bluuebunny/crossref_metadata_2025_split huggingface dataset:
PEMODELAN MATEMATIKA ALIRAN DARAH PADA PEMBULUH DARAH ARTERI DAN VENA PADA KELAINAN JANTUNG SINGLE VENTRICLE
Authors: Pradina Mutia Aris 
Published: February 2021

Single ventricle is a heart defect in which one of the ventricle does not developed and bother the blood flow. One of the solutions is fontan surgery. The result of Fontan surgery allows the blood flowing in veins that initially lead to the heart change into the arteries. Because of these changes, there are possibility of swelling and velocity change of blood flowing. This research constructed a mathematical model of blood flowing velocity in arteries and veins due to a single ventricle heart defect that was formed from the momentum and mass equation, which was influenced by the diameter of venous vessel and blood viscosity. The analysis of the blood flow velocity in arteries and veins due to single ventricle heart defect was simulated by MATLAB and FLUENT software. The factors observed were the effect of venous diameter and blood viscosity on the velocity of blood flow in the veins. The result indicated that the greater diameter of the vein, the smaller the flow velocity in the vein. The greater blood viscosity resulted the smaller flow velocity in arteries and veins.
PENERAPAN PENDEKATAN KONTEKSTUAL PADA PEMBELAJARAN MATEMATIKA UNTUK MENINGKATKAN PRESTASI SISWA SMP
Authors: Santoso Kusnan Budi 
Published: February 2021

Penelitian ini bertujuan untuk meningkatkan prestasi belajar matematika melalui pendekatan kontekstual siswa kelas VIII SMPN 1 Hatungun Kabupaten Tapin. Jenis penelitian yang dilakukan adalah Penelitian Tindakan kelas dengan dua siklus. Subjek penelitian ini adalah siswa kelas VIII SMPN 1 Hatungun Kabupaten Tapin sebanyak 17 orang yang terdiri atas sepuluh orang laki-laki dan tujuh orang perempuan. Teknik pengumpulan data yang digunakan yaitu tes dan dokumentasi serta hasilnya dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa adanya peningkatan hasil belajar siswa dari siklus I ke siklus II. Hasil lain menunjukkan bahwa aktivitas siswa dalam proses pembelajaran dan aktivitas guru dalam pengelolaan pembelajaran juga kategori baik. Kata kunci: pendekatan kontekstual, prestasi belajar, matematika. Abstract: This study aims to improve mathematics learning achievement through the contextual approach of eight grade students of SMPN 1 Hatungun, Tapin Regency. This type of research is a classroom action research with two cycles. The subjects of this study were 17 students, consisting of ten boys and seven girls. The data collection techniques used were tests and documentation and the results were analyzed descriptively. The results showed that there was an increase in student learning outcomes from cycle I to cycle II. Other results indicate that student activities in the learning process and teacher activities in learning management are also in good category. Keywords: contextual approach, learning achievement, mathematics.
Pengaruh Biochar Tandan Kosong Kelapa Sawit dan Mikoriza Arbuskular terhadap Pertumbuhan Tanaman Cabai Hiyung (Capsicum Frustescens L.) pada Tanah Ultisol
Authors: Saputri Bella , Sofyan Antar , Wahdah Rabiatul 
Published: February 2021

