnósticas y su relación con las competencias profesionales y/o perfil de egreso del Licenciado en Radiología de Panamá y Latinoamérica en los últimos 15 años
Authors: Rodriguez Amarilys , Martínez Lizeika , Reyes Alvarado Sebastián
Published: February 2023

La radiología es una de las disciplinas médicas con más avances tecnológicos y científicos desde su creación; no obstante, su mayor evolución surgió a partir de la llegada de la era digital, en dónde, se desarrollan métodos de gran importancia para la radiología moderna. Por tal razón, la presente investigación analizó el uso de nuevas tecnologías en radiología e imágenes diagnósticas y su relación con las competencias profesionales y/o perfil de egreso del licenciado en radiología e imagen diagnóstica de Panamá y Latinoamérica en los últimos 15 años. La investigación fue de tipo descriptiva, con un enfoque cualitativo, basado en un diseño documental. La recopilación de la información se obtuvo de diversas bases de datos científicas, identificándose finalmente un total de 25 artículos que abordan las variables de estudio. Los resultados arrojaron que la radiología en los últimos años ha incorporado tecnologías móviles al diagnóstico, perfusión de tejido tumoral y vascular, equipo híbrido TEP/TC, entre otros. Se evidencia, además, deficiencias en las competencias de este profesional en diversos países latinoamericanos, ya que se presentan dificultades operativas, así como la falta de protocolos de seguridad para los profesionales y los pacientes; además, deficiencias en el desarrollo de las habilidades blandas.
Análisis del comportamiento económico de la exportación del sector floricultor en el Ecuador, periodo 2017 – 2021
Authors: Ramos Rodríguez Jacobo Joffre , Garzón Montealegre Víctor Javier , Carvajal Romero Héctor , Quezada Campoverde Jessica , Prado Carpio Ing. Eveligh
Published: February 2023

Las exportaciones suponen una de las actividades en que se sustenta la economía de los países, generando divisas, fuentes de empleo, desarrollo tecnológico, crecimiento competitivo, inversión extranjera. Uno de los sectores importantes del comercio exterior ecuatoriano es el florícola que se ha posicionado como el tercer país de mayor exportación de este producto a nivel mundial por debajo de Países Bajos y Colombia. el objetivo del trabajo es realizar un análisis del comportamiento económico del sector florícola en el periodo 2017 al 2021, para tener una mejor idea sobre su contribución a la economía local. En el trabajo se utilizó la investigación descriptiva con enfoque cuantitativo, teniendo acceso a artículos científicos, información estadística, para su respectivo análisis. Para el año 2021 este importante sector representó el 5.1% de las exportaciones no petroleras además del 0,87% del producto interno bruto corriente. En el año 2020, producto de la pandemia del Covid 19 cayó 6% en las ventas perjudicando a los productores e inversionista. Sin embargo, para el año 2021, las ventas se incrementaron en 100 millones de dólares, vislumbrando un mejor panorama productivo y competitivo de tan importante sector agrícola.
“A STUDY ON BRAND PREFERENCE AND CUSTOMER SATISFACTION OF SELECTED DURABLES AMONG POST GRADUATE STUDENTS STUDYING IN THE MAHARAJA SAYAJIRAO UNIVERSITY OF BARODA”
Authors: Bhatia Deepa Keshav , Naik Kalpesh D.
Published: February 2023

Consumer electronics like laptops and mobile phones have become essential goods today. Since 2020, due to prevalent of corona pandemic students are pursuing education through online mode and are also giving exams in online so this has led to the increase in demand for these products. This study focuses on understanding buying behaviour for two wheelers, laptops and mobile phone among students studying in The Maharaja Sayajirao University of Baroda in Vadodara city. Buying behaviour includes brand preference, factors influencing purchase of selected durables and also it measures satisfaction level. A survey was conducted among students of this University and primary data was collected from 100 post graduate students out of which 50 students belong to commerce faculty and remaining 50 students were from science faculties. Chi square test, Anova and friedman’s test were used to test the hypothesis. Brand name, technical features, instalment were considered as most important factors and advertisements, exchange offer, discount & cash back schemes were least considered by respondents during purchase of selected durables. The results of hypothesis reveal that, all respondents do not show same preference regarding factors influencing purchase of durables. No significant differences were found between their satisfaction level and durable brand which they possess.
INTO CLASSROOM: TEACHERS AS REFLECTIVE PRACTITIONERS
Authors: Negi Bhavna , Tuli Mila
Published: February 2023

