bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analisis Miskonsepsi Peserta Didik Tentang Getaran dan Gelombang Menggunakan Four-Tier Diagnostic Test ditinjau dari Jenis Kelamin
Authors: Kurniasih Kurniasih , Djudin Tomo , Hamdani Hamdani 
Published: June 2023

Tujuan penelitian ini untuk melihat apakah jenis kelamin berpengaruh pada miskonsepsi siswa di kelas VIII SMP Negeri 18 Pontianak tentang getaran dan gelombang. Metode yang digunakan pada penelitian ini yaitu deskriptif kuantitatif. Pelaksanaan penelitian ini di SMP Negeri 18 Pontianak. Sampel yang digunakan sebanyak 126 orang terdiri dari 50 orang siswa laki-laki dan 76 orang siswa perempuan. Teknik pengumpulan data dilakukan dengan pemberian tes four tier diagnostic test kepada siswa kelas VIII. Hasil penelitian menunjukkan bahwa persentase rata-rata siswa laki-laki yang mengalami miskonsepsi sebesar 12,85% dan persentase rata-rata siswa perempuan yang mengalami miskonsepi sebesar 17,75% dan termasuk dalam kategori rendah. Bentuk miskonsepsi siswa pada materi getaran dan gelombang yaitu ; 1) keliru dalam mendefinisikan getaran, 2) menganggap periode dan frekuensi getaran dipengaruhi oleh massa bandul, 3) beranggapan bahwa gaya pegas searah dengan arah simpangannya, 4) menganggap dalam perambatannya gelombang memindahkan materi sehingga partikel mediumnya terdorong ke segala arah dari sumber gelombang, 5) keliru dalam mendefinisikan gelombang transversal dan gelombang longitudinal, 6) beranggapan bahwa makin panjang tali bandul maka periode getaran bandul makin kecil dan frekuensi bandul makin besar. Dengan menggunakan uji proporsi dua pihak, dan derajat signifikansi yang digunakan Î± = 0,05 = 5%, dengan syarat yaitu apabila nilai -Z tabel < Z hitung < Z tabel, H0 diterima. Diperoleh Z hitung (2,033) lebih besar dari nilai Z tabel (1,96) dan -Z tabel (-1,96) serta terletak diluar daerah penerimaan H0, dapat disimpulkan terdapat perbedaan persentase miskonsepsi antara siswa laki-laki dan perempuan.
Increasing the efficiency of slotting deep fir trees in gas turbine discs made of heat-resistant alloys by applying a combined method of hydroabrasive treatment and broaching
Authors: Makarov Vladimir , Pesin Mihail , Volkov Makism 
Published: June 2023

The efficiency of the application of a new technology for fir-tree slots treatment in turbine discs based on a combination of pre-slotting operations of the «house» by hydro-abrasive treatment (HAT) and final broaching of the herringbone on a CNC machine in comparison with milling, deep grinding and EDM-ing methods is viewed. Problems arising within manufacturing and operating of broaches often cause down-time of both types: main and tool production. At the same time, the set high growth rates of production of gas turbine engines are inevitably restrained, the costs of manufacturing sets of multi-section fir-tree broaches are significantly increasing. To solve the problem, various combined processing techniques are proposed for the application, i.e., the pre-slotting of the «house» of broaches is carried out by various productive cutting methods such as deep grinding, milling, EDM-ing and HAT, while finishing is carried out using finishing profile broaching tech-nique. The pre-liminary calculations of labor intensity and production costs carried out during comparative tests of various combined variants of pre-slotting have proved the advantages of HAT cutting.
As a result of the experimental studies, conducted on slotting, using HAT technique with subsequent broaching under final form broach, it was found that channel profile of the preliminary slot with allowances, made for measured profile devi-ation, is in the tolerable limit before final shape of the final broaching, which bears evidence of the slot appropriateness made by HAT method and its readiness for final broaching. After herringbone final broaching an electronic control was conducted and it was found that all the main dimensions in the herringbones are within tolerance limits and are suitable according to technic specifications. It is proposed to carry out further experimental work on particular stock-produced tur-bine disks for making a decision on the introduction of a new technology into mass production.
Eksplorasi Etnomatematika Pada Permainan Tradisional Kelereng Di Kelurahan Bahagia, Babelan, Bekasi
Authors: Huri Suhendri  , Ningsih Rita 
Published: June 2023