Cabai rawit (Capsicum frutescent L.) merupakan salah satu komoditi hortikultura yang memiliki nilai ekonomis untuk dikembangkan dalam usaha tani. Cabai hiyung merupakan cabai rawit lokal dari desa Hiyung Kecamatan Tapin Tengah Kabupaten Tapin, Provinsi Kalimantan Selatan. Cabai hiyung memiliki tingkat kepedasan yang tinggi dengan kadar capcaisin yang mencapai 94.500 ppm. Tanah ultisol memiliki pH rendah (masam) berkisar antara 4,5-5,3 menyebabkan Al, Fe, Mn tinggi, fiksasi P dan aktivitas mikroba serta kandungan bahan organik (K, Ca, Mg, dan Cu) rendah, bahan organik mudah tererosi, flora fauna yang menguntungkan tidak aktif. Salah satu upaya dalam mengurangi kendala budidaya pada tanah utisol ini adalah dengan menggunakan biochar tandan kosong kelapa sawit dan mikoriza arbuskular. Penelitian ini bertujuan untuk mengetahui pengaruh interaksi biochar TKKS dan mikoriza arbusular yang diaplikasikan di pertanaman cabai hiyung terhadap pertumbuhan tanaman cabai hiyung pada tanah ultisol. Penelitian ini dilaksanakan di lahan percobaan Agroekoteknologi Fakultas Pertanian Universitas Lambung Mangkurat Banjarbaru. Penelitian menggunakan metode Rancangan Acak Lengkap (RAL) dua faktor dengan masing masing empat perlakuan yaitu, mikoriza (M) M0 : kontrol, M1 : 20 g/polybag, M2 : 40 g/polybag, M3 : 60 g/polybag. Biochar (B) B0 : kontrol, B1 : 150 g/polybag, B2 : 300 g/polybag, B3 : 450 g/polybag. Hasil penelitian menunjukkan bahwa pemberian biochar TKKS dan mikoriza arbuskular berpengaruh nyata terhadap tinggi tanaman dan jumlah bunga pertama, akan tetapi tidak berpengaruh nyata terhadap panjang akar dan volume akar tanaman cabai hiyung, Perlakuan terbaik adalah perlakuan M1B1 yaitu 20 g/polybag Mikoriza dan 150 g/polybag Biochar tandankosong kelapa sawit.
Skarifikasi Awal Dan Penambahan Beberapa Jenis Zat Pengatur Tumbuh Untuk Percepatan Perkecambahan Benih Kayu Kuku (Pericopsis moonianna Thw)
Authors: Romdyah Neneng Laila , Riniarti Melya , Asmarahman Ceng , Yuwono Slamet Budi 
Published: February 2021

Scarification was the destruction of the seed coat to softening seed coat and became permeable to water and gas. The purpose of this study was to obtain the best scarification techniques, types of growth regulatory substances and the combination of scarification treatments and addition of growth regulatory substances to accelerate the germination of Pericopsis mooniana seeds. The study was conducted using factorial randomized block design with three replications. The first factor was the scarification technique, with hot water, and broken the seed skin. The second factor was the addition of growth regulatory substances (coconut water and, bamboo shoots) shoot water and artificial growth regulatory substances Dates analyzed with variance and continued with the tukey test at 5% level. The results showed that the scarification technique by broken seed skin significant differences in the percentage of sprouts, germination, average days of germination, vigor index, number of leaves, and seedling height. The addition of growth regulatory substances did not show a significant difference in all observed variables.
ANALISIS JARINGAN GSM 1800 MHZ PADA SEKTOR YANG MENGGUNAKAN FREQUENCY REUSE TERHADAP KUALITAS PELAYANAN BTS DKI JAKARTA DI PT. TELKOMSEL INDONESIA, TBK.
Authors: Ariska Cahya  , Wisnu Djatmiko  , Aodah Diamah  
Published: February 2021

Abstrak- Tujuan dari penelitian ini adalah mencari hubungan antara Co – Channel Interference pada konsep Frequency Reuse terhadap kualitas pelayanan BTS DKI Jakarta.Penelitian ini menggunakan metode kuantitatif dimana data diolah dengan menggunakan korelasi product momment dengan bantuan microsoft excell. Penelitian ini menggunakan data sekunder yang bersumber dari PT, Telkomsel, tbk. yang diambil dengan metode drive test. Sampel yang diambil berjumlah 7 tempat di DKI Jakarta. Data yang diambil merupakan data dari nilai Carrier to Interference (C/I), juga nilai Rx Level dan jarak antara sel asli dan sel co – channel.Hasil penelitian ini menunjukkan bahwa nilai Rx Level berpengaruh terhadap nilai Carrier To Interference. Dimana Peneliti menggunakan Carrier To Interference. Dimana peneliti menggunakan Carrier To Interference untuk melihat kualitas dari pelayanan jaringan GSM 1800 MHz dan menggunakan Rx Level sebagai parameternya.
Kata kunci : Co – Channel Interference, Frequency Reuse, GSM 1800 MHz, Carrier To Interference, Rx Level.

