bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aplikasi Sistem Penilaian Kinerja Guru Dengan Metode Decision Tree Menggunakan Algoritma ID3 (Studi Kasus SLTP Negeri 3 Marga Sakti Bengkulu Utara)
Authors: Toyib Rozali , Saputera Surya Ade 
Published: October 2019

Pendidikan adalah usaha sadar dan terencana untuk mewujudkan suasana belajar dan proses pembelajaran agar pendidik dan peserta didik secara aktif mengembangkan potensi dirinya untuk mewujudkan kekuatan spiritual keagamaan, pengendalian diri, kepribadian, kecerdasan, akhlak mulia, serta keterampilan yang diperlukan dirinya dan masyarakat, peranan seorang guru sangatlah penting sebagai salah satu kontrol bagi siswa agar tidak terjerumus kepada pengaruh negative perkembangan penilaian guru dilakukan, pengisian angket secara manual dengan mengisikan penilaian pada lembar kertas dan harus direkapitulasi satu persatu, dengan menggunakan sistem tersebut penilaian kinerja guru akan memakan waktu lama, dan penilaian seperti ini belum memberikan jaminan bahwa penilaian tersebut sudah akurat. Maka dibutuhkan sebuah aplikasi yaitu menggunakan Algoritma ID3, dalam perhitungan algoritma ID3 dibutuhkan 2 rumus utama yaitu entropy dan information gain. fungsi dari entropy yaitu mengukur seberapa baiknya sebuah node dan digunakan sebagai suatu parameter untuk mengukur keberagaman dari kumpulan sampel data, ketika entropy semakin besar, menunjukan bahwa kumpulan data semakin heterogen dan , fungsi gain yaitu mengukur seberapa baik suatu atribut memisahkan training example ke dalam kelas target kemudian Entropy digunakan untuk mendefinisikan nilain information gain yang berguna untuk memilih atribut terbaik dari atribut-atribut yang tersedia. Berdasarkan hasil pengujian diambil kesimpulan : Aplikasi dapat digunakan untuk menentukan kompetensi masing-masing guru pada setiap mata pelajaran, Urutan atribut/ nilai kompetensi masing-masing guru ditentukan berdasarkan nilai Information Gain terbesar, yang telah dihitung menggunakan Algoritma ID-Three
Pengaruh Lingkungan Kampus dan Pembelajaran Kewirausahaan terhadap Keinginan Berwirausaha (Technopreneur) pada Mahasiswa
Authors: Wati Fanny Fatma , Sukmawati Linda , Alamsyah Doni Purnama 
Published: October 2019

Salah satu cara untuk mengatasi pengangguran adalah mendorong pertumbuhan kewirausahaan. Untuk mendorong pertumbuhan kewirausahaan, dan tentunya mengurangi pengangguran terbuka pendidikan Diploma,Sarjana dan Pascasarjana, pihak perguruan tinggi bertanggung jawab dalam mendidik dan memberikan kemampuan berwirausaha serta memberikan motivasi kepada lulusannya agar memilih berwirausaha sebagai karirnya dan memiliki intensi untuk memulai usaha serta memiliki kesiapan dalam hal pengetahuan kewirausahaan. Salah satunya yaitu dengan menambahkan pembelajaran (entrepreneurship) sabagai mata kuliah wajib di setiap programstudi bagi mahasiswa yang bertujuan untuk menumbuhkan pengetahuan bahwa berwirausaha harus memiliki prinsip serta kepercayaan diri yang kuat. Perguruan tinggi berbasis teknologi komputer, pengetahuan tentang enterpreneurship bertujuan untuk menghasilkan lulusan berjiwa wirausaha di bidang informatika yang mampu bersaing secara global, juga mendorong intensi berwirausaha berbasis teknologi (technopreneurship). Metode pengumpulan data yang dilakukan dalam penelitian ini dengan metode survei.Teknik pengambilan sampel dalam penelitian ini adalah purposive sampling. Berdasarkan uji di lingkungan kampus, pembelajaran kewirausahaan dan keinginan wirausaha, data menunjukkan valid dan realibel.
Sistem Pakar Mendiagnosa Penyakit Jantung Dengan Teorema Bayes
Authors: Ningsih Cahaya , Sitio Arjon Samuel , Gea Asaziduhu 
Published: October 2019