Abstract :
This study aims to identify and describe ethnomathematics in the traditional game of marbles in the Happy Village, Babelan District, Bekasi Regency, West Java. The research method used is ethnomathematics with the object of research being the traditional game of marbles. The data sources in this study consisted of: the research object, namely marbles games, sources, namely 3 elders, and related documents discussing marbles games. Data collection techniques are carried out through: observation, interviews, and documentation. Based on the research results obtained and data analysis, it is concluded that there are mathematical concepts in the game of marbles, namely: the concept of geometric shapes in the shape of marbles, the concept of flat geometry and trigonometry in the shape of the game area of ​​marbles, and the concept of opportunity and integer arithmetic operations in the implementation marble game..
Keywords: Ethnomatematics, Traditional Games, Marbles, Babelan Village.
Kecemasan Matematika Siswa Ditinjau Dari Hasil Belajar
Authors: Nugroho Danu , Untu Zainuddin , Samsuddin Auliaul Fitrah 
Published: June 2023

Abstract
Mathematics is a subject that is quite difficult for students. Many students feel anxious when faced with math problems. The purpose of this study was to determine the level of math anxiety possessed by students based on their learning outcomes. This research is a descriptive qualitative research with 62 junior high school students representing each category of anxiety as subjects. Data collection techniques in this study include observation, questionnaires, interviews, and tests. The results of the study show that the math anxiety experienced by students in solving flat-sided geometrical problems consists of 4 levels of anxiety, namely the category of no anxiety as many as 8 students or 13%, the category of mild anxiety as many as 34 students or 55%, the category of moderate anxiety as many as 18 students or 29%, severe anxiety category as many as 2 students or 3%. Overall, students’ mathematical anxiety in solving problems on solid shapes topi was in low category with the average score of test result is 38,18 which is in opor category.

Keywords: Learning Outcome, Mathematics Anxiety
Overcoming Barriers to Magnesium Rolling
Authors: Javaid Amjad , Kozdras Mark S. , Czerwinski Frank 
Published: June 2023

Abstract
The key obstacle to industrial scale magnesium rolling is the element’s inherently poor formability at room temperature. To address this challenge, the search is on for new magnesium alloys that feature improved formability along with novel rolling techniques. This article describes R&D activities at CanmetMaterials aimed at expanding manufacturing capabilities of magnesium-based sheet materials for future applications in transport vehicles.
A Noncomprehensive Guide to Nondestructive Evaluation
Authors: Glass Samuel W. 
Published: June 2023

Abstract
Nondestructive evaluation comprises a large family of specific test disciplines including visual inspection, dimensional metrology, ultrasound, radiography, penetrant tests, magnetic particle tests, leak tests, eddy current tests, potential drop tests, flash and vibrothermography, shearography, acoustic emissions, and many other methods. This article offers an overview of NDE science and discusses some key considerations for choosing specific techniques.
Extracting Rare Earth Elements from Coal-Based Materials
Authors: Alvin Mary Anne 
Published: June 2023

Abstract
Rising concern among industrialized nations has driven a resurgence of global interest in rare earth element mineral exploration and extraction as well as related research on supply, demand, utilization, recycling, reuse, and substitution. This article describes a program with the aim to develop an economically competitive and sustainable domestic U.S. supply of rare earth elements (REEs). The work to date has demonstrated the technical feasibility of extracting REEs from coal-based materials.
PENGARUH KECERDASAN EMOSIONAL DAN SIKAP SISWA PADA MATA PELAJARAN MATEMATIKA TERHADAP HASIL BELAJAR MATEMATIKA SISWA KELAS VIII MTs DDI BARUGA
Authors: Rahmawati Atika , Amaliyah AR Rezki , Muliana M Ana 
Published: June 2023