Abstract - The purpose of this research is to find a relationship between the Co - Channel Interference in Frequency Reuse concept of service quality BTS Jakarta.This research uses quantitative method where data is processed by using product moment correlation with the help of microsoft excell. This study uses secondary data sourced from PT, Telkomsel, tbk. captured with drive test method. The sample is 7 places in DKI Jakarta. The data taken is data from Carrier to Interference (C / I) value, also Rx Level and distance between original cell and co-channel cell.The results of this study indicate that the value of Rx Level effect on the value of Carrier To Interference. Where Researchers use Carrier To Interference. Where the researcher uses Carrier To Interference to see the quality of GSM 1800 MHz network service and use Rx Level as its parameter.
Keywords: Co - Channel Interference, Frequency Reuse, GSM 1800 MHz, Carrier To Interference, Rx Level
PERBANDINGAN MODEL PROBLEM BASED LEARNING DENGAN INQUIRY LEARNING TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN JARINGAN DASAR KELAS X TKJ SMK DINAMIKA PEMBANGUNAN 1 JAKARTA
Authors: Fissa Bella  , Yuliatri Sastrawijaya  , Vina Oktaviani  
Published: February 2021

Penelitian ini bertujuan untuk mengetahui perbandingan model Problem Based Learning dengan model Inquiry Learning terhadap hasil belajar siswa pada mata pelajaran Jaringan Dasar kelas X TKJ di SMK Dinamika Pembangunan 1 Jakarta. Model Problem Based Learning diterapkan di kelas eksperimen yaitu kelas X TKJ 1 dan model pembelajaran Inquiry Learning diterapkan di kelas kontrol yaitu kelas X TKJ 3. Dalam penelitian ini metode yang digunakan adalah metode eksperimen kuantitatif, yaitu dengan memperlakukan dua kelas dengan perlakuan atau tindakan yang berbeda. Untuk mendapatkan data dari penelitian ini dilakukan cara menguji siswa dengan memberikan tes akhir (posttest) untuk mengukur kemampuan kognitif dengan tes pilihan ganda. Berdasarkan hasil penelitian dapat disimpulkan bahwa terdapat perbedaan hasil belajar antara model Problem Based Learning dengan model Inquiry Learning pada mata pelajaran Jaringan Dasar Kelas X TKJ di SMK Dinamika Pembangunan 1 Jakarta yang dibuktikan dengan hasil analisis data (uji-t) yaitu diperoleh nilai thitung = 2,270 dan ttabel = 2,03. Karena thitung > ttabel yaitu 2,270 > 2,03, maka dapat dikatakan bahwa H0 ditolak. Hasil belajar siswa yang diterapkan dengan model Problem Based Learning mendapatkan nilai rata-rata sebesar 85,228, sedangkan siswa yang diterapkan dengan model Inquiry Learning mendapatkan nilai rata-rata sebesar 82,919. Hal ini membuktikan bahwa siswa yang diajarkan menggunakan model Problem Based Learning memiliki nilai rata-rata yang lebih tinggi dibandingkan dengan siswa yang diajarkan dengan menggunakan model Inquiry Learning.
PERBANDINGAN JACCARD SIMILARITY DENGAN EXTENDED JACCARD SIMILARITY PADA PENALARAN BERBASIS KASUS
Authors: Murien Nugraheni  
Published: February 2021