This is an interactive paper which deliberates the changes brought about in a community-based children's programme through the teachers. The teachers adopted action-based research to identify and solve their pedagogic concerns. It was through reflective teaching and learning praxis that oriented the (para)teachers to classify, identify and strategize their major classroom problems and solve them. The paper attempts to describe these strategies and processes of teaching-learning that are reviewed and modified by the teachers. These enabled teachers to become empowered ‘practitioners’ within their social context. The paper examines “sustainability” in terms of the transformation in the status of the teachers within their own classrooms. It also examines how empowering teacher; who has a grassroots position in the community programme could bring up and promote sustainable development for the entire educational programme. The paper presented is a culmination of field-based research study tittled Elementary Education Teachers Research Network (EETRN) undertaken at a nodal agency by the authors. The study presented the ethnographic accounts of classroom interactions. This paper intends to unfold and navigate through the intricacies of how the teachers engaged in the process of reflective teaching and research
UNTIL IT BITES YOU, THE SNAKE DOESN’T EXIST: AN ANALYSIS INTO RISK -PRONE AND PREVENTIVE BEHAVIOUR DURING COVID -19
Authors: Shukla Ashutosh , Shah Gaurav
Published: February 2023

This paper is an empirical study that tries to analyse various factors that have been shaping the perception of the pandemic-Covid 19. Unlike a routine phenomenon, the disease is novel and therefore, calls for a study into the variables shaping it. The study will try to find out how individual and public behaviour differ towards the pandemic. With a situation at place calling for following stringent preventive norms and behaviour are there any consistencies in public and individual behaviour? How media reporting is impacting an individual to develop some kind of notion towards the disease?
The paper opted for a cross-sectional study by developing and administering a survey instrument to 149 individuals living in urban locations from four-states in India where maximum number of cases are reported. The theoretical basis for the research lies in attribution theory of perception and cognitive dissonance theory. The observations fall in line with the attribution theory in explaining the pandemic-perception. More importantly, it attempts to explain deviation from recommended behaviour though cognitive dissonance theory. The research value is in describing the underlying factors shaping the pandemic perception so as to sensitise people and institutions of dangers of running biasness amid pandemic times.
PANDEMIC OR NON-PANDEMIC GRAMMAR TRANSLATION METHOD AND ITS USEFULNESS IN CHILDHOOD EDUCATION
Authors: R Vijayalakshmi , J Rebecca
Published: February 2023

One of the best methods that is usually used by teachers to teach foreign languages is through Grammar Translation Method. It is very essential for teachers to use it in the early childhood education because the procedure that’s involved in learning a new language is very pivotal for the learners to acquire skill in the desirable outcome and proficiency in the target language. As we know that India is a multi-lingual land where it becomes an essential task for the teacher to use this grammar translation method to teach in the initial stages of language learning. Early childhood education begins when the child reaches the age of two, it is the phase where the foundation of learning is laid. The actual purpose of this research paper is to put emphasis on the importance of grammar translation method during the early stages of a child’s education in learning foreign languages other than their mother tongue. This is the stage where both parents at home and teachers at school have to pay ample attention towards the children. They have to be able to impart the knowledge based on extra-curricular activities through which a conducive atmosphere would be created for children to enthusiastically participate in learning and acquisition of education. As a tool, a survey is conducted among learners as to how effective was this method for them in their early childhood education.
STUDY THE MODERATING EFFECT OF SIX NON-COGNITIVE SKILLS ON COGNITIVE TASKS
Authors: Surve Bhisaji C , Sharma Bhawna
Published: February 2023

Lifelong learning is the key for many successful professionals to remain competitive in their respective domains. Technology based jobs are very much cogitative in nature. The dictionary meaning of “Cognitive” is relating to the mental process involved in knowing, learning, and understanding things.
In order to handle these jobs, it’s not only IQ of individuals matter but EQ also plays significant role.
Cognitive Task Analysis is techniques to understand about the knowledge, thought processes and goal structures that underlie observable task performance. Moderating effect of EQ in cognitive tasks which is majorly influenced by non-cognitive traits is studied by using PLS based Structural equation modelling in this study.
Development of a Natural Draft Metal Biomass Cookstove for Community Kitchen
Authors: Sandeep Kore  , Kailasnath Sutar  , Akash Waghmare
Published: February 2023

Present work reports details of the design, fabrication, and laboratory testing of a natural draft metal biomass cookstove for a community kitchen. Heat transfer and fluid flow considerations along with experimental data available in the literature are used for the design of the community cookstove. The summation of pressure drop in different sections of the cookstove is compared with the outside pressure drop for the system using buoyancy considerations. The cookstove is fabricated as per the dimensions finalized during the design stage. Laboratory testing of the cookstove is conducted according to Bureau of Indian Standards (BIS) protocol. The tests are conducted under different conditions of main air hole closing viz. 0%, 25%, 75% and 100%. Each test is replicated thrice and an analysis of data is performed using a student’s t-test. The efficiency of cookstove is found to be about 42% i.e., well above the BIS limit of 25% for natural draft metal cookstove. The effect of insulation on the outer body of cookstove is studied experimentally. It is found that the efficiency enhances by about 5.3% due to insulation. The authors found that provision of primary and secondary air holes play a very important role in the performance of the cookstove. When 100% main air holes are closed, the average efficiency of the cookstove is found to be poor (27.3%) due to no supply of secondary air to the combustion chamber of the cookstove.
Prediction of Phase Equilibria and Transport Properties Using ASOG and PRASOG Group Contribution Methods: A Review
Authors: Andrea Jia Xin Lai  , Tomoya Tsuji  , Katsumi Tochigi  , Lian See Tan  , Hiroyuki Matsuda  , Kiyofumi Kurihara
Published: February 2023