Abstrak

Penyakit jantung adalah salah satu penyakit penyebab kematian nomor satu di indonesia. Tingginya jumlah kematian akibat penyakit jantung disebabkan oleh kurangnya ahli jantung, kurangnya kesadaran masyarakat melakukan pengecekan kesehatan jantung secara berkala dan buruknya gaya hidup penderita. Maka dibutuhkan suatu aplikasi yang dapat memudahkan pengguna untuk mendeteksi penyakit jantung secara dini dan mandiri. Dalam penelitian ini, bertujuan untuk membangun aplikasi menggunakan metode Teorema Bayes yang berbasis website sebagai alat bantu untuk mendiagnosa penyakit jantung koroner. Dalam aplikasi ini, pasien tidak harus menunggu lama untuk perawatan oleh dokter, namun dapat menjadi alternative untuk mengantisipasi pengobatan secara cepat dan tepat. Cara menggunakan aplikasi ini yaitu admin menginputkan pertanyaan berupa gejala – gejala yang akan dijawab oleh user, selanjutnya sistem akan mengolah semua jawaban user menggunakan Metode Teorema Bayes dan sistem akan mengeluarkan output berupa hasil diagnosa berupa jenis penyakit jantung dan berbagai solusinya. Aplikasi ini menggunakan bahasa pemograman Web serta Php & Mysql sebagai database. Sistem yang telah dibangun dapat membantu pasien dalam mengetahui jenis penyakit jantung yang sedang diderita pasien dan sesuai analisa pakar penyakit jantung.

Keywords : Penyakit Jantung, Metode Teorema Bayes, Php & Mysql,

Abstract

Heart disease is one of the number one causes of death in Indonesia. The high number of deaths due to heart disease is caused by a lack of cardiologists, lack of awareness of the public to check heart health regularly and poor lifestyles of sufferers. Then we need an application that can make it easier for users to detect heart disease early and independently. In this study, aims to build applications using the Bayes Theorem-based website method as a tool to diagnose coronary heart disease. In this application, patients do not have to wait long for treatment by doctors, but can be an alternative to anticipate treatment quickly and precisely. How to use this application that the admin input questions in the form of symptoms - symptoms that will be answered by the user, then the system will process all user answers using the Bayes Theorem Method and the system will output output in the form of a diagnosis of a type of heart disease and various solutions. This application uses Web programming language and Php&Mysql as database. The system that has been built can help patients in knowing the type of heart disease that the patient is suffering from and according to an expert analysis of heart disease. Keywords: Heart Disease, Bayes Theorem Method, Php&Mysql, Web
IDENTIFIKASI KEMAMPUAN BERPIKIR KRITIS SISWA SMA PADA POKOK BAHASAN OPERASI BENTUK AKAR BERDASARKAN GENDER
Authors: Masruroh Siti , Listiwikono Eko , Yohanes Barep 
Published: October 2019

