bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determining the efficiency of local heat recycling wastewater based on a heat exchanger
Authors: Kunitskiy V. A. , Lukin S. V. 
Published: September 2024

RELEVANCE. The authors research the potential energy, economic and environmental effects of using local heat recovery from wastewater generated in showers. At the moment in Russia, almost all household wastewater is disposed of in sewer networks without the beneficial use of the heat that they possess. It is important to determine the effect of implementing this method of heat recovery, to identify and analyze the problems that prevent this from being done.THE PURPOSE. The purpose of the work is to determine the potential effect of using local heat recovery from wastewater generated in showers.METHODS. Based on a verified mathematical model of the heat exchanger, the energy effect from the individual use of the shower room is determined. A number of assumptions are applied to the heat consumption structure of an individual building and, based on available data on the average annual heat consumption of residential buildings in Moscow, the economic and environmental effect of energy-saving measures is calculated.RESULTS. Relative savings within the annual heat consumption of a building with a decentralized and centralized hot water supply system were 5,3% and 3,1%, respectively (64 and 37 GCal). Fuel economy amounted to: 9145 toe and 5227 toe for a building with a decentralized and centralized hot water supply system, respectively (14,5 and 8,5 thousand tons of CO2-eq). The payback period for energy-saving measures for the case of a decentralized hot water system based on an instantaneous electric water heater was 1,5 years.CONCLUSION. Local waste heat recovery makes it possible to obtain a significant energy and environmental effect within any locality, but at the moment there are no measures to support consumers implementing energy-saving measures. Currently, this method of heat recovery is of interest only to those consumers whose source of thermal energy for the needs of hot water supply is electricity.
Control of deposits on pipeline systems by the method of free oscillations
Authors: Garnyshova E. V. , Izmaylova E. V. 
Published: September 2024

RELEVANCE. There are a large number of heat exchangers in operation enterprises that operate under various temperature conditions. Steam, hot water, heated products of oil refining and other industries, which may contain oxides of iron, aluminum, calcium sulfate silicates, etc., are used as a heating agent. The efficiency of the heat exchange equipment depends on the condition of the heating surfaces. Contamination of these surfaces with various deposits dramatically reduces the heat transfer coefficient, which leads to a significant increase in heat consumption. The nature of the deposits depends on the properties of the heating agent and the heated medium.THE PURPOSE. The purpose is to assess the possibility of controlling deposits on the surfaces of heat exchange equipment by the free oscillation method. The presence of deposits changes the mass of structures and, consequently, the natural frequencies of vibrations, the analysis of which can determine not only the presence and thickness of deposits, as well as their appearance.METHODS. The paper shows the results of experimental studies conducted using a hardware and software package and calculations of natural vibrations of the surfaces of heat exchange equipment in the ANSYS software package to identify their dependence on the thickness and density of deposits. A plate, a pipe, and a pressurized pipe were modeled as heat transfer surfaces.RESULTS. The results obtained experimentally and computationally coincided, and it was concluded that the free oscillation method makes it possible to determine not only the presence of deposits on heat exchange surfaces, but their thickness and appearance.CONCLUSION. The free oscillation method can detect deposits in a timely manner and monitor their condition, which in turn will, reduce overall operating costs, increase energy efficiency and extend service life.
FADED EXAMPLE SEBAGAI ALAT UNTUK MEMFASILITASI PEMBELAJARAN MATEMATIKA SEKOLAH
Authors: Nabuasa Adit , Sensiana Blegur Irna Karlina 
Published: September 2024

Pembelajaran harus dirancang dengan siswa sebagai pusatnya, yaitu siswalah yang secara aktif membangun pengetahuan. Sedangkan peran guru sebagai fasilitator yaitu seseorang yang memfasilitasi siswa untuk membangun pengetahuan secara efektif dan efisien. Salah satu tindakan yang dapat mewujudkan peran guru ini adalah melalui pemilihan strategi pembelajaran yang tepat. Menurut Cognitive Load Theory, pemilihan strategi pembelajaran sebaiknya mempertimbangkan pengetahuan awal siswa. Siswa dengan pengetahuan awal rendah memerlukan tuntunan secara eksplisit (explicitly guided instruction), sebaliknya siswa dengan pengetahuan awal yang tinggi dapat belajar dengan tuntunan yang implisit (implicitly guided instruction). Karena itu pemilihan strategi yang mengkombinasikan kedua prinsip ini pada pembelajaran matematika di kelas dengan pengetahuan awal siswa yang beragam nampaknya tepat untuk diterapkan. Salah satu strategi yang dimaksud adalah faded example. Strategi ini merupakan transisi dari belajar secara explicit guidance ke implicit guidance secara bertahap. Karena itu strategi ini tetap memfasilitiasi siswa baik yang berpengetahuan awal rendah maupun tinggi untuk membangun pengetahuan secara mandiri. Artikel ini merupakan study literature yang bertujuan untuk membahas tentang strategi faded example. Lebih lanjut contoh desain pembelajaran pada materi trigonometri dan bagaimana strategi ini memfasilitasi pembelajaran matematika siswa juga dibahas dalam artikel ini.
KRITERIA KESALAHAN SISWA-SISWI KELAS X SMA NEGERI TAMALABANG DALAM MENYELESAIKAN SOAL CERITA TENTANG SISTEM PERSAMAAN LINIER TIGA VARIABEL (SPLTV)
Authors: Imamastri Puling Tang Melki , Marianti Loban Jeni 
Published: September 2024

