bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and analysis of closed loop control of power-converters for forming droop-controlled AC–DC subgrids of an islanded hybrid AC–DC microgrid
Authors: Shravan R. V. S. E. , Vyjayanthi C. 
Published: February 2022

AbstractHybrid AC–DC microgrid (HMG) is formed by connecting separate AC and DC microgrids with an interlinking converter (IC). In islanded mode of operation of the HMG its AC and DC subgrids are droop controlled to achieve power-sharing. The power flow between the subgrids happens through the IC, which regulates the amount of power being transferred based on the values of the frequency of AC bus voltage and the voltage at the DC bus. This paper presents the utilization of power-electronic converters to form the droop-controlled AC–DC subgrids of an islanded HMG which will be beneficial for further studies of IC and HMG. The detailed design and analysis of the closed-loop control system parameters of both the power converters is presented. The results obtained from simulations carried out in MATLAB/Simulink, and the real-time simulation results obtained by implementation using OPAL-RT OP4500 real-time digital simulator hardware are presented for the verification.
Deformation behaviour of strontium titanate between room temperature and 1800 K under ambient pressure
Authors: Taeri S. , Brunner D. , Sigle W. , Rühle M. 
Published: February 2022

Abstract
SrTiO3 was plastically deformed in compression along different crystal axes between room temperature and 1800 K. Data obtained from deformation experiments as well as from light optical and electron optical studies are presented. Irrespective of the compression axis orientation, the material exhibits a strongly pronounced ductile-to-brittle-to-ductile behaviour. For the <100> compression axis the slip system <110>{110} is active both at low and high temperatures. For compression axes other than <100> the <110>{110} system is active only at low temperatures whereas at high temperatures the <100>{110} system dominates. This behaviour is discussed in terms of dislocation core structures.
The deformation response of ultra-thin polymer films on steel sheet in a tensile straining test: the role of slip bands emerging at the polymer/metal interface
Authors: Baumert Birgit , Stratmann Martin , Rohwerder Michael 
Published: February 2022

Abstract
Forming of pre-coated sheet metal becomes of increasing importance in various fields of industrial application. In the recent years, ultra-thin plasma-polymer films have emerged as promising candidates as pre-treatments for steel sheet. Not much, however, is known about the forming behaviour of ultra-thin polymer coatings on ductile substrates, while an extensive literature exists for the reverse case, metal films on polymer, or brittle films on deformable substrates in general. For these cases, advanced models exist, mostly based on the so-called shear lag approximation. The heterogenous, highly localized strain and stress distribution, typical of ductile substrates, as well as out of plane displacements at the interface are disregarded, but cannot be neglected at the high strain levels of interest for elastic polymer films. This paper will focus on the role of slip bands on cracking of ultra-thin polymer films.
Relationships between chemical and tracer diffusion coefficients in strongly ionic crystals
Authors: Belova Irina V. , Murch Graeme E. 
Published: February 2022

Abstract
In this paper, we make extensive use of various sum-rules relating the phenomenological transport coefficients in randomly mixed systems in order to address cation chemical interdiffusion and tracer diffusion in strongly ionic crystals such as alkali and silver halides and alkaline earth fluorides, oxides and silicates showing Schottky disorder. We derive general expressions for the intrinsic and inter-diffusivities for the case of unbound vacancies. Next, we derive a general expression relating the chemical interdiffusivity and the cation and anion tracer diffusivities. This expression reduces to the well-known Darken-Manning and Nernst-Planck equations according to the relative magnitude of the anion mobility. This analysis is repeated for the vacancy-pair mechanism. It is shown that the resulting expressions have exactly the same formal structure as for the unbound vacancies case, but the internal structure of the transport quantities differs because of the different correlation behaviour of the vacancy-pair mechanism compared with that of unbound vacancies.
Misorientations and geometrically necessary dislocations in deformed copper crystals: A microstructural analysis of X-ray rocking curves
Authors: Mughrabi Haël , Obst Bernhard 
Published: February 2022