Kemampuan berpikir kritis pada mata pelajaran matematika sangat penting, tidak hanya untuk mencapai tujuan umum pembelajaran matematika, tetapi juga untuk menciptakan manusia berkualitas yang mampu menciptakan dan menguasai teknologi dimasa depan. Indikator dari berpikir kritis adalah: focus (fokus); reason (alasan); inference (menyimpulkan); situation (situasi); clarity (kejelasan); dan overview (tinjauan ulang).
Penelitian ini berjenis deskriptif kualitatif yang bertujuan untuk menganalisis dan mengidentifikasi kemampuan berpikir kritis siswa dalam menyelesaikan soal operasi bentuk akar. Responden penelitian adalah 17 siswa di SMA Muhammadiyah 4 Songgon kelas X IPA 2. Selanjutnya ditentukan subyek masing-masing 3 berdasarkan gender. Pengumpulan data dilakukan dengan metode tes, wawancara, dan dokumentasi. Wawancara berfungsi sebagai triangulasi data.
Hasil penelitian menunjukkan bahwa siswa perempuan cenderung lebih kritis khususnya dalam memecahkan masalah soal operasi bentuk akar. Siswa perempuan juga lebih benar dan teliti dalam menyelesaikan soal tes. Sedangkan siswa laki-laki benar dalam menyelesaikan soal, namun kurang teliti dalam menyelesaikan soal tes. Akibatnya ada tahapan pengerjaan soal yang terlewatkan.
وسائل وطرق بناء المصطلحات دراسة وصفية تحليلية
Authors: أبوراس محمد امحمد العجيل , الصابري عبد الرحمن بشير 
Published: October 2019

إن المصطلحات هي مفاتيح العلوم وهي مسميات الأشياء التي تتصل بدنيا الواقع لذلك ينبغي أن نوجه نسبة كبيرة من لغتنا التي نستعملها من أجل حمل هذه المصطلحات التي تغزونا ليل نهار نتيجة التطور الفكري والتكنولوجي في العالم؛ والعربية قادرة جدًا على استيعاب كل هذه المفاهيم وجميع هذه المصطلحات بما وهبت من مرونة ومطواعية وليونة لتقبل الفكر الجديد والاختراع الحديث؛ فالنحت والاشتقاق والترادف والمشترك الفظي وغيرها من الوسائل الداخلية للغة كلها تسهم في إيجاد البديل، والمناسب لما يجدّ في عالم الإبداع والاختراع، وينبغي أن تحلّ عقد النّقص في نفوس بعض أبناء اللغة العربية الذين يعتقدون الكمال في لغة الأجنبي وأن العربية لا تستطيع حمل المصطلحات العلمية المعاصرة ونقل التكنولوجيا المتطورة، لقد وسعت العربية في عهد المأمون حضارة الغرب والشرق بفضل سواعد أبنائها وعقول علمائها وإرادة أمرائها.
وقد اهتدى البحث إلى النتائج التالية:
1-	النحت والاشتقاق والمشترك والترادف لها الأثر الكبير في إثراء اللغة العربية بالمصطلحات.
2-	إن وضع المصطلح العلمي يحتكم إلى مبادئ وقواعد اتفق عليها العلماء.
3-	يعد تعدد معاني الكلمات من أهم أسباب نمو اللغة.
4-	تحديد المصطلح وتخصيصه يساعد على حسن الأداء، ويقرب مسافة الفهم، ويجنب اللبس والغموض.
Supporting Student and Preservice Teacher Successes Through Co-teaching
Authors: Barron Tammy Lankford , Pinter Holly Henderson , Winter Kim K. 
Published: October 2019

As increasing inclusion in schools has been emphasized with each reauthorization of the Individuals with Disabilities Education Act amendments, the implementation of co-teaching has increased. Co-teaching has emerged as a supportive framework that uses principles of social justice in building inclusive nurturing environments, yielding positive student outcomes in social as well as academic areas of education. The authors explored the use of co-teaching within a laboratory school setting by analyzing experiences between general education faculty and not only special education faculty but also preservice teachers. Research has found that co-teaching to support preservice and early-career teachers is a natural outgrowth of the special education and general education partnerships created in the co-taught classroom when an intern is placed in such a setting. When used with fidelity, co-teaching is an instructional option that plays an integral part in building effective and efficient ways to foster student learning while enhancing classroom community. Co-teaching can be a powerful mechanism that supports sharing of responsibility and accountability for student achievement, as well as social, emotional, and behavioral growth. A child-centered philosophy was perceived as important to both preservice and co-teachers because of the individual factors that guided practice. With strong leadership from school administrators, commitment and flexibility on the part of classroom teachers, and skills of colleagues, preservice teachers report outstanding growth. Co-teaching, carefully implemented, can foster a nurturing classroom culture and support preservice teachers as they apply knowledge and skills in a constant reflective process, which benefits all teachers and students.
Serendipitous Discovery of PSR J1431-6328 as a Highly Polarized Point Source with the Australian SKA Pathfinder
Authors: Kaplan David L. , Dai Shi , Lenc Emil , Zic Andrew , Swiggum Joseph K. , Murphy Tara , Anderson Craig S. , Cameron Andrew D. , Dobie Dougal , Hobbs George , Kaczmarek Jane F. , Lynch Christene , Toomey Lawrence 
Published: October 2019