Sistem persamaan linear tiga variabel merupakan salah satu materi dalam matematika yang mulai diperkenalkan dalam jenjang pendidikan pada sekolah menengah atas. Tujuan pembelajaran SPLTV di tingkat SMA dan sederajat adalah penyelesaian masalah. Pembelajaran SPLTV diawali dengan mengenali tentang bentuk umum dari SPLTV itu sendiri . Penelitian ini dikategorikan sebagai penelitian kuantitatif karena melakukan perhitungan rata-rata nilai siswa-siswi kelas X SMA Negeri Tamalabang antara tes awal dan tes akhir. Hasil tes yang diperoleh peneliti menunjukkan bahwa pada indikator membuat model matematika dan menentukan penyelesaian SPLTV dengan metode Eliminasi dan membuat model matematika dan menentukan penyelesaian SPLTV dengan metode eliminasi dan subsitusi dengan tingkat kesalahannya tergolong tinggi dengan presentase kesalahan sebesar 83,33%. Kesalahan siswa pada indikator mengidentifikasi SPLTV khusus dan penyelesaiannya. Sedangkan besaran yang ada dalam masalah soal cerita ke dalam variabel matematika yang dilambangkan dengan huruf-huruf pada sistem persamaan membuat model berdasarkan soal cerita tergolong sangat rendah dengan presentase kesalahan sebesar 50%. Perlu dilakukan evaluasi dan strategi belajar yang mengarah pada penyederhanaan konsep belajar yang dapat membuat para siswa terangsang untuk lebih tertarik pada proses KBM matematika.
ANALISIS KEMAMPUAN PEMAHAMAN RELASIONAL PESERTA DIDIK DITINJAU DARI SELF DIRECTED LEARNING
Authors: Bince Kumanireng Lusia , Kiang Lagamakin Arkadius 
Published: September 2024

Tujuan dari penelitian adalah untuk menganalisis kemampuan pemahaman relasional peserta didik ditinjau dari self directed learning. Jenis Penelitian ini merupakan deskriptif kualitatif yang dilakasanakan di SMA Negeri 1 Larantuka pada peserta didik kelas X MS 1 berjumlah peserta didik, yakni orang yang memiliki self directed learning tinggi, orang dengan self directed learning sedang, dan orang dengan self directed learning rendah. Instrumen yang digunakan pada penelitian ini adalah angket self directed learning, soal tes kemampuan pemahaman relasional dan pedoman wawancara. Hasil penelitian menunjukan bahwa peserta didik yang memiliki kemampuan self directed learning pada tingkat tinggi dapat memenuhi tiga indikator kemampuan pemahaman relasional yakni, 1) peserta didik mengetahui konsep yang sesuai dengan soal yang diberikan; 2) menerapkan suatu metode dan prosedur yang sesuai dengan permasalahan yang diberikan; 3) mampu menjelaskan alasan penggunaan metode dan prosedur tersebut. Sedangkan, self directed learning pada tingkat sedang memenuhi indikator point 1 dan point 2; Self directed learning pada tingkat rendah hanya memenuhi indikator point 1
MENINGKATKAN PRESTASI BELAJAR MATEMATIKA SISWA DENGAN MEDIA “MILAK DULAK”
Authors: D. Kornelis Marsen , S.P. Hun Welis , L. Morib Poniam , D. Djong Kristoforus , B.N.Dosinaeng Wilfridus 
Published: September 2024