AbstractIn this study, the deformation-induced misorientations that are typically found in face-centred cubic single crystals deformed in single slip into stage II (and early stage III) of the work-hardening curve are discussed with respect to the experimentally observed broadening of X-ray rocking curves. By making use of well-established empirical relationships between characteristic features of the microstructure and the flow stress, some of the ambiguities of earlier interpretations of rocking curves could be avoided, and relationships between the half-widths of the rocking curves, the density of geometrically necessary dislocations, and the flow stress could be derived for both the tilt misorientations due to the kink bands lying perpendicular to the primary Burgers vector and the twist misorientations originating from the dislocation networks (grids, sheets) lying parallel to the primary glide plane. An evaluation of largely unpublished experimental rocking-curve data obtained on different crystallographic sections of deformed copper single crystals yielded a linear relationship between the broadening of the rocking curves and the flow stress. In terms of the predictions of the model developed, this implies that the ratio of the density of the geometrically necessary dislocations (that are responsible for the misorientations) to the total dislocation density remains constant during deformation, at least up to flow stresses of about 50 MPa. The absolute densities of the geometrically necessary dislocations are found to be a small fraction (at most ca. 5%) of the total dislocation densities. In terms of the evolution laws of deformation-induced dislocation boundaries proposed in the literature, it is concluded that both kink bands and grids/ sheets follow the characteristics of so-called geometrically necessary boundaries.
Nanoindentation applied on a tungsten–copper composite before and after high-pressure torsion
Authors: Schöberl Thomas , Sabirov Ilshat , Pippan Reinhard 
Published: February 2022

Abstract
Nanoindentation experiments were performed before and after severe plastic deformation of W–Cu composites at room temperature, 200, and 400 °C. The strains were induced by high-pressure torsion (HPT). For the highest degrees of deformation, a particle size of 10 – 20 nanometer was achieved. The nanohardness of copper increased remarkably with increasing deformation, the hardness of tungsten was enhanced only slightly. A temperature of 400 °C during HPT significantly lowered the Cu hardness, probably recrystallisation during HPT had taken place, the hardness of tungsten, however, kept unaffected. With decreasing particle size, the influence of the adjacent material on the measured properties increased as well as the scatter of hardness and modulus. Proceeding to very small particle and grain sizes, the particles became smaller than the size of the indent. Thus, hardness and modulus values reflected some average over that of pure tungsten and copper.
Inklusive Lerngruppen im DaZ- und DaF-Unterricht – am Beispiel neu zugewanderter tauber und schwerhöriger Schülerinnen und Schüler
Authors: Marx Nicole , Urbann Katharina 
Published: February 2022

Zusammenfassung
Inklusive Lerngruppen, wie taube und schwerhörige Schülerinnen und Schüler mit einem zusätzlichen Förderbedarf im Bereich DaZ, wurden bislang im Rahmen der Fremdsprachendidaktik kaum betrachtet. Der Beitrag versucht eine Zusammenfassung von Informationen über sprachliche Erwerbsverläufe, Lehrkraftausbildung und eingesetzte Unterrichtsmaßnahmen für diese Zielgruppe und stellt Desiderate für die Weiterarbeit in diesen Bereichen auf.
The effects of G protein-coupled receptor 30 (GPR30) on cardiac glucose metabolism in diabetic ovariectomized female rats
Authors: Shahbazian Mohammad , Jafarynezhad Faezeh , Yadeghari Maryam , Farhadi Zeinab , Samani Sanaz Lotfi , Esmailidehaj Mansour , Safari Fatemeh , Azizian Hossein 
Published: February 2022

Abstract

Background
Diabetic cardiometabolic disorders are characterized by significant changes in cardiac metabolism and are increased in postmenopausal women, which emphasize the role of 17β-estradiol (E2). Despite this, there are few safe and effective pharmacological treatments for these disorders. The role of G protein-coupled estrogen receptor (GPR30), which mediates the non-genomic effects of E2, is mostly unexplored.

Methods
In this study, we used ovariectomy (menopausal model) and type 2 diabetic (T2D) rats’ models to evaluate the preclinical action of G-1 (GPR30 agonist) against cardiometabolic disorders. T2D was induced by a high-fat diet and a low dose of streptozotocin. G-1 was administrated for six weeks after the establishment of T2D.

Results
We found that G-1 counteracts the effects of T2D and ovariectomy by increasing the body weight, reducing fasting blood sugar, heart weight, and heart weight to body weight ratio. Also, both ovariectomy and T2D led to decreases in the cardiac protein levels of hexokinase 2 (HK2) and GLUT4, while G-1–treated female rats reversed these changes and only increased HK2 protein level. In addition, T2D and ovariectomy increased glucose and glycogen content in the heart, but G-1 treatment significantly reduced them.