Half century has passed since the first version of Analytical Solution of Groups (ASOG) model was proposed. Now the ASOG model is well known as a group contribution method as well as UNIFAC. Although the ASOG model was designed for prediction of vapor-liquid equilibrium around the atmospheric pressure, the applications are extended to not only the phase equilibria in the wide temperature and pressure ranges but also the transport properties. The function forms in the ASOG model, basically composed of Flory-Huggins equation and Wilson equation, can be applied for the prediction of the phase equilibria (vapor-liquid, liquid-liquid, solid-liquid and vapor-solid) and the transport properties (kinematic viscosity, thermal conductivity) of the mixtures with some modifications.
PERLUNYA BRAIN GYM UNTUK MENINGKATKAN KONSENTRASI BELAJAR SISWA
Authors: Khairiyah Ummu , Mariati Pance , Nursalim Mochamad , Rahmasari Diana
Published: February 2023

Penelitian ini bertujuan untuk mengkaji peranan brain gym dalam meningkatkan konsentrasi belajar siswa.Metode penelitian yang digunakan adalah studi kepustakaan dengan mengumpulkan jurnal pada google scholar. Teknik analisis data yang digunakan yakni analisis anotasi bibliografi Hasil dari analisis yang dilakukan didapatkan bahwa konsentrasi belajar merupakan kemampuan siswa yang dapat ditingkatkan melalui latihan, latihan yang mampu meningkatkan konsentrasi salah satunya yakni dengan brain gym. Brain gym merupakan serangkaian gerak sederhana dengan menstimulasi kerja kedua belah otak sehingga bekerja secara sinegis. Brain gym efektif meningkatkan konsentrasi belajar siswa apabila rutin diterapkan setiap hari. Brain gym tidak akan bekerja secara optimal apabila subjek tidak serius melakukan gerakan brain gym. Upaya yang dapat dilakukan supaya Brain Gym bekerja optimal yakni dengan mengenalkan gerakan brain gym kepada siswa secara rutin minimal 10-14 menit sehingga siswa menguasai gerakan brain gym dan dapat diterapkan secara berkelanjutan.
UPAYA SEKOLAH DALAM PENGUATAN KARAKTER TOLERANSI SISWA SMP
Authors: Hidayat Taufik , Yuliatin  , Basariah
Published: February 2023

Penelitian ini membahas tentang upaya sekolah dalam penguatan karakter toleransi antara siswa di SMPN 9 Mataram. Penelitian ini menggunakan pendekatan kualitatif dengan jenis deskriptif. Subjek dalam penelitian yaitu guru PPKn, guru Pendidikan Agama Islam, guru Pendidikan Agama Hindu, guru Pendidikan Agama Kristen dan guru Bimbingan dan konseling di SMPN 9 Mataram, sedangkan informan dalam penelitian ini yaitu Kepala Sekolah, wakasek kurikulum, Ketua Osis dan Siswa di SMPN 9 Mataram. Cara pengumpulan data melalui Observasi, Wawancara, dan Dokumentasi. Teknik analisis data penelitian dilakukan dengan beberapa cara yaitu Reduksi Data, Penyajian Data, Penarikan Kesimpulan, dan Validasi Data. Hasil penelitian menunjukan bahwa upaya sekolah dalam penguatan karakter toleransi antara siswa di SMPN 9 Mataram dilaksanakan dengan cara Integrasi dalam pembelajaran, kegiatan ekstrakurikuler, kegiatan rutin, kegiatan spontan. Faktor pendukung upaya sekolah dalam penguatan karakter toleransi antara siswa yaitu kemauan dari siswa, prasaran & sarana, dan kerjasama antara pendidik, adapun faktor penghambat upaya sekolah dalam penguatan karakter toleransi antara siswa yaitu lingkungan keluarga.
PENGEMBANGAN LEMBAR KERJA PESERTA DIDIK DIGITAL BERBASIS APLIKASI LIVEWORKSHEETS UNTUK SISWA SMA
Authors: Tiara Ratu Tiara Savira , Suherman  , Cucu Atikah
Published: February 2023