Penelitian Tindakan Kelas (PTK) ini bertujuan untuk meningkatkan prestasi belajar matematika siswa melalui penggunaan media pembelajaran milak dulak. Subyek dari penelitian ini adalah guru dan semua siswa kelas 5 SDN Oefoe Kecamatan Rote Barat Tahun Pelajaran 2023/2024. Sedangkan obyek penelitiannya yaitu aktivitas siswa, kemampuan berhitung siswa dan Kemampuan guru dalam mengelola pembelajaran. Media milak dulak merupakan media berbentuk bambu berwarna yang digunakan untuk mengajarkan perkalian pada siswa Kelas V. Penelitian ini dilakukan dalam dua siklus dengan lima tahapan yaitu: perencanaan, tindakan, pengamatan, refleksi, dan perencanaan ulang. Instrumen penelitian yang digunakan yaitu: tes hasil belajar, lembar observasi kemampuan guru dalam mengelola pembelajaran dan lembar observasi aktivitas siswa. Siklus dikatakan berhasil jika paling sedikit 70% siswa tuntas. Hasil penelitian menunjukkan bahwa: terjadi peningkatan skor persentase jumlah siswa yang tuntas yaitu 56% pada Siklus I menjadi 89% pada Siklus II sehingga dapat disimpulkan bahwa pembelajaran matematika dengan menggunakan media milak dulak telah berhasil di Siklus II. Penghitungan skor n-gain yang dilakukan memperoleh skor 0,32 sehingga dapat disimpulkan bahwa terjadi peningkatan prestasi belajar matematika siswa dari Siklus I ke Siklus II dengan kategori peningkatan sedang.
PROFIL KEMAMPUAN SISWA KELAS VII DALAM MENYELESAIKAN SOAL CERITA PADA MATERI BILANGAN BULAT
Authors: F. Mbari Maria , D. Djong Kristoforus , V. Uskono Irmina , D Nai Yustinus 
Published: September 2024

Tujuan dari penelitian ini adalah untuk mendeskripsikan profil kemampuan siswa kelas VII dalam menyelesaikan soal cerita pada materi bilangan bulat Penelitian ini merupakan penelitian kualitatif yang dilaksanakan di kelas VII SMPK St. Theresia. Subjek penelitian terdiri dari satu siswa dengan kemampuan matematika tinggi (ST), satu peserta didik dengan kemampuan matematika sedang (SS), dan satu peserta didik dengan kemampuan matematika rendah (SR). Instrumen penelitian terdiri dari instrumen utama yaitu peneliti sendiri, dan instrumen pendukung yaitu tes penyelesaian soal cerita matematika materi bilangan bulat, dan pedoman wawancara. Hasil penelitian menujukkan bahwa subjek dengan kemampuan tinggi mampu memahami soal dengan baik, menerjemahkan soal kedalam model matematika, serta menyelesaikan model matematika, dan menentukan jawaban atas masalah pada soal cerita; subjek dengan kemampuan matematika sedang pada nomor 1 belum mampu mencapai empat indikator dalam kemampuan menyelesaikan soal cerita, tetapi pada nomor 2 peserta didik dengan kemampuan matematika sedang mampu mencapai empat indikator sehingga hasil yang diperoleh sesuai. (3) subjek dengan kemampuan matematika rendah belum memahami soal, menerjemahkan soal kedalam model matematika, menyelesaikan model matematika dan memperoleh jawaban atas masalah pada soal sehingga hasil yang diperoleh salah
Histopathological Features of Colorectal Polyps and Tumors at Sumber Waras Hospital from 2015-2023
Authors: Jovial Jovial , Sugiharto Sony 
Published: September 2024