Penalaran berbasis kasus memberikan solusi pada suatu kasus baru dengan menggunakan pengetahuan lalu yang tersimpan pada basis pengetahuan. Dilakukan perhitungan kasus baru dengan menggunakan sampel gejala yang akan didiagnosa dengan kasus lama yang telah tersimpan pada basis data. Kasus lama dengan nilai similaritas tertinggi akan diambil dan kemudian solusi dari kasus lama tersebut akan dijadikan solusi bagi kasus yang baru. Jika suatu kasus tidak berhasil didiagnosa, maka kasus tersebut akan dilakukan revisi oleh seorang pakar. Kasus yang berhasil direvisi akan disimpan ke dalam basis data untuk dijadikan pengetahuan baru.
Pada penelitian ini dilakukan dua perbandingan metode untuk menghitung tingkat kemiripan antara kasus baru dengan kasus lama. Metode similarity yang digunakan adalah metode Jaccard Similarity dan Extended Jaccard Similarity. Hasil dari penelitian ini diperoleh bahwa metode Extended Jaccard Similarity mempunyai tingkat kemiripan sebesar 52.6818% sedangkan metode Jaccard Similarity memiliki tingkat kemiripan sebesar 47.3181%.
DESAIN DAN IMPLEMENTASI PADA WIFI PUSTIKOM FREE ACCESS DI PUSAT TEKNOLOGI INFORMASI DAN KOMUNIKASI UNIVERSITAS NEGERI JAKARTA MENGGUNAKAN MIKROTIK DAN WIRESHARK UNTUK ANALISIS TERHADAP SERANGAN PACKET SNIFFING DAN NETCUT
Authors: Reivaldi Kesuma Kagi  , Muchammad Ficky Duskarnaen  , Hamidillah Ajie  
Published: February 2021

Di lingkungan UPT TIK kampus A universitas negeri jakarta hotspot internet tanpa password dibutuhkan untuk mencari materi perkuliahan, mengirim email, dan mengakses layanan kampus seperti sistem informasi akademik. UPT TIK menyediakan fasilitas internet yang bisa diakses pelajar, pengajar dan karyawan melalui Pustikom Free Access. Pengguna dapat mengakses hotspot kapan saja tanpa harus login atau butuh password. Namun koneksi antara pengguna bisa saja diganggu oleh pengguna netcut yang dapat memutuskan jaringan kapan saja. Oleh sebab itu, dibutuhkan network analyzer.
Metode yang dipakai untuk membuat desain dan implementasi pustikom free access yaitu rekayasa teknik. Proses untuk membuat pustikom free access dimulai dari menginstal sistem operasi windows yang berfungsi untuk menjalankan aplikasi yang dibutuhkan oleh peneliti, menginstal aplikasi winbox, wireshark (network analyzer), dan ujicoba menggunakan jaringan lokal sebelum diterapkan di jaringan pustikom free access. Proses pengujian perangkat menggunakan metode blackbox testing dari sisi perangkat keras dan perangkat lunak. Hasil dari pengujian menunjukkan bahwa desain pustikom free access dapat berjalan dengan baik dan dapat dijadikan referensi untuk diterapan pada hotspot pustikom free access.
ANALISIS KINERJA PARAMETER THROUGHPUT DAN DELAY AKSES INETRNET DI SMK KARYAGUNA JAKARTA SELATAN
Authors: Vanny Andini  , Lipur Sugiyanta  , Bachren Zaini  
Published: February 2021

Penelitian ini dilakukan untuk menganalisa kinerja parameter throughput dan delay akses internet di SMK Karyaguna menggunakan piranti lunak Axence Net Tools Pro 5.0. Penelitian ini menggunakan metode penelitian rekayasa teknik, tahap implementasi hanya sampai pada tahapan pengukuran meliputi throughput dan delay dengan melakukan monitoring streaming dari laptop client ke server Berdasarkan hasil akhir dari analisis dapat simpulkan bahwa kinerja parameter throughput dan delay pada jaringan SMK Karyaguna masih jauh dari kata layak karena dipengaruhi oleh ke 2 parameter tersebut yaitu throughput dan delay. Throughput pada titik akses ruang guru dan titik akses ruang TKJ untuk perangkat monitor server www.yahoo.com didapatkan 5.77872%; www.detik.com didapatkan 33.0752%; www.facebook.com didapatkan 14.1951%. Delay pada www.yahoo.com didapati rata-rata delay terbesar yaitu pada pengukuran pada ruang TKJ sebesar 435 ms, delay ini menurut versi TIPHON termasuk kategori delay jelek karena delay >150 ms, untuk pengukuran pada ruang guru didapati rata-rata delay sebesar 121 ms mendapatkan predikat sedang karena delay berkisar 100 sampai dengan 150. Setelah itu untuk perangkat server www.detik.com pada titik akses guru mendapatkan delay 118 ms mendapatkan predikat sedang dan pada titik akses ruang TKJ delay sebesar 25 ms yang berarti bagus karena delay berkisar 50 sampai dengan 100. Pada perangkat www.facebook.com, workstation ruang guru mendapatkan delay 142 ms yang berarti sedang karena berkisar dari 100 sampai dengan 150ms. Lalu pada workstation ruang TKJ mendapatkan delay 59 yang berarti bagus.
A Universal Urbach Rule for Disordered Organic Semiconductors
Authors: Kaiser Christina , Sandberg Oskar , Zarrabi Nasim , Li Wei , Meredith Paul , Armin Ardalan 
Published: February 2021