Conclusions
In conclusion, our work demonstrates that G-1 as a selective GPR30 agonist is a viable therapeutic approach against T2D and cardiometabolic diseases in multiple preclinical female models.
From Persuasion to Acceptance of Closeness: La Projimidad as an Essential Attribute of God in Luke 10:25–37
Authors: Bonilla Diego Fernando Bedoya , Mora Carlos Arboleda 
Published: February 2022

Abstract
The linguistic method of the New Rhetoric and Argumentation (developed by authors such as Chaim Perelman and Lucie Olbrechts-Tyteca) seeks to persuade an audience utilizing logical and practical arguments, in order to achieve adherence to a thesis that wants to be effectively communicated. This method can be applied to biblical texts to convince about an issue and produce a performative (transforming) effect. This article aims to apply some elements of this method to the parable of the Good Samaritan in Luke 10:25–37. Jesus, with the argumentative force of metaphor, not only answers the question “who is my neighbor?” but also reveals an eventual attribute of God: closeness. In the Samaritan, who is moved with compassion to care for a wounded man, God’s proximity is revealed. In the Samaritan’s mercy, God is manifested as an event of closeness.
“Opioids are opioids” – A phenomenographic analyses of physicians’ understanding of what makes the initial prescription of opioids become long-term opioid therapy
Authors: Ljungvall Hanna , Öster Caisa , Katila Lenka , Åsenlöf Pernilla 
Published: February 2022

Abstract

Objectives
To explore prescribers’ understanding of what makes initial prescription of opioids become long-term opioid therapy (opioids >90 days).

Methods
A qualitative research design, phenomenography, was used for this study. Fifteen attending physicians working within primary, secondary and tertiary care in Sweden in the fields of general practice, rehab medicine, orthopedic surgery, neurosurgery, or obstetrics and gynecology were purposively recruited consecutively until categorical saturation was reached. Semi-structured interviews were used for data collection. The transcripts were analyzed and categorized by two researchers. A third researcher checked for consistency between the data and the categories. An outcome space was constructed representing the logical relationship between the categories.

Results
The analysis identified six categories: The addictive opioid, The deserving patient, The ignorant prescriber, The lost patient, The compassionate prescriber, and The exposed prescriber. The differences in conceptions among the categories were clarified through three main contributors related to opioid therapy: prescriber’s characteristics, patient’s characteristics, and the healthcare organization.

Conclusions
Opioids were understood as being addictive with long-term use promoting a downward spiral of tolerance and withdrawal driving the pain, leading to continued prescription. Long-term opioid therapy could be justified for patients who improved in function, and who were perceived as trustworthy. Inadequate follow-up of patients, poor training in pain management and addiction medicine, personal attitudes and beliefs about opioids, a perceived professional obligation to treat patients with pain, and lack of collegial support, were factors understood to promote clinically unindicated long-term opioid therapy.
A genetic algorithm for image reconstruction in electrical impedance tomography for gesture recognition
Authors: Hafsa Mariem , Ben Atitallah Bilel , Ben Salah Taha , Essoukri Ben Amara Najoua , Kanoun Olfa 
Published: February 2022

Abstract
Electrical impedance tomography (EIT) is an imaging method for characterizing the inner conductivity distribution of an object based on the measured boundary voltages resulting from the injection of an AC signal, followed by an image reconstruction procedure. An algorithm tries to solve an ill-posed inverse problem making it challenging to reconstruct an accurate image. To overcome this, we propose a genetic algorithm (GA) for the image reconstruction with a non-blind search method considering prior knowledge about the possible conductivity distribution in the initial search space. To validate the algorithm, experiments have been conducted in a water tank. The algorithm’s performance was evaluated regarding image quality and processing time, being able to minimize the corresponding quality function to 0.0505 with 100 generations using the non-blind search and the uniform crossover/random mutation. Compared to traditional methods, the GA achieves significantly better image quality. It has been implemented as an image reconstruction algorithm for gesture recognition. EIT measurements have been conducted with six persons performing American sign numbers (0–9) resulting in 1800 reconstructed images. They were classified by a previously developed convolutional neural network (CNN), reaching a 92 % accuracy, which is a very good achievement in the case of multiple subjects.
STUDI KOMPARASI MOTIVASI BELAJAR SISWA MATA PELAJARAN IPS ANTARA YANG DIAJARKAN DENGAN GAYA MENGAJAR EKSPOSITORI DAN CERAMAH PADA KELAS VIII SMPN 6 SEMARANG
Authors: Mukti Amir , Purnomo Arif , Ginanjar Asep 
Published: February 2022

IPS not just learning the process of interaction between educators and learners with learning resources in a certain environment, with ekspositori learning strategies teachers were able to control the sequence and extent of learning material, he can know the extent to which students master learning materials delivered. Through the learning strategy ekspositori in addition to the students can be heard through the utterance of a learning material, also at once students can see or observing (through the implementation of the demonstration). Obstacles faced by IPS teacher at SMP 6 Semarang is the presumption IPS in the lessons students are always related to memorize and write so much. This resulted in students are not motivated to focus during the following lesson IPS. Although for most students still consider the lessons of IPS is the preferred lesson.

