bluuebunny/crossref_metadata_2025 huggingface dataset:
Technical project development of the mixed river-sea naviganavigation cargo vessel, SUKHOGRUZ-M
Authors:   JSC NPP “Aviation and Marine Electronics”, St. Petersburg, Russia, Chistyakova T.G. , Karpunina V.P. ,   JSC NPP “Aviation and Marine Electronics”, St. Petersburg, Russia
Published: February 2022

The technical project of the universal dry cargo vessel of the mixed navigation class “river-sea” together with other projects solves the problem of mass aging of the Russian fleet and the high cost of imported complete equipment, the increased demand for civil transport vessels of mixed navigation, in particular for universal dry cargo vessels, by creating a new vessel with improved characteristics, during the construction of which the maximum number of components of the domestic production is used, an environmentally friendly energy installation, it allows to meet the international requirements for emissions of harmful substances into the atmosphere according to the Tier III standard, as well as modular structural solutions and composite materials.
Development of the Register requirements for berth-connected non-propelled ships and floating facilities intended for operation without docking
Authors:   Russian Maritime Register of Shipping, St. Petersburg, Russia, Shurpyak V.K.
Published: February 2022

The presentation informs about the new requirements of the Register, developed for berth-connected non-propelled ships and floating facilities, providing for operation without docking for 40–50 years. Briefly described the main additional requirements, for ships with new marks UWILD or UWILD (S).
Accelerated life tests of domestic prototypes of elastomeric seals for subsea oil and gas production systems
Authors:   JSC NPP “Aviation and Marine Electronics”, St. Petersburg, Russia, Chistyakova T.G. , Karpunina V.P. ,   JSC NPP “Aviation and Marine Electronics”, St. Petersburg, Russia, Chulkin S.G. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia
Published: February 2022

This work was performed with the aim of confirming the competence of Russian industrial enterprises in the development of subsea production system facilities and applies to elastomeric seals of Christmas tree and tubing hanger, and is intended to confirm the service life of elastomeric seals. The essence of the method is to test the cyclic effect of pressure, temperature and several cycles of axial movement on not aged (new) seals and on aged (at the end of the warranty period of storage and operation) seals.
Controle de plantas daninhas avaliado visualmente e por imagens aéreas
Authors: Campos Saulo Felipe Brockes , Cunha João Paulo Arantes Rodrigues da , Lemes Ernane Miranda
Published: February 2022

O emprego de aeronaves remotamente pilotadas (ARPs) para obtenção de imagens no campo tem crescido e pode auxiliar o manejo de plantas daninhas, contudo, os softwares para análise e processamento das imagens precisam ser testados sob diferentes condições para o desenvolvimento das rotinas e validação dos resultados. O objetivo deste trabalho foi correlacionar os resultados da metodologia de avaliação visual, com escala de notas, com os resultados do processamento de imagens com os softwares SisCob® e ImageJ®, na análise da ocorrência e eficácia de controle de plantas daninhas. As comparações foram feitas em dez áreas com diferentes níveis de infestação de plantas daninhas. A partir de uma área em pousio há quatro meses, submeteu-se a mesma a diferentes tratamentos de controle químico com herbicida glifosato, incluindo uma testemunha sem aplicação, variando taxa de aplicação (50, 90 e 150 L ha-1), adição de adjuvante e presença de pulverização eletrostática. Após 35 dias da aplicação do herbicida, cada uma das áreas foi avaliada visualmente, e paralelamente foi feito o sobrevoo com uma ARP para coleta das imagens aéreas e posterior processamento digital, usando os dois softwares para quantificação em percentagem do controle com o herbicida. Todas as correlações testadas (Pearson, Spearman e Kendall) foram significativas e positivas, indicando que o uso de ARPs para coleta de imagens e seu processamento através dos softwares demonstraram potencial como alternativa para a avaliação da infestação e controle de plantas daninhas, podendo substituir a avaliação visual com operador a campo, evitando a subjetividade e a morosidade.
Optimization of Genetic Algorithm in Courses Scheduling
Authors: Nasien Dewi , Andi Andi
Published: February 2022