Penelitian ini ditujukan untuk menghasilkan produk berupa konten materi yang dikembangkan dalam format visualisasi perangkat ajar berupa lembar kerja peserta didik digital berbasis aplikasi liveworksheets untuk meningkatkan efektivitas pembelajaran serta memudahkan peserta didik dalam proses penyerapan materi. Peneliti menggunakan metode Research and Development (R&D) dengan model ADDIE sebagai pedoman untuk mengembangkan suatu produk yang efektif. Prosedur penelitiannya adalah menganalisis kebutuhan peserta didik, merancang bahan ajar yang dibutuhkan, mengembangkan bahan ajar yang telah dirancang, mengimplementasikannya pada peserta didik serta mengevaluasi hasil implementasi bahan ajar. Hasil pengembangan menunjukkan bahwa E-LKPD pada aplikasi liveworksheets ini dapat meningkatkan motivasi peserta didik karena didalamnya disuguhkan tampilan menarik dengan gambar-gambar serta perpaduan warna yang nyaman dilihat. Pengaksesannya yang mudah, hanya memerlukan jaringan internet yang stabil dalam pengerjaannya. Bertambahnya pengetahuan pendidik mengenai pengembangan bahan ajar, meningkatnya efektivitas pembelajaran serta tumbuhnya motivasi dan minat pada peserta didik merupakan hasil yang didapatkan. Namun, pada kesempatan ini peneliti hanya berfokus pada pengembangan bahan ajar.
ANALISIS PERAN KEPALA SEKOLAH TERHADAP KOMPETENSI PEDAGOGIK GURU
Authors: Itje Tomi , Makaheming Ferdinan , Hohakay Kaswanto Oktofianus , Molle Melky , May Oscard Jefferson Schwietzer
Published: February 2023

Dalam penulisan ini Penulis melihat bagaimana peran kepala sekolah dalam meningkatkan kompetesi pedagogik Guru di SD Unit Pemukiman Trans Jano (UPT) dengan tujuan untuk menjelakan peran kepala sekolah dalam meningkatkan kompetensi pedogogil Guru SD UPT Jano, metode penelitian terkait dengan masalah yang akan diteliti tentang peran kepala sekolah dalam meningkatkan kompetensi pedogogik Guru maka metode penelitian yang akan digunakan ialah metode kualitatifteknik pengumpulan data yang Penulis gunakan adalah observasi, wawancara dan dokumentasi analisi pengumpulan data dilakukan secara interatif dan berlangsun secara terus menerus sampai tuntas sehingga datanya suda jelas, kepala sekolah memiliki peran untuk meningkatan kompetensi pedagogik SD UPT Jano, agar kopetensi pedagogik Guru biasa meningkat.
PENERAPAN PROBLEM BASED LEARNING DALAM UPAYA MENGEMBANGKAN KEMAMPUAN BERPIKIR KREATIF MAHASISWA
Authors: Manurung Alberth , Marini Arita
Published: February 2023

Penelitian ini bertujuan untuk mendeskripsikan penerapan problem based learning dalam upaya mengembangkan kemampuan berpikir kreatif mahasiswa PGSD FKIP Universitas Esa Unggul pada mata kuliah Pembelajaran Matematika SD. Salah satu keunggulan dari model pembelajaran problem based learning yaitu mampu melatih mahasiswa dalam menggunakan berbagai konsep, prinsip dan keterampilan yang telah mereka pelajari untuk memecahkan permasalahan yang sedang dihadapi. Dengan penerapan problem based learning, kemampuan berpikir kreatif dapat berkembang, karena pada kemampuan berpikir kreatif yang diamati dalam penelitian ini berupa kemampuan mengidentifikasi, menganalisis, memecahkan masalah, berpikir logis dan membuat keputusan dengan tepat. karena hasil proses verifikasi menunjukkan bahwa ini signifikan. Ada banyak jenis model pembelajaran berbasis berpikir kreatif yang digunakan untuk mengatasi masalah pendidikan, namun salah satu yang paling efektif adalah model pembelajaran berbasis masalah, yang dengan mensyaratkan setiap anak untuk memiliki seperangkat keyakinan dan nilai yang unik. melengkapi satu sama lain, memungkinkan guru untuk lebih efektif berpikir kreatif untuk setiap siswa saat mereka mengatasi masalah yang diberikan.
PENGEMBANGAN MEDIA PAPAN HITUNG PADA MATA PELAJARAN MATEMATIKA SD
Authors: Midya Yuli Amreta  , Firda Zakiyatur Rofi’ah  , Alfina Luk Luul Markhamah
Published: February 2023

Pengembangan media papan hitung diperlukan untuk menyelesaikan masalah dalam bentuk pertanyaan guna mendapatkan jawaban yang benar. Berdasarkan hasil observasi terdapat berapa siswa siswa kelas II yang belum bisa menyelesaikan soal matematika meskipun sederhana. Dibuktikan dengan kesulitan memahami soal, nilai rendah dalam mengerjakan soal tersebut dan guru menggunakan media papan tulis tanpa menggunakan media pendukung lain yang khusus untuk menjelaskan materi tersebut untuk menunjang proses pembelajaran siswa. Penelitian ini bertujuan untuk menjelaskan pengembangan pada media papan hitung pada materi penjumlahan pada mata pelajaran matematika di kelas II serta mendeskripsikan hasil pengembangan media papan hitung pada materi penjumlahan pada mata pelajaran matematika di kelas II. Metode penelitian ini adalah Research and Development ( R & D), metode penelitian ini digunakan untuk menghasilkan sebuah produk tertentu dan menguji keefektifan produk. Tahap pengembangan yang digunakan penelitian ini mengacu pada pengembangan Borg and Gall yang terdiri dari 10 langkah pengembangan yaitu: potensi dan masalah, pengumpulan data, desain produk, validasi produk, revisi produk, uji coba kelompok kecil, revisi produk, uji coba kelompok besar, revisi produk, hasil produk. Hasil kelayakan media papan hitung dari ahli materi yaitu mendapatkan persentase sebesar 90%, ahli media 98% sedangkan dari ahli bahasa 94% dari kriteria kelayakan, dari hasil perolehan angket respon siswa yang memperoleh presentasi keefektifan media papan hitung sebesar 94% atau sangat layak, dan dapat digunakan dalam pembelajaran.
Ownership Structure Of The Capital Market Earning Management Model: A Meta-Analysis Study
Authors: SURAYYA Surayya , NURDIN Djayani , KASIM Muhamad Yunus , MUSLIMIN Muslimin , KADANG Juliana
Published: February 2023