Pembelajaran IPS bukan sekedar proses interaksi antara peserta didik dengan pendidik dan sumber belajar dalam lingkungan tertentu, Dengan strategi pembelajaran ekspositori guru mampu mengontrol urutan dan keluasan materi pembelajaran, ia dapat mengetahui sampai sejauh mana siswa menguasai bahan pembelajaran yang disampaikan. Melalui strategi pembelajaran ekspositori selain siswa dapat mendengar melalui penuturan tentang suatu materi pembelajaran, juga sekaligus siswa bisa melihat atau mengobservasi (melalui pelaksanaan demonstrasi).Kendala yang dihadapi oleh guru IPS di SMPN 6 Semarang ialah anggapan para siswa dalam pelajaran IPS selalu berkaitan dengan menghafal dan menulis yang begitu banyak. Hal ini yang mengakibatkan siswa tidak termotivasi untuk fokus selama mengikuti pelajaran IPS. Walaupun bagi sebagian siswa masih banyak yang menganggap pelajaran IPS merupakan pelajaran yang disukai.
EFEKTIVITAS METODE SOSIODRAMA MATA PELAJARAN IPS KELAS VIII SMP NEGERI 13 SEMARANG
Authors: Susanti Febri , . Tukidi , Putri Noviani Achmad 
Published: February 2022

This research aims to determine the effectiveness of the use of sociodrama learning methods, the activities of learners, the response of learners, and the learning outcomes of learners after using the method of sociodrama learning IPS material changes in Indonesian society in the period of colonialism and the growth of nationality spirit. This research type is pre experiment with research design one group pre test post test. The population of this research is all students of class VIII SMP Negeri 13 Semarang. Data collection techniques used questionnaires, observations, tests, documentation. The result of the research shows: (1) effective sociodrama method used with effectiveness level 82,35% in very good criterion, (2) student activity in sociodrama learning included in good category with score 884, (3) student response in good category with score 63,91 and (4) learners' learning result increase, initially only 7 students reaching KKM value with average score 58,6 to 34 students reach KKM value with average value 87,06.

Penelitian ini bertujuan untuk mengetahui efektivitas penggunaan metode pembelajaran sosiodrama, aktivitas peserta didik, respon peserta didik, dan hasil belajar peserta didik setelah menggunakan metode sosiodrama pada pembelajaran IPS materi Perubahan Masyarakat Indonesia pada Masa Penjajahan dan Tumbuhnya Semangat Kebangsaan. Jenis penelitian ini adalah pre eksperimen dengan desain penelitian one group pre test post test. Populasi penelitian ini adalah seluruh peserta didik kelas VIII SMP Negeri 13 Semarang. Teknik pengumpulan data menggunakan angket, observasi, tes, dokumentasi. Hasil penelitian menunjukkan: (1) metode sosiodrama efektif digunakan dengan tingkat efektivitas 82,35% dalam kriteria sangat baik, (2) aktivitas peserta didik dalam pembelajaran sosiodrama termasuk dalam kategori baik dengan skor 884, (3) respon peserta didik dalam kategori baik dengan skor 63,91 dan (4) hasil belajar peserta didik meningkat, awalnya hanya 7 peserta didik yang mencapai nilai KKM dengan rata-rata nilai 58,6 menjadi 34 peserta didik mencapai nilai KKM dengan rata-rata nilai 87,06.
IMPLEMENTASI PENDIDIKAN KARAKTER DALAM PEMBELAJARAN IPS DI SMP NEGERI 34 SEMARANG
Authors: Pratiti Nolix , Purnomo Arif , Hermanto Fredy 
Published: February 2022

Character education is highly emphasized in the education practice at schools as a major step in dealing with students' moral degradation and 21st-century challenges. The purpose of research is to know the planning, implementation, and evaluation phases conducted by social science teachers to implement character education. This research using descriptive qualitative study by setting the location of research at SMPN 34 Semarang. The results showed that: (1) Planning includes the teachersâ€™ understanding of the importance of character education; the selection of character values adapted to the Basic Competence and the studentsâ€™ conditions; and the inclusion of character values in learning media, (2) implementation of learning at the introduction stage is by warming up the students; the core stage is by using lecture method, discussion, role model by teacher, and reward punishment; (3) evaluation by the teacher to assess the studentsâ€™ characters is by observation and written in attitude evaluation journal.