Abstract
We identified a highly polarized, steep-spectrum radio source in a deep image with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope at 888 MHz. After considering and rejecting a stellar origin for this source, we discovered a new millisecond pulsar (MSP) using observations from the Parkes radio telescope. This pulsar has period 2.77 ms and dispersion measure 228.27 pc cm−3. Although this pulsar does not yet appear to be particularly remarkable, its short spin period, wide profile, and high dispersion measure make it relatively hard to discover through traditional blind periodicity searches. Over the course of several weeks we see changes in the barycentric period of this pulsar that are consistent with orbital motion in a binary system, but the properties of any binary need to be confirmed by further observations. While even a deep ASKAP survey may not identify large numbers of new MSPs compared with the existing population, it would be competitive with existing all-sky surveys and could discover interesting new MSPs at high Galactic latitude without the need for computationally expensive all-sky periodicity searches.
A Study of Pre-flare Solar Coronal Magnetic Fields: Magnetic Flux Ropes
Authors: Duan Aiying , Jiang Chaowei , He Wen , Feng Xueshang , Zou Peng , Cui Jun 
Published: October 2019

Abstract
Magnetic flux ropes (MFRs) are thought to be the central structures of solar eruptions, and their ideal MHD instabilities can trigger the eruption. Here we performed a study of all the MFR configurations that lead to major solar flares, either eruptive or confined, from 2011 to 2017 near the solar disk center. The coronal magnetic field is reconstructed from observed magnetograms, and based on magnetic twist distribution, we identified the MFR, which is defined as a coherent group of magnetic field lines winding an axis with more than one turn. It is found that 90% of the events possess pre-flare MFRs, and their three-dimensional structures are much more complex in details than theoretical MFR models. We further constructed a diagram based on two parameters, the magnetic twist number which controls the kink instability (KI), and the decay index which controls the torus instability (TI). It clearly shows lower limits for TI and KI thresholds, which are n
crit = 1.3 and

, respectively, as all the events above n
crit and nearly 90% of the events above

erupted. Furthermore, by such criterion, over 70% of the events can be discriminated between eruptive and confined flares, and KI seems to play a nearly equally important role as TI in discriminating between the two types of flares. More than half of the events with both parameters are below the lower limits, and 29% are eruptive. These events might be triggered by magnetic reconnection rather than MHD instabilities.
Probing the Bardeen–Petterson Effect in Tidal Disruption Events with Spectral line Reverberation Mapping
Authors: Zhang Wenda , Yu Wenfei , Karas Vladimír , Dovčiak Michal 
Published: October 2019