Penelitian ini bertujuan untuk mengetahui pengaruh kecerdasan emosional dan sikap siswa pada mata pelajaran matematika terhadap hasil belajar matematika siswa kelas VIII MTs DDI Baruga. Jenis penelitian yang digunakan yaitu ex-post facto dengan sampel penelitian sebanyak 60 siswa dari populasi kelas VIII MTs DDI Baruga, yang dipilih dengan teknik simple random sampling. Teknik pengumpulan data menggunakan instrumen: (1) angket kecerdasan emosional, (2) angket sikap siswa pada mata pelajaran matematika, dan (3) tes hasil belajar matematika. Analisis data menggunakan statistik deskriptif dan inferensial dengan uji prasyarat yaitu uji normalitas, linearitas, heteroskedastisitas dan multikolinearitas. Uji hipotesis menggunakan uji T, uji F, analisis regresi linear sederhana dan analisis regresi linear berganda. Hasil pengujian statistik deskriptif menunjukkan bahwa: (1) kecerdasan emosional siswa berada pada kategori kurang, (2) sikap siswa pada mata pelajaran matematika berada pada kategori sedang, dan (3) hasil belajar matematika siswa berada pada kategori cukup. Hasil uji hipotesis menunjukkan bahwa: (1) tidak terdapat pengaruh yang positif dan signifikan kecerdasan emosional terhadap hasil belajar matematika siswa, (2) terdapat pengaruh yang positif dan signifikan sikap siswa pada mata pelajaran matematika terhadap hasil belajar matematika siswa, dan (3) terdapat pengaruh yang positif dan signifikan kecerdasan emosional dan sikap siswa pada mata pelajaran matematika secara bersama-sama terhadap hasil belajar matematika siswa.
Vasospasm following brain tumor resection in children: institutional experience and systematic review
Authors: Bokhari Rakan , Elkaim Lior M. , Shlobin Nathan A. , Alotaibi Naif M. , Sabbagh Abdulrahman J. , Weil Alexander G. , Baeesa Saleh , Dudley Roy W. R. , Atkinson Jeffrey , Farmer Jean-Pierre 
Published: June 2023

OBJECTIVE
Delayed cerebral ischemia (DCI) associated with vasospasm is well described in the setting of aneurysmal subarachnoid hemorrhage (SAH). In addition, DCI is very infrequently encountered in patients who have undergone resection of a brain tumor with unclear pathophysiology. The occurrence of DCI in the pediatric population is exceedingly rare, and outcomes in this population have, to the authors’ knowledge, never been systematically reviewed. Therefore, the authors present what is to their knowledge the largest series of pediatric patients with this complication and systematically reviewed the literature for individual participant data.

METHODS
The authors conducted a retrospective review of 172 sellar and suprasellar tumors in pediatric patients who underwent surgery at the Montreal Children’s Hospital between 1999 and 2017 to identify cases of vasospasm occurring after tumor resection. Descriptive statistics, including patient characteristics, intraoperative and postoperative findings, and outcome status, were collected. A systematic review was also conducted using three databases (PubMed, Web of Science, Embase) to identify reported cases available in the literature of vasospasm after tumor resection in children and collect individual participant data on these patients for further analysis.

RESULTS
Six patients treated at Montreal Children’s Hospital were identified, with an average age of 9.5 years (range 6–15 years). The prevalence of vasospasm after tumor resection was 3.5% (6/172). Vasospasm in all 6 patients occurred after craniotomy was performed to treat a suprasellar tumor. The average interval from surgery to symptoms was 3.25 days (range 12 hours–10 days). The most common tumor etiology was craniopharyngioma, seen in 4 cases. Extensive tumor encasement of blood vessels requiring significant operative manipulation was described in all 6 patients. A rapid decrease in serum sodium (exceeding 12 mEq/L/24 hrs or below 135 mEq/L) was seen in 4 patients. On final follow-up, 3 patients were left with significant disability, and all patients had persistent deficits. A systematic review of the literature revealed a total of 10 other patients whose characteristics and treatment were compared with those of the 6 patients treated at Montreal Children’s Hospital.

CONCLUSIONS
Vasospasm after tumor resection in children and youth is likely a rare entity, with a prevalence of 3.5% in this case series. Suprasellar tumor location (particularly craniopharyngioma tumor etiology), significant encasement of blood vessels by the tumor, and postoperative hyponatremia may be predictive factors. Outcome is poor, with most patients having significant persistent neurological deficits.
Subependymal giant-cell astrocytomas in the absence of tuberous sclerosis
Authors: Reynolds Rebecca A. , Aum Diane J. , Gonzalez-Gomez Ignacio , Wong Michael , Roberts Kaleigh , Dahiya Sonika , Rodriguez Luis F. , Roland Jarod L. , Smyth Matthew D. 
Published: June 2023

OBJECTIVE
Tuberous sclerosis is a rare genetic condition caused by TSC1 or TSC2 mutations that can be inherited, sporadic, or the result of somatic mosaicism. Subependymal giant-cell astrocytoma (SEGA) is a major diagnostic feature of tuberous sclerosis complex (TSC). This study aimed to present a series of cases in which a pathological diagnosis of SEGA was not diagnostic of tuberous sclerosis.