<div><table cellspacing="0" cellpadding="0" align="left"><tbody><tr><td align="left" valign="top"><p><em>Colorectal tumours pose a significant global health issue, including in Indonesia. The development of colorectal polyps and tumours involves various risk factors such as poor lifestyle choices, male gender, and advancing age. This study aims to determine the characteristics of patients with colorectal polyps and tumours, their histopathological features, and the most common gender and age group for each histopathological feature. The study was conducted at Sumber Waras Hospital, implementing a descriptive cross-sectional approach with retrospective data of 113 patients with colorectal polyps and tumours from 2015-2023. This study's findings indicate that most patients were males (58.4%), with the highest number in the 61-70 age group (29.2%). Among non-neoplastic lesions, inflammatory polyp was the most prevalent histopathological finding (18.3%), whereas adenocarcinoma (NOS) was the most common feature among all neoplastic lesions (53.3%). All non-neoplastic lesions were predominantly found in males. Neoplastic lesions such as adenocarcinoma (NOS), mucinous adenocarcinoma, neuroendocrine tumours, and lymphoma were also more prevalent in males. In contrast, adenoma, signet ring, and squamous cell carcinoma were more frequently found in females. Non-neoplastic lesions such as hamartoma were most common in the 11-20 age group, while hyperplastic and inflammatory polyps were prevalent in the 61-70 age group. Neoplastic lesions such as adenoma were most prevalent in the 61-70 and 71-80 age groups; mucinous adenocarcinoma and lymphoma in the 51-60 age group; adenocarcinoma (NOS), squamous cell carcinoma, and neuroendocrine tumours in the 61-70 age group; as well as signet ring cell carcinoma in the 71-80 age group. To reduce the prevalence of colorectal polyps and tumours, it may be crucial to consider performing histopathological examinations for a thorough evaluation, given their wide variety that requires different diagnostic and treatment strategies. </em><em></em></p><p class="TableParagraph"><strong><em> </em></strong></p></td></tr></tbody></table></div><p><strong><em>Keywords: Age Group, Colorectal Polyp, Colorectal Tumor, Gender, Histopathological Features</em></strong></p>
‘Slow Time Like the Present’
Authors: Leeming Beatrice 
Published: September 2024

Abstract
Romanian New Wave cinema (rnw) has been recognised as a medium that addressed the way people felt about their historical trauma, a vernacular insertion nuancing declarations that Nicolae Ceausescu was a ‘megalomaniacal dictator’, and a means to attract and negotiate international interest in the country’s culture. rnw was a subversive and self-conscious commentary on the experience of transition from communism to capitalism as much as aesthetic entertainment. This article argues that rnw was critical of the idea of a transformative watershed – predominant in conceptions of 1989 across the Euro-Atlantic space – and qualifications of the teleological imaginary that encompassed it. Drawing on film theory, as well as the tension between collective and individual memory, the author argues that rnw was a self-conscious and creative effort at commemorating a past, contributing to a more democratic debate about the ways in which recent history bears upon the present.
Peran Produser Televisi dalam Menghadapi Krisis Produksi Berita pada Program Election di Nusantara TV
Authors: Yunisa Rizki Sendy , Ramadhani Beby , Belgia Ratu Jasmine , Harisnanda Rizky 
Published: September 2024

ABSTRAKSI
Produser memegang peran penting dalam memastikan kelancaran dan kualitas program. Ruang lingkupnya seorangproduser bertanggung jawab terhadap penciptaan dan pengembangan ide untuk produksi acara televisi, Mereka bisadikatakan sebagai ketua tim, mengkoordinasikan berbagai elemen produksi dan memastikan konten berita yang disampaikan akurat, informatif dan menarik. Tujuan dalam penelitian ini adalah mengidentifikasi agenda setting dalamproduksi berita program Election di Nusantara TV. Metode Penelitian yang digunakan adalah metode penelitiandesktriptif kualitatif dengan melakukan pengumpulan data berupa wawancara dan observasi yang dilakukan langsung di kantor statisun televisi Nusantara TV dengan produser program Elction. Peneltian ini menggunakan teori agenda setting sebagai landasannya. Hasil penelitian ini Pada penelitian ini dapat ditemukan bahwa breaking news adalah sebuah krisispada suatu program. Pada breaking news yang harus ditayangkan, peran produser di haruskan untuk menyelaraskanberita yang tayang sesuai dengan kebijakan redaksional media. hal ini dilihat dari pemilihan narasumber, sudut pandangpembawaan berita, sehingga sesuai dengan agenda media.
Kata Kunci : Agenda Setting, Produser Televisi, Produksi Berita, Nusantara TV

ABSTRACT
Producers play a crucial role in ensuring the smoothness and quality of programs. Their scope of responsibility includes creating and developing ideas for television show production. They can be seen as team leaders, coordinating various production elements and ensuring that the news content delivered is accurate, informative, and engaging. The aim of this research is to identify agenda setting in the news production of the Election program at Nusantara TV. The research method used is qualitative descriptive research, involving data collection through interviews and direct observations at Nusantara TV's office with the producers of the Election program. This research is grounded in agenda setting theory. The findings of this study reveal that breaking news represents a crisis in a program. In dealing with breaking news that needs to be aired, producers are required to align the news broadcast with the media's editorial policies. This can be seen in the selection of sources, the news presenter's perspective, ensuring alignment with the media agenda.
Keywords: Agenda Setting, Television Producers, News Production, Nusantara TV
Vizualization Method for Vapor Film Collapse Mode on Liquid Quenching in Group Processing
Authors: Sugimoto Tsuyoshi 
Published: September 2024