Pendidikan karakter sangat ditekankan dalam penyelenggaraan pendidikan di sekolah sebagai langkah utama dalam menghadapi degradasi moral pelajar dan tantangan abad 21. Tujuan penelitian adalah mengetahui tahap perencanaan, pelaksanaan, dan evaluasi yang dilakukan guru IPS untuk mengimplementasikan pendidikan karakter. Metode yang digunakan adalah penelitian kualitatif deskriptif dengan mengambil lokasi penelitian di SMP Negeri 34 Semarang. Hasil penelitian menunjukkan bahwa: (1) Perencanaan meliputi pemahaman guru tentang pentingnya pendidikan karakter; pemilihan nilai karakter yang disesuaikan dengan Kompetensi Dasar dan kondisi peserta didik; serta mencantumkan nilai karakter dalam perangkat pembelajaran, (2) pelaksanaan pembelajaran tahap pendahuluan dengan mengkondisikan peserta didik; tahap inti dengan menggunakan metode ceramah, diskusi, keteladanan guru, dan pemberian reward punishment; (3)evaluasi dilakukan guru IPS untuk menilai karakter peserta didik dengan pengamatan yang kemudian ditulis di jurnal penilaian sikap.
EFEKTIVITAS PEMBELAJARAN IPS MENGGUNAKAN MODEL PEMBELAJARAN TUTOR SEBAYA PLUS PADA SISWA KELAS VIII SMP NEGERI 7 SEMARANG
Authors: FAJRIN FITROTUL , Salam Rudi 
Published: February 2022

The 2013 curriculum makes students the center of learning, but there are still many teachers becoming the center of learning in the classroom. Students have difficulty in studying social studies because they tend to feel bored, bored, and like listening to stories when the teacher explains. While students who catch lessons quickly, are lazy to share with their friends, for fear of competition. Researchers provide a peer tutoring learning model plus in learning social studies subjects. The experimental method used in this study is a quasi-experimental method. This design uses two groups, namely the experimental group and the control group. Based on the analysis of peer tutoring learning models plus effective on social studies results of VIII grade students of SMP Negeri 7 Semarang with the indicators achieved as follows. (1) The ability of the teacher in managing social studies learning for the experimental class gets very good criteria with the number of points 73 while for the control class gets the number of pont 58. (2) The activity of students in social studies learning for the experimental class gets very active criteria with a number of 97% while for the control class to get the amount of 12.5%. (3) The average posttest score of the control class (8G) was 80.66 and the experimental class (8F) was 87.92. (4) Positive responses of students in social studies learning for the experimental class get very active criteria with a total of 94% while for the control class get a total of 56%.
Kurikulum 2013 menjadikan peserta didik sebagai pusat pembelajaran, akan tetapi masih banyak guru menjadi pusat pembelajaran dikelas. Peneliti memberikan model pembelajaran tutor sebaya plus dalam pembelajaran mata pelajaran IPS. Metode eksperimen yang digunakan dalam penelitian ini adalah metode eksperimen semu. Desain ini menggunakan dua kelompok, yaitu kelompok eksperimen dan kelompok kontrol. Berdasarkan analisis model pembelajaran tutor sebaya plus efektif terhadap hasil IPS peserta didik kelas VIII SMP Negeri 7 Semarang dengan indikator yang dicapai sabagai berikut. (1) Kemampuan guru dalam mengelola pembelajaran IPS untuk kelas eksperimen mendapat kriteria sangat baik dengan jumlah poin 73 sedangkan untuk kelas kontrol mendapatkan jumlah pont 58. (2) Aktivitas peserta didik dalam pembelajaran IPS untuk kelas eksperimen mendapat kriteria sangat aktif dengan jumlah 97 % sedangkan untuk kelas kontrol mendapatkan jumlah 12,5% . (3) Nilai rata-rata posttest kelas kontrol (8G) sebesar 80,66 dan kelas eksperimen (8F) sebesar 87,92. (4) Respon positif peserta didik dalam pembelajaran IPS untuk kelas eksperimen mendapat kriteria sangat aktif dengan jumlah 94 % sedangkan untuk kelas kontrol mendapatkan jumlah 56%.