Abstract
In crystalline semiconductors, the sharpness of the absorption spectrum onset is characterized by temperature-dependent Urbach energies. These energies quantify the static, structural disorder causing localized exponential tail states, and the dynamic disorder due to electron-phonon scattering. The applicability of this exponential-tail model to molecular and amorphous solids has long been debated. Nonetheless, exponential fittings are routinely applied to the analysis of the sub-gap absorption of organic semiconductors alongside Gaussian-like spectral line-shapes predicted by non-adiabatic Marcus theory. Herein, we elucidate the sub-gap spectral line-shapes of organic semiconductors and their blends by temperature-dependent quantum efficiency measurements in photovoltaic structures. We find that the Urbach energy associated with singlet excitons universally equals the thermal energy regardless of static disorder. These observations are consistent with absorption spectra obtained from a convolution of Gaussian density of excitonic states weighted by a Boltzmann factor. A generalized Marcus charge transfer model is presented that explains the absorption spectral line-shape of disordered molecular matrices, and we also provide a simple strategy to determine the excitonic disorder energy. Our findings elaborate the true meaning of the dynamic Urbach energy in molecular solids and deliver a way of relating the photo-physics to static disorder, crucial for optimizing molecular electronic devices such as organic solar cells.
Wolbachia-driven selective sweep in a range expanding insect species
Authors: Deng Junchen , Assandri Giacomo , Chauhan Pallavi , Futahashi Ryo , Galimberti Andrea , Hansson Bengt , Lancaster Lesley , Takahashi Yuma , Svensson Erik I , Duplouy Anne 
Published: February 2021

Abstract
Background Evolutionary processes can cause strong spatial genetic signatures, such as local loss of genetic diversity, or conflicting histories from mitochondrial versus nuclear markers. Investigating these genetic patterns is important, as they may reveal obscured processes and players. The maternally inherited bacterium Wolbachia is among the most widespread symbionts in insects. Wolbachia typically spreads within host species by conferring direct fitness benefits, or by manipulating its host reproduction to favour infected over uninfected females. Under sufficient selective advantage, the mitochondrial haplotype associated with the favoured symbiotic strains will spread (i.e. hitchhike), resulting in low mitochondrial genetic variation across the host species range. The common bluetail damselfly (Ischnura elegans: van der Linden, 1820) has recently emerged as a model organism of the genetics and genomic signatures of range expansion during climate change. Although there is accumulating data on the consequences of such expansion on the genetic of I. elegans, no study has screened for Wolbachia in the damselfly genus Ischnura. Here, we present the biogeographic variation in Wolbachia prevalence and penetrance in 17 I. elegans populations across Europe and Japan, and from close relatives in the Mediterranean area (i.e. I. genei: Rambur, 1842; and I. saharensis: Aguesse, 1958). Results Our data reveal (a) multiple Wolbachia-strains, (b) potential transfer of the symbiont through hybridization, (c) higher infection rates at higher latitudes, and (d) reduced mitochondrial diversity in the north-west populations, indicative of hitchhiking associated with the selective sweep of the most common strain. We found low mitochondrial haplotype diversity in the Wolbachia-infected north-western European populations (Sweden, Scotland, the Netherlands, Belgium, France and Italy) of I. elegans, and, conversely, higher mitochondrial diversity in populations with low penetrance of Wolbachia (Ukraine, Greece, Montenegro and Cyprus). The timing of the selective sweep associated with infected lineages was estimated between 20 000 to 44 000 years before present, which is consistent with the end of the last glacial period about 20 000 ya. Conclusions Our findings provide an example of how endosymbiont infections ca shape spatial variation in their host evolutionary genetics during postglacial expansion. These results also challenge population genetic studies that do not consider the prevalence of symbionts in many insects, which can impact geographic patterns of mitochondrial genetic diversity.
A retrospective comparative study of open reduction and cannulated screw fixation and Kirschner wire fixation in the treatment of fracture of lateral condyle of humerus in children
Authors: LUO XIANYONG , CHEN XINRANG , WANG JIAXIANG 
Published: February 2021