The purpose of this study is to identify and analyze (1) the ownership structure, which consists of institutional ownership, managerial ownership, and ownership concentration on earning management in the capital market; (2) the Jones Model and Modified Jones Model's moderation of the ownership structure of earnings management in the capital market. This study used a population of 40 research from various articles and as many as 26 articles that passed the selection of data used in research with various criteria. Data analysis techniques use meta-analysis to measure each variable in this study. The results show that institutional ownership does not affect earning management in the capital market. Managerial ownership and concentration of ownership significantly affect earning management in the capital market. Earning management models such as the Jones Model and Modified Jones Model do not moderate the ownership structure, namely institutional ownership, managerial ownership and ownership concentration on earning management in the capital market.
METHOD OF EVALUATION OF MILITARY HELICOPTER PILOT SELECTION CRITERIA: A NOVEL GREY SWARA APPROACH
Authors: Kurnaz Salim , Özdağoğlu Aşkın , Keleş Murat Kemal
Published: February 2023

Helicopter is a very important defence and attack tool for a country’s armed forces (army) (air force). With the rapid progress of technology, the designs of helicopters, the hardware and software elements in the helicopter have also been renewed and developed in parallel with advanced technology. Therefore, it is expected that the pilots who will use helicopters, which are an important flight tool of armed forces, will also have the qualifications to provide the necessary knowledge, skills, and criteria. The aim of the study is to determine the military helicopter pilot selection criteria and to find the importance levels of these criteria. For this purpose, three main criteria as “Health”, “Psychomotor” and “Education and Training” and thirteen sub-criteria were determined. The weights of the determined criteria were found by the Grey SWARA method, which is a current multi criteria decision making tool. According to the results of the analysis, it is found that the most important sub-criteria was “Practical Training”, while the lowest important criteria was the “Height and weight limits” criterion. With this study, the weights of the military helicopter pilot selection criteria were found for the first time with the Grey SWARA method.
A Unified Model for Bipolar Outflows from Young Stars: Apparent Magnetic Jet Acceleration
Authors: Shang 尚 Hsien 賢 , Krasnopolsky Ruben , Liu 劉 Chun-Fan 君帆
Published: February 2023

We explore a new, efficient mechanism that can power toroidally magnetized jets up to two to three times their original terminal velocity after they enter a self-similar phase of magnetic acceleration. Underneath the elongated outflow lobe formed by a magnetized bubble, a wide-angle free wind, through the interplay with its ambient toroid, is compressed and accelerated around its axial jet. The extremely magnetic bubble can inflate over its original size, depending on the initial Alfvén Mach number M
A of the launched flow. The shape-independent slope ∂v

r
/∂r = 2/3t is a salient feature of the self-similarity in the acceleration phase. Peculiar kinematic signatures are observable in the PV diagrams and can combine with other morphological signatures as probes for density-collimated jets arising in toroidally dominated magnetized winds. The apparent second acceleration is powered by the decrease of the toroidal magnetic field but operates far beyond the scales of the primary magnetocentrifugal launch region and the free asymptotic terminal state. Rich implications may connect the jets arising from the youngest protostellar outflows such as HH 211 and HH 212 and similar systems with parsec-scale jets across the mass and evolutionary spectra.
Ring chromosome 14 syndrome: what the dentist should know to manage children with r(14) effec-tively
Authors: Ivanoff Athena E. , Ivanoff Chris S.
Published: February 2023

Introduction: Ring chromosome 14 syndrome, or r(14), is a rare genetic disorder characterized by distinctive facial features, intractable epilepsy, delayed development, intellectual disability, and autism spectrum disorder. With less than 100 documented cases worldwide, the disease is not well known or fully studied. Furthermore, the literature offers little guidance to aid dentists in the management of these patients as r(14) remains undocumented in the dental literature.

Aim: To investigate the manifestations and challenges faced by a group of subjects suffering from r(14), to raise awareness of this syndrome, and to provide tips and suggestions that dentists may find helpful to manage r(14) children effectively. 