Abstract
For an inclined accretion flow around a rotating black hole, the combined effect of the Lense–Thirring precession and viscous torque tends to align the inner part of the flow with the black hole spin, leading to the formation of a warped disk, known as the Bardeen–Petterson (BP) effect. In tidal disruption events (TDEs) in which a supermassive black hole starts to accrete the bound debris, if the black hole is spinning, in general, the stellar orbit is inclined with the black hole spin, as is the accretion disk formed following circularization and radiative cooling of the debris. Xiang-Gruess et al. studied in detail the stellar debris evolution and disk formation in TDEs when the stellar orbit is inclined, and found that a warped disk would form under certain conditions. In this work we investigate properties of a time-resolved fluorescent iron line originating from a warped disk that is irradiated by the initial X-ray flare. We find that the time-resolved spectrum shows distinct features before and after a critical time. This critical time depends on the BP radius r
BP, i.e., the outer boundary of the inner aligned disk, while the line width during the later stage of the X-ray flare is sensitive to the inclination of the outer disk flow. This demonstrates that time-resolved X-ray spectroscopy can be a powerful tool to probe the BP effect in TDE flares and can be used to measure the BP radius as well as put constraints on the black hole mass and spin.
Statistical Analysis of Microvariability Properties of the Blazar S5 0716+714
Authors: Xu Jingran , Hu Shaoming , Webb James R. , Bhatta Gopal , Jiang Yunguo , Chen Xu , Alexeeva Sofya , Li Yutong 
Published: October 2019

Abstract
The typical blazar S5 0716+714 is very interesting due to its rapid and large-amplitude variability and high duty cycle of microvariability in the optical band. We analyze the observations in the I, R, and V bands obtained with the 1.0 m telescope at Weihai observatory of Shandong University from 2011 to 2018. The model of synchrotron radiation from turbulent cells in a jet has been proposed as a mechanism for explaining microvariability seen in blazar light curves. Parameters such as the sizes of turbulent cells, the enhanced particle densities, and the location of the turbulent cells in the jet can be studied using this model. The model predicts a time lag between variations, as observed in different frequency bands. An automatic model fitting method for microvariability is developed, and the fitting results of our multi-frequency microvariability observations support the model. The results show that both the amplitude and duration of flares decomposed from the microvariability light curves conform to the log-normal distribution. The turbulent cell size is within the range of about 5–55 au, and the time lags of the microvariability flares between the I–R and R–V bands should be several minutes. The time lags obtained from the turbulence model are consistent with the fitting statistical results, and the time lags of flares are correlated with the time lags of the whole light curve.
Type IIn Supernova Light Curves Powered by Forward and Reverse Shocks
Authors: Tsuna Daichi , Kashiyama Kazumi , Shigeyama Toshikazu 
Published: October 2019

Abstract
We present a bolometric light-curve model of Type IIn supernovae powered by supernova ejecta colliding with a circumstellar medium. We estimate the conversion efficiency of the ejecta’s kinetic energy to radiation at the reverse and forward shocks and find that a large density contrast makes a difference in the efficiency. The emission from the reverse shock can maintain high efficiency for a long time, and becomes important at the late phase of the light curve. We first construct a semi-analytical model that is applicable to the late phase of the light curve when the diffusion time of photons in the shocked region becomes negligible. We further develop radiation transfer simulations that incorporate these physical processes into the light curve. The numerical calculations predict light curves at early phases, which are testable by present and future short-cadence surveys. We compare our model with the bolometric light curve constructed from observations for a type IIn supernova 2005ip. Due to the reduced efficiency at the forward shock, we find from our model that the mass-loss rate of the progenitor star was

for a wind velocity of 100 km s−1, an order of magnitude higher compared to previous work that used simple assumptions of the efficiency. This highlights the importance of taking these two components into account when extracting the physical parameters from observations.
RELICS: Reionization Lensing Cluster Survey
Authors: Coe Dan , Salmon Brett , Bradač Maruša , Bradley Larry D. , Sharon Keren , Zitrin Adi , Acebron Ana , Cerny Catherine , Cibirka Nathália , Strait Victoria , Paterno-Mahler Rachel , Mahler Guillaume , Avila Roberto J. , Ogaz Sara , Huang Kuang-Han , Pelliccia Debora , Stark Daniel P. , Mainali Ramesh , Oesch Pascal A. , Trenti Michele , Carrasco Daniela , Dawson William A. , Rodney Steven A. , Strolger Louis-Gregory , Riess Adam G. , Jones Christine , Frye Brenda L. , Czakon Nicole G. , Umetsu Keiichi , Vulcani Benedetta , Graur Or , Jha Saurabh W. , Graham Melissa L. , Molino Alberto , Nonino Mario , Hjorth Jens , Selsing Jonatan , Christensen Lise , Kikuchihara Shotaro , Ouchi Masami , Oguri Masamune , Welch Brian , Lemaux Brian C. , Andrade-Santos Felipe , Hoag Austin T. , Johnson Traci L. , Peterson Avery , Past Matthew , Fox Carter , Agulli Irene , Livermore Rachael , Ryan Russell E. , Lam Daniel , Sendra-Server Irene , Toft Sune , Lovisari Lorenzo , Su Yuanyuan 
Published: October 2019