Abstract
Objective To evaluate the clinical efficacy of two surgical methods in the treatment of fracture of lateral condyle of humerus in children and the application value of two kinds of internal fixation materials.Methods A total of 32 children with fracture of lateral condyle of humerus were treated in our hospital from June 2015 to June 2018, with an average age of 5.6 years, including 18 males and 14 females. The patients were divided into two groups: group A (n = 12) and group B (n = 20). By comparing the operation time, removal of internal fixation time, Dhillon elbow function evaluation, HHS elbow function score, X-ray measurement of postoperative carrying angle, Baumann angle and distal humerus anteversion angle, the operation-related complications were recorded in detail.Results The operation time was 0.9 ±0.2 hours in group A, 0.8 ±0.2 hours in group B, P > 0.05. The removal internal fixation time was 91 ±8 days in group A, 59 ±10 days in group B (P < 0.05). The Dhillon elbow function score was 8.2 ±0.6 in group A, 8.0 ±0.8 in group B, and 93 ±5 in group A and 89 ±4 in group B (P > 0.05). The carrying angle was 10 °±1 °in group A and 10 °±2 °in group B (P > 0.05). The Baumann angle was 15 °±4 °in group A and 16 °±3 °in group B (P > 0.05). The anteversion of distal humerus was 33 °±3 °in group A and 33 °±4 °in group B (P > 0.05). In the last follow-up, the excellent and good rate of elbow joint function in group A was excellent in 8 cases and good in 4 cases, and the excellent and good rate in group B was 100%. In group B, 13 cases were excellent, 6 cases were good, and 1 case was moderate, with an excellent and good rate of 95%. The postoperative complications were observed in group A, including avascular necrosis of lateral condyle in 1 case, premature closure of epiphysis in 1 case, skin irritation in 5 cases, needle exudation and incision infection in 2 cases, hyperplasia of lateral condyle in 3 cases, and loss of extension and flexion in 1 case.Conclusions There was no significant difference in operation time, elbow function recovery and imaging measurement between the two surgical methods in the treatment of lateral condylar fracture of humerus. Kirschner wire group had a certain advantage over cannulated cancellus screw group in fracture healing and removal of internal fixation. however, the clinical observation screw group has advantages in postoperative nursing and early exercise.
Correlation between disability measure and Black Hole (T1 hypointense lesion) lesion load in brain Magnetic Resonance Imaging (MRI) of patients with multiple sclerosis (MS): Protocol for a systematic review and meta-analysis
Authors: Valizadeh Amir , Barati Elham , Sahraian Mohammad Ali , Fattahi Mohammad Reza , Moassefi Mana 
Published: February 2021

Abstract
Introduction: As the role of neurodegeneration in the pathophysiology of multiple sclerosis (MS) has become more prominent, the formation and evolution of chronic or persistent T1-hypointense lesions (Black Holes) have been used as markers of axonal loss and neuronal destruction to measure disease activity. However, findings regarding this subject are controversial. In this study we aim to clarify the level of importance of T1 hypointense lesions for estimating the prognosis of patients.Methods: We will search MEDLINE (through PubMed), Embase and Web of Science for relevant studies. We will extract the Spearman's rank correlation coefficient (SRCC) between the T1 hypointense lesion volume and Extended Disability Status Scale (EDSS) in participants. All included studies will be evaluated for the risk of bias. We will also perform a meta-analysis on the data. The risk of publication bias will be evaluated using Funnel plots. Finally, we will assess the confidence in cumulative evidence using an adapted version of GRADE.