Materials and methods: A voluntary survey was administered to the caretakers of 13 r(14) patients who, as of 2019, were registered in the NORD (National Organization for Rare Diseases) global data bank (Ring 14 USA Outreach). The patients were assessed for age, gender, geographic distribution, phenotype, physical appearance, maxillofacial characteristics, presence of oral conditions and abnormalities, malocclusion, epileptic seizures, cognitive abilities, speech, muscle tone, nutrition, autism, and other developmental and behavioral points of interest.

Results: Of the 13 patients queried, 7 were male and 6 were female. The age of the patients ranged from 5 to 49 years. Ten patients were of European ancestry and three were Hispanic, all residing across the U.S. The majority of patients were diagnosed as infants, shortly after commencement of uncontrollable seizures. All the patients had microcephaly and presented with Class II malocclusions. More frequent occlusal anomalies and conditions included diastemata of the anterior teeth, congenitally missing teeth, crowding, and drooling. The majority of subjects was unable to speak, suffered from intractable seizures, and frequently exhibited behavioral outbursts.

Conclusions: A child with r(14) may present a considerable challenge to the dentist and staff, but the dental problems of r(14) children are, for the most part, like those of any other patient and can often be handled by the dentist. Depending on the severity of symptoms, some children with r(14) may be as treatable in the dental office as any other child. 
Rheumatoid arthritis and the proinflammatory cytokine IL-17
Authors: Selimov Pavel , Karalilova Rositsa , Damjanovska Ljubinka , Delcheva Ginka , Stankova Teodora , Stefanova Katya , Maneva Ana , Selimov Teodor , Batalov Anastas
Published: February 2023

Introduction: Rheumatoid arthritis (RA) is the most common inflammatory joint disease. Various proinflammatory cytokines are involved in the pathogenesis of this chronic disorder. It is characterized by the presence of autoantibodies, such as rheumatoid factor and antibodies against citrullinated peptides. The present study focuses on investigation of possible association between the proinflammatory cytokine interleukin 17 and anti-CCP, anti-MCV, and anti-CarP antibodies seropositivity in RA patients.

Aim: To assess serum levels of interleukin 17 (IL-17) in patients with rheumatoid arthritis and healthy controls (HC) and to investigate the relationship between IL-17 and anti-cyclic citrullinated protein (anti-CCP) antibodies, antimutated citrullinated vimentin (anti-MCV) antibodies, and anti-carbamylated protein (anti-CarP) antibodies in patients with RA.

Materials and methods: Forty-seven patients diagnosed with rheumatoid arthritis and 44 healthy controls were included in the study. Serum IL-17 levels were examined in all participants. Anti-CCP, anti-MCV, and anti-CarP antibodies were tested in the group of RA patients.

Results: The mean serum level of IL-17 in RA patients was higher (12.8 pg/ml) than that in healthy controls (7.9 pg/ml), but the difference was not statistically significant (p=0.276). No significant correlation was observed between anti-CCP (+/−) and IL-17 (rs=0.162, p=0.380), and between anti-MCV (+/−) and IL-17 (rs=0.157, p=0.340). A significant positive correlation of moderate value was reported between anti-CarP (+/−) and IL-17 (rs=0.388, p=0.015). 

Conclusions: The present study demonstrated that the IL-17 serum levels in RA patients were increased compared to healthy controls. No correlation was found between ACPA immunological markers and IL-17 levels in patients with RA. A positive correlation was found between anti-CarP antibodies and IL-17 in the patients’ group. The increased level of IL-17 is suggestive of its possible role in the pathogenesis of CarP positive RA patients.
Rhythm and conduction complications after COVID-19 infection in physiological hypertrophy of myocardium (athlete’s heart)
Authors: Vladimirova-Kitova Ludmila , Delchev Slavi , Kitov Spas Ivanov
Published: February 2023

The term ‘athletic heart syndrome’ (AHS) is used to describe specific circulatory and morphological changes in individuals who participate in sports competitions. The syndrome is characterized by normal cardiac function and reversible myocardial remodelling.

The incidence and severity of the post-COVID-19 cardiac pathology in active athletes are so far unclear. One of the complications involving the heart is myocarditis. We present a case of a 23-year-old rower after having a moderate COVID-19 infection. Electrocardiograms showed evidence of a shift in conduction and rhythm disturbances ranging from Group 1 (normal ECG findings) to Group 2 (abnormal ECG findings) on the background of an AHS. Echocardiography (with new methods of evaluating deformity – Global Longitudinal Strain) revealed an area with mildly reduced left ventricular deformity around the apex. To assess the subtle alterations in the myocardium, magnetic resonance imaging was used and focal myocarditis was detected. In our patient, considering the degree of severity of his COVID-19 infection – a moderate one, a decision was taken to perform a clinical and instrumental reassessment of his cardiovascular complications 6 months after the infection.