Abstract
The vapor film collapse that occurs in the quenching process is complicated and unstable, these affects the heat treatment quality and its distortion. Particularly in mass production, where production costs are taken into consideration, products are often packaged in group load setting, so it is very important to know the deformation variation and distribution within that process. In order to incorporate it into the MBD technology required these days, it is necessary to predict the quality of heat treatment by CAE, shorten the product development period. However, in the past day, in order to formulate the vapor film collapse on a simulation, it was necessary to perform a very large amount of computational fluid dynamics calculation (CFD), because of a problem in computer resources and the model of vapor film collapse. In addition, this phenomenon has an complexity behavior of the phenomenon in iterative processing in mass production, which also complicates the calculation. The vapor film collapse phenomenon was visualized by using cellular automaton simulation its include the phenomena of “Vapor film thickness”, “Flow disturbance”, “Surface step of workpiece”, “the pressure for vapor film”. In this study, the Markovian property of vapor film surface vibration was clarified, and the heat treatment deformation instability of ring-shaped parts due to it was predicted.
Anisotropy and Metal Structure Characteristics of 3D Metal Printer Materials Due to Carburization
Authors: Goto Syun , Sugimoto Tsuyoshi , Nanko Makoto , Ideta Natsumi 
Published: September 2024

Abstract
Metal additive manufacturing is a molding method with a high degree of freedom because it can be created from high-strength materials using by CAD, etc. In recent years, there is a demand for metal additive manufacturing due to the demand for more complex mechanisms and shape in industrial products. However, the mechanical properties of metal additive manufacturing materials as metallic materials are not clear compared to metallic materials by melting method. In this study, two types of metal additive manufacturing (AM) materials with different lamination directions are carburized and heat treated to clarify the differences from general metallic materials and to clarify the causes. The carburized AM materials were confirmed to have a surface hardness of 550HV and a total carburization depth of 200 μm, but the amount of carburization differed depending on the orientation. In addition, when analyzed with a SEM, a metal structure was formed in an equiaxed crystal shape, and segregation of metal elements was observed.
Tribological Performance of Ni-Based Self-Lubricating Claddings for High Temperature Forming of Lightweight Alloys
Authors: Podgornik Bojan , Šetina-Batič Barbara , Ripoll Manel Rodriguez 
Published: September 2024

Abstract
The aim of the present research work was to investigate tribological performance and potential of Ni-based self-lubricating claddings for high temperature forming of lightweight alloys. Laser claddings included in this investigation were based on Ni-matrix with the incorporation of 5 wt% silver and 10 wt% MoS2 as solid lubricant precursors. Tribological evaluation and testing was performed by Load- Scanner to simulate hot forming process and results compared to high performance hot work tool steel. To simulate hot forming process of forging, wire drawing and extrusion, tests were done at room and elevated temperatures (150°C and 300°C) against typical light-weight alloys, including AISI 316L stainless steel, 6xxx series Al alloy and Ti6Al4V Ti alloy and results evaluated in terms of coefficient of friction vs. load, critical loads for galling initiation and volume of adhered work material. Results show that self-lubricated claddings with incorporated MoS2 and Ag as solid lubricants in general provide lower and more stable friction as well as improved galling resistance in high temperature forming of lightweight alloys. Positive effect of self-lubricating claddings intensifies with forming temperature, degree of plastic deformation and work material tendency to galling.
How to Improve the Performance and Longevity of Induction Tooling Components
Authors: Lynch David 
Published: September 2024

Abstract
This presentation will discuss the most common types of induction tooling failures and the best practices to improve the performance and longevity of inductor coils, bus bars quenches and related tooling. We will discuss the harsh environment of a typical induction machine installation and what can be done to reduce contamination, which is the leading cause of tooling failure. Robust tooling designs and how water cooling is essential to longevity shall be discussed. Cooling water temperature and how the water is presented and routed through the tooling components and the impact this has on performance and longevity shall be discussed. We will discuss the use of proper materials, fittings and hoses which are often overlooked and can be detrimental to a process if not correctly selected. We will cover the induction machine and how it is essential to have a proper earth ground and the importance of proper machine fixturing and alignment. We shall discuss the importance of scheduled machine maintenance, scheduled service and calibration. The presentation will summarize the most common types of failures, how maintenance is essential for longevity and the importance of high-quality robust tooling.