Abstract
Large surveys of galaxy clusters with the Hubble Space Telescope (HST) and Spitzer, including the Cluster Lensing And Supernova survey with Hubble and the Frontier Fields, have demonstrated the power of strong gravitational lensing to efficiently deliver large samples of high-redshift galaxies. We extend this strategy through a wider, shallower survey named RELICS, the Reionization Lensing Cluster Survey, described here. Our 188-orbit Hubble Treasury Program observed 41 clusters at 0.182 ≤ z ≤ 0.972 with Advanced Camera for Surveys (ACS) and WFC3/IR imaging spanning 0.4–1.7 μm. We selected 21 of the most massive clusters known based on Planck PSZ2 estimates and 20 additional clusters based on observed or inferred lensing strength. RELICS observed 46 WFC3/IR pointings (∼200 arcmin2) each with two orbits divided among four filters (F105W, F125W, F140W, and F160W) and ACS imaging as needed to achieve single-orbit depth in each of three filters (F435W, F606W, and F814W). As previously reported by Salmon et al., we discovered over 300 z ∼ 6–10 candidates, including the brightest z ∼ 6 candidates known, and the most distant spatially resolved lensed arc known at z ∼ 10. Spitzer IRAC imaging (945 hr awarded, plus 100 archival, spanning 3.0–5.0 μm) has crucially enabled us to distinguish z ∼ 10 candidates from z ∼ 2 interlopers. For each cluster, two HST observing epochs were staggered by about a month, enabling us to discover 11 supernovae, including 3 lensed supernovae, which we followed up with 20 orbits from our program. Reduced HST images, catalogs, and lens models are available on MAST, and reduced Spitzer images are available on IRSA.
A Momentum-conserving Accretion Disk Wind in the Narrow-line Seyfert 1 I Zwicky 1
Authors: Reeves J. N. , Braito V. 
Published: October 2019

Abstract
I Zwicky 1 (hereafter I Zw 1) is the prototype optical narrow-line Seyfert 1 galaxy. It is also a nearby (z = 0.0611), luminous quasi-stellar object (QSO), accreting close to the Eddington limit. XMM-Newton observations of I Zw 1 in 2015 reveal the presence of a broad and blueshifted P Cygni iron K profile, as observed through a blueshifted absorption trough at 9 keV and a broad excess of emission at 7 keV in the X-ray spectra. The profile can be well fitted with a wide-angle accretion disk wind, with an outflow velocity of at least −0.25c. In this respect, I Zw 1 may be analogous to the prototype fast wind detected in the QSO PDS 456, while its overall mass outflow rate is scaled down by a factor of 50, due to its lower black hole mass. The mechanical power of the fast wind in I Zw 1 is constrained to within 5%–15% of Eddington, while its momentum rate is of the order unity. Upper limits placed on the energetics of any molecular outflow, from its CO profile measured by IRAM, appear to rule out the presence of a powerful, large-scale, energy-conserving wind in this active galactic nucleus (AGN). We consider whether I Zw 1 may be similar to a number of other AGNs, such as PDS 456, where the large-scale galactic outflow is much weaker than what is anticipated from models of energy-conserving feedback.