This clinical case presents two substantial issues. First, is the AHS more susceptible to rhythm and conduction disturbances after a COVID-19 infection than that of a person who does not actively participate in sports? Second, what the reversibility or the definitive nature of these disturbances is, and how this impacts the prognosis associated with an active sporting activity. 
Temperature limits during irradiation in laser-assisted treatment of peri-implantitis - labo-ratory research
Authors: Nachkov Ivan , Zagorchev Plamen , Yaneva Blagovesta
Published: February 2023

Introduction: Peri-implantitis is a relatively new and difficult disease that is becoming more common. Of the different therapeutic options to manage this condition, lasers show certain advantages over other therapeutic alternatives because of their antibacterial potential. 

Aim: The aim of the present study was to investigate the temperature rise of implant surfaces, soft tissues, and bone during irradiation with diode, CO2, and Er:YAG lasers.

Materials and methods: Ten implants inserted in biological models were irradiated with three laser systems with different parameters: a diode laser (980 nm) with power levels of 0.75 W and 1.6 W; a CO2 laser (10600 nm) with power levels of 252 W and 241 W; and an Er:YAG laser (2940 nm) with power levels of 1.5 W, 6.8 W, and 7.5 W. The temperature rise was measured using a specially designed thermal probe (type K thermocouple) with accuracy of ±0.1°C over the range from 20°C to 80°C. The temperature was measured at 5 points – in the implant body, in the mucosa, in the middle part of the implant, in the implant apex, and in the bone around the implant apex. Measurements were obtained at 1 minute working interval.

Results: Diode and CO2 lasers with both parameters used increased significantly the temperature of more than 46°C, whereas the temperature in the Er:YAG laser group was less than 30°C. There was a statistically significant difference between diode, CO2, and Er:YAG lasers in favor of the erbium laser. 

Conclusions: The Er:YAG laser demonstrates the best thermal properties during irradiation of the implant surface. The three working modes tested – 1.5 W, 6.8 W, and 7.5 W – provide safe intervention on both the soft and bone tissues of the implant interface and on the implant itself.
Functional results after reconstruction with modular tumor endoprostheses in patients with malignant bone tumors
Authors: Ivanov Yordan S. , Tsenkov Tsvetan
Published: February 2023

Introduction: The functional outcome in patients after limb salvage surgery, and in particular reconstructions with modular tumor endoprostheses, has been the subject of many international series, but only a few publications mention the functionality in a Bulgarian patient group.

Aim: The aim of the present study was to analyze the functional outcome in a Bulgarian group of patients with malignant bone tumors that underwent resection and reconstruction with modular tumor endoprostheses.

Materials and methods: Our series consists of 14 patients with malignant bone tumors who underwent limb salvage surgery and reconstruction with modular tumor endoprostheses between February 2012 and January 2021. Staging was done using the AJCC staging system for bone sarcoma. The MSTS score system was used to evaluate the functional results.

Results: The mean follow-up time was 38.5 months (range, 8 to 96). The mean MSTS score for our series was 70%. Distant metastases were found in 4 (28%) patients. Local recurrence occurred in 3 (21%) patients. The most severe late complication was a mechanical failure of the expanding mechanism in 1 patient.

Conclusions: Reconstruction with modular tumor endoprostheses offer superb functionality and improved life quality in patients with primary malignant bone tumors.
Intraoperative ultrasound for nonpalpable breast lesions – experience and operative time
Authors: Ivanov Valentin , Dimov Rossen , Marinov Blagoi , Ivanov Valentin , Tashkova Desislava
Published: February 2023

Introduction: The essential tools doctors need to diagnose breast cancer tumors at the early stages and with no clinical presentation are screening mammography and ultrasonography. Nonpalpable breast lesions are a current problem nowadays and there are various types of navigation techniques that are utilized in order to achieve cancer cell-free resection margins in the first place. Intraoperative ultrasound has been proven to be a safe and effective way to excise this type of breast tumors.

Aim: To study the correlation between the experience we obtained while using intraoperative ultrasound for excision of nonpalpable breast lesions, and the duration of surgery. 

Materials and methods: Twenty-five women with nonpalpable breast lesions underwent breast-conserving surgery using ultrasound navigation. Nominal and ordinal data were presented using numbers and percentages. Spearman’s rank-order correlation was used to assess the effect of experience gained on the duration of surgery.

Results: The tumor distribution was 72% malignant tumors and 28% benign. A 100% identification rate in the effective surgical excisions was reported. In the process of gaining experience using the method, the duration of surgery shortened by 30%. No tumor cells on ink were found in all specimens and there was no need for secondary surgeries.