METHODS
The authors retrospectively reviewed a clinical case series of 5 children who presented with a SEGA tumor to Johns Hopkins All Children’s Hospital and St. Louis Children’s Hospital between 2010 and 2022 and whose initial genetic workup was negative for tuberous sclerosis. All patients were treated with craniotomy for SEGA resection. TSC genetic testing was performed on all SEGA specimens.

RESULTS
The children underwent open frontal craniotomy for SEGA resection from the ages of 10 months to 14 years. All cases demonstrated the classic imaging features of SEGA. Four were centered at the foramen of Monro and 1 in the occipital horn. One patient presented with hydrocephalus, 1 with headaches, 1 with hand weakness, 1 with seizures, and 1 with tumor hemorrhage. Somatic TSC1 mutation was present in the SEGA tumors of 2 patients and TSC2 mutation in 1 patient. Germline TSC mutation testing was negative for all 5 cases. No patient had other systemic findings of tuberous sclerosis on ophthalmological, dermatological, neurological, renal, or cardiopulmonary assessments and thus did not meet the clinical criteria for tuberous sclerosis. The average follow-up was 6.7 years. Recurrence was noted in 2 cases, in which 1 patient underwent radiosurgery and 1 was started on a mammalian target of rapamycin (mTOR) inhibitor (rapamycin).

CONCLUSIONS
There may be intracranial implications of somatic mosaicism associated with tuberous sclerosis. Children who are diagnosed with SEGA do not necessarily have a diagnosis of tuberous sclerosis. Tumors may carry a TSC1 or TSC2 mutation, but germline testing can be negative. These children should continue to be followed with serial cranial imaging for tumor progression, but they may not require the same long-term monitoring as patients who are diagnosed with germline TSC1 or TSC2 mutations.
IMPLEMENTASI DAN DAMPAK E LITIGASI DALAM PERSPEKTIF HUKUM ACARA PERDATA DIHUBUNGKAN DENGAN PERATURAN MAHKAMAH AGUNG NOMOR 1 TAHUN 2019
Authors: Nuraeni Yeni , Pratama Firman 
Published: June 2023

The development of the era in the Revolution 4.0 era where there was a leap of progress towards digital, the world of justice was also required to follow the developments of the era, coupled with the occurrence of the COVID-19 pandemic which required people to avoid direct interaction. Electronic Judiciary or E-Litigation is a solution for all which is a form of implementation of the legal principle of costante justitie (quick trial and low cost) and it is hoped that this E-Litigation can penetrate the barrier to the effectiveness of the judiciary and is expected to overcome geographical constraints and reduce the high cost of litigation. and become a solution during a pandemic. This study aims to find out how the implementation of E-Litigation in the Majalengka District Court is based on supporting theories and Supreme Court Regulation (PERMA) 1 of 2019, and the Civil Procedure Code, and what impacts occur after the implementation of E-Litigation.
The method used in this study is descriptive analysis by analyzing existing regulations regarding E-Litigation and their application in the field, with a normative juridical approach, which basically uses the rules in the applicable legal provisions such as the articles in the legislation. invitation and expert opinion (doctrine),
The results of this study indicate that most of the implementation of E-Litigation in the Majalengka District Court is in accordance with the existing PERMA, but if you look at the Civil Procedure Code there are many differences and contradictions in it which are one of the obstacles and also the lack of public knowledge about the procedures. trial with this E-Litigation system. However, the Majalengka District Court continues to actively carry out socialization not only to the general public but also to other legal practitioners.
STRATEGI PENANGANAN ANAK TIDAK SEKOLAH DI KABUPATEN SRAGEN
Authors: Noviani Leny , Budiarti Atik Catur , Tuhana Tuhana , Setyawati Martani 
Published: June 2023