Conclusions: Our results demonstrate a relatively short learning curve, and we believe that breast surgeons should be helped and encouraged to gather adequate expertise to ensure patient safety and gain confidence. 
A review of Trichogramma Westwood parasitoids on eggs of Thaumetopoea pityocampa (Denis & Schiffermüller) in habitats of the Balkan Peninsula and Asia Minor
Authors: Mirchev Plamen , Tsankov Georgi , Georgieva Margarita , Zaemdzhikova Gergana , Matova Maria , Georgiev Georgi
Published: February 2023

Studies on egg parasitoids of the pine processionary moth (Thaumetopoea pityocampa) were conducted during the period 1991-2018 in native localities of the pest on the Balkan Peninsula and in Asia Minor. In Bulgaria the biological material (2510 egg batches and 579273 eggs) was collected in 48 host localities. A number of 650 egg batches and 135611 eggs were studied from the Balkan countries (North Macedonia, Bosnia and Herzegovina, Albania and Greece), and in the Asian part of Turkey (Asia Minor), the biological material was examined from nine habitats. Eight species of egg parasitoids (Ooencyrtus pityocampae, Baryscapus servadeii, B. transversalis, Pediobius bruchicida, Anastatus bifasciatus, Eupelmus vesicularis, E. vladimiri and Trichogramma sp.) were found. The total regulating effect of egg parasitoids in Bulgaria was on average 17.6%, and in the other Balkan countries – 24.9%. Trichogramma sp. was found in 63.1% of the analysed samples in Bulgaria and in 55.6% from the neighboring countries. The percent of parasitism of T. pityocampa eggs by Trichogramma sp. was low - on average 0.39% for Bulgaria and 0.73% for the other Balkan countries. The relative share of the species in the total percentage of parasitised eggs for Bulgaria and the other countries was 2.2% and 2.9%, respectively.  
A new species of Cletocamptus Schmankevitsch, 1875 (Copepoda, Harpacticoida, Canthocamptidae) from Rayong Province, Eastern Thailand
Authors: Boonyanusith Chaichat , Wongkamhaeng Koraon
Published: February 2023

Cletocamptus thailandensissp. nov. was discovered in a water body at the base of a small mountain near the Phang Rat River Delta in Rayong Province, Eastern Thailand. The new species resembles C. goenchim Gómez, Ingole, Sawant & Singh, 2013 and C. koreanus Chang, 2013, but it can be distinguished from these two species based on the armament of the endopodal lobe of the male P5, ornamentations of the abdominal segments, the caudal ramus, the male P3Endp-3, and the relative length of the aesthetasc on the fourth segment of the female antennule. According to the combinations of certain female characteristics, including the number of setae on the P3Endp-2, the relative length of the caudal ramus, the relative length of the inner apical seta on the P3Endp-2, the shape of the P5, and the number of setae on the P3Exp-2, five groups of the Cletocamptus species can be defined.
Experiences of a Nursing Team Working in a Residential Care Facility for Older Adults During the COVID-19 Pandemic
Authors: Doyle Mary , Louw Julia S. , Corry Margarita
Published: February 2023

Experiences of staff working in residential long-term care facilities (LTCFs) during the coronavirus disease 2019 (COVID-19) pandemic are likely to differ from that of staff working in acute hospitals. The aim of the current study was to describe the experiences of the nursing team supporting frail older adults with high medical and care needs living in a LTCF. Using a descriptive qualitative design, data were gathered via one-to-one semi-structured interviews and thematically analyzed. Four themes emerged:
Providing Care During COVID-19
,
Impact of COVID-19 on Staff
,
Organizational Management of COVID-19
, and
Training and Education
. Visitation restrictions and staff shortages impacted all aspects of work life. Staff reported increased stress and exhaustion with COVID-19 infection resulting in long-term health issues. It is important to learn from these experiences to inform and empower staff to manage future outbreaks of infectious diseases. [
Journal of Gerontological Nursing, 49
(3), 40–46.]
A Randomized Trial of Three Routes of Tranexamic Acid Administration in Total Knee Arthroplasty
Authors: Hootsmans Norbert A. M. , Vellanky Smitha , Grady-Benson John , Cremins Michael S.
Published: February 2023

Tranexamic acid (TXA) has been shown to decrease blood loss and transfusion rates across a variety of routes of administration and doses in the setting of total knee arthroplasty (TKA). Oral TXA is less studied but has decreased cost and increased ease of administration. This prospective, randomized study compared the efficacy and cost of three routes of TXA administration in the setting of primary TKA. Primary outcomes were 24-hour hemoglobin loss, calculated blood loss, and blood transfusion rate. One-way analysis of variance, Pearson's chi-square test, and Fisher's exact test were used for statistical analysis. One hundred eleven patients were enrolled. The mean 24-hour hemoglobin loss for the intravenous (IV), oral, and topical TXA groups was 2.50±0.95 g/dL, 2.64±0.94 g/dL, and 2.52±0.90 g/dL, respectively, with no clinical or statistically significant differences among the groups (
P
=.79). Calculated blood loss was not significantly different (
P
=.61) among the IV TXA (1067±371 mL), oral TXA (1127±455 mL), and topical TXA (1027±454 mL) groups. No patients in any treatment group required a blood transfusion. IV, oral, and topical routes of TXA administration offer similar clinical benefits for perioperative bleeding and blood transfusion rate in TKA. Oral TXA provides a cost-benefit relative to the other routes of administration ($14 vs $114 per patient), making it a more cost-effective choice. Oral TXA has additional logistical challenges compared with other routes of administration due to increased absorption time, which may impact its use in clinical practice. [
Orthopedics
. 2023;46(5):285–290.]