Permasalahan Anak Tidak Sekolah (ATS) di Kabupaten Sragen termasuk tinggi di Jawa Tengah yaitu 9.398 anak. Permasalahan ATS berdampak pada kualitas sumber daya manusia dan akan mempengaruhi daya saing daerah. Tujuan penelitian ini adalah: mengidentifikasi faktor penyebab ATS dan memberikan alternatif solusi penanganan ATS. Penelitian ini merupakan penelitian deskriptif. Populasi dalam penelitian ini adalah anak usia 7-18 tahun yang: tidak pernah sekolah maupun anak putus sekolah. Sampel dalam penelitian ini adalah 1.143 responden. Teknik pengumpulan data menggunakan survey, Focus Group Discussion, dan studi pustaka. Teknik analisis data menggunakan: 1) analisis deskriptif kuantitatif untuk mengidentifikasi faktor penyebab ATS, dan 2) analisis data kualitatif untuk menganalisis hasil FGD. Hasil penelitian menunjukkan faktor penyebab ATS antara lain: motivasi kurang, kemampuan ekonomi kurang, sudah bekerja atau ingin bekerja, disabilitas, permasalahan keluarga seperti akibat perceraian orang tua dan anak yatim piatu, korban bulliying, menikah pada usia muda atau melahirkan anak, dan kemampuan kognitif siswa rendah. Strategi dalam menangani ATS: 1) strategi pencegahan untuk memantau anak yang rentan atau memiliki resiko putus sekolah, dan 2) strategi intervensi dilakukan berdasarkan faktor penyebab ATS. Strategi intervensi bertujuan mengembalikan dan mendampingi ATS ke sekolah atau pelatihan yang sesuai. Strategi intervensi ini bersifat multisektoral.
APAKAH MERANTAU SOLUSI TERBAIK BAGI PENGANGGURAN MUDA? (ANALISIS PENGARUH MIGRASI SEUMUR HIDUP DAN MIGRASI RISEN TERHADAP STATUS NOT IN EMPLOYMENT, EDUCATION OR TRAINING DI INDONESIA)
Authors: Deva Sabrina  
Published: June 2023

Penduduk muda merupakan penduduk yang paling mungkin melakukan migrasi, apalagi didukung dengan akses informasi yang tidak terbatas seperti era 4.0 sekarang. Akan tetapi apakah migrasi, atau dalam istilah yang kita kenal “Merantau” ini efektif dalam hal mengurangi risiko mereka menjadi pemuda luntang-lantung? Penelitian ini berupaya untuk menjawab pertanyaan ini dengan melihat pengaruh migrasi (migrasi seumur hidup dan migrasi risen) pada status NEET (Not in Employment, Education, or Training) serta melihat pengaruh karakteristik demografi (jenis kelamin, umur, pendidikan, status perkawinan, status disabilitas, dan klasifikasi daerah tempat tinggal) terhadap NEET pada penduduk muda (usia 15-24 tahun) di Indonesia. Dengan menggunakan data BPS, Sakernas 2021, yang diolah menggunakan metode analisis regresi logistik biner, diperoleh hasil bahwa migrasi seumur hidup dan risen, serta semua karakteristik demografi yang digunakan (jenis kelamin, umur, pendidikan, status perkawinan, status disabilitas, dan klasifikasi daerah tempat tinggal) berpengaruh signifikan terhadap status NEET. Terdapat perbedaan efek risiko menjadi NEET antara migran seumur hidup dengan migran risen. Migran seumur hidup memiliki kecenderungan yang lebih kecil menjadi NEET. Sebaliknya migran risen memiliki risiko yang lebih besar menjadi NEET dibandingkan non migran risen. Hasil penelitian ini penting dalam memberikan gambaran risiko yang dihadapi pemuda apabila memutuskan melakukan migrasi.
Virtual reality application of an enclosed tank as a teaching module for automatic control
Authors: Cando Sangoquiza César Darío , Morales Chicaiza Willian David , Mullo Mullo Edison Guillermo , Mañay Chochos Edison David 
Published: June 2023

In the field of engineering, Virtual Reality (VR) has emerged as a training option for students to generate practical skills in automatic process control. The article presents a VR application of a closed tank, which allows the introduction of control strategies for the pressure variable, using a microcontroller and a computer. The VR interface was implemented in Unity with the three-dimensional design of the plant shown to the user on the computer monitor, the mathematical model that characterizes the dynamic behavior of the process and the PID control strategy was established in the Arduino Uno module. Communication between the Arduino and the PC was established via RS-232 protocol. The VR environment consists of a panel for the selection and serial connection with the Arduino, also with inputs that allows to evaluate the control strategy as the SetPoint (SP) and the manual valve (a2), which is the actuator to introduce disturbance to the model. With the SP entered to the control system with perturbations of 20, 60 and 90%, the PID control performed well with minimal steady state errors. The dynamic behavior of the process is visualized in the VR environment with the movement of the control valve stem (a1), the process variable (PV) is displayed on the PIT 100-A transmitter and the trends of the variables (SP, PV and CV). The proposal can be replicated to other processes and different variables such as level, flow, etc.