Scheduling courses is an intricate and pivotal part of a university as it impacts the teaching and learning process. The problem frequently occurs is the struggle of placing schedules which is manual, takes a long time, and inaccurate. This paper explores the process and how effective the genetic algorithm method is in solving scheduling problems in lecture environment. The selection of genetic algorithms owes to it produces an optimal scheduling solution. To build a scheduling optimization system, it is essential to collect room data, lecturers, courses, days and hours of teaching. The data collection comes from field studies by observations and interviews. Literature studies are also needed to acquire the basic course scheduling, optimization, genetic algorithms, PHP, MySQL, Bootstrap, and Visual Studio Code.  The test outcomes attained the preeminent one with the highest fitness value in the number of generations, populations, the crossover combination and mutation rates. The final result showed that the first chromosome is the finest chromosome produces scheduling with the highest fitness value. The outcomes of the whole algorithm process are consistent with the original predicted data, and the same lecturer is not scheduled to teach more than once at the same time. It is expected that the application of the genetic algorithm method optimizes course scheduling with great outcome.
PENGARUH PEMBIAYAAN MURABAHAH, MUDHARABAH, IJARAH DAN RASIO NON PERFORMING FINANCING TERHADAP PROFITABILITAS PT BANK BRI SYARIAH TBK
Authors: Suryadi Nanda
Published: February 2022

Penelitian ini bertujuan untuk menguji dan menganalisis profitabilitas PT. Bank BRI Syariah Tbk. Adapun beberapa faktor yang dianalisis dalam mempengaruhi profitabilitas adalah pembiayaan murabahah, mudharabah, ijarah, dan rasio non performing financing. Metode analisis data yang digunakan dalam penelitian ini adalah analisis regresi linier berganda, data diperoleh berdasarkan data triwulan yang terdapat di laporan keuangan Bank BRI Syariah dari bulan Januari 2014 sampai dengan Desember 2020. Instrumen pengumpulan data yang digunakan bersumber dari laporan keuangan Bank BRI Syariah. Hasil penelitian ini menunjukan bahwa pembiayaan mudharabah dan rasio non performing financing secara parsial berpengaruh signifikan terhadap profitabilitas, sedangkan pembiayaan murabahah dan pembiayaan ijarah secara parsial tidak berpengaruh signifikan terhadap profitabilitas. Hasil pengujian secara simultan pembiayaan murabahah, pembiayaan mudharabah, pembiayaan ijarah dan rasio non performing financing memiliki pengaruh signifikan terhadap profitabilitas. Dari hasil uji koefisien determinasi dapat diketahui bahwa nilai R Square sebesar 0,396 atau 39,6%. Hal ini menunjukkan bahwa kemampuan variabel independen dalam penelitian ini untuk menerangkan variabel dependen ialah sebesar 39,6% dan sisanya 60,4% dipengaruhi oleh variabel lainya.
Changes and personnel of a company
Authors: Tuczapski Jakub
Published: February 2022

The article presents selected problems accompanying change management, with particular emphasis on possible behaviours on the part of staff. By emphasizing the possible reactions of employees to changes in the organization, possible ways of overcoming barriers that may appear in the process of change were emphasized. The role that should be played by a manager, who must be a leader and a leader who inspires staff during a shift, is emphasized.
Analisis Kebutuhan Pengembangan Media Pembelajaran Geometri Bermuatan Pendidikan Karakter Menggunakan Macromedia Flash 8 Berbasis Android
Authors:   Program Studi Pasca Sarjana Pendidikan Matematika FKIP Untan Pontianak, Daling Stepanus , Rif'at Mohamad ,   Program Studi Pasca Sarjana Pendidikan Matematika FKIP Untan Pontianak, Beta Adriana Nada ,   Program Studi Pendidikan Matematika IKIP-PGRI Pontianak, Hodiyanto Hodiyanto ,   Program Studi Pendidikan Matematika IKIP-PGRI Pontianak, Haryadi Rahman ,   Program Studi Pendidikan Matematika IKIP-PGRI Pontianak
Published: February 2022

Penelitian ini bertujuan untuk mengetahui kebutuhan media pembelajaran yang akan dikembangkan menggunakan aplikasi Macromedia Flash 8 pada pokok bahasan Geometri Dimensi Tiga. Penelitian ini merupakan penelitian awal yang termasuk di dalam tahap Pendefinisian (Define) dalam prosedur R & D model 4D (four-D) yang telah dimodifikasi menjadi 3D meliputi tiga tahapan yaitu: pendefinisian (define), perancangan (design) dan pengembangan (develop). Penelitian ini hanya terbatas pada tahap Define. Teknik pengumpulan data dilakukan dengan cara observasi dan wawancara terhadap Guru dan Peserta Didik kelas X SMA Wisuda Pontianak. Hasil penelitian ini menunjukkan bahwa dalam pembelajaran geometri dibutuhkan media pembelajaran berbentuk Macromedia Flash 8 berbasis android yang bermuatan nilai-nilai pendidikan karakter pada peserta didik.
Addition Coupled Electron Transfer (ACET) and Addition Coupled Electron Coupled Proton Transfer (ACPCET)
Authors: Ma Yumiao
Published: February 2022

The new types of elementary reaction in which a nucleophilic addition (A) to quinones is coupled with electron transfer (ET) and even further proton transfer (PT) are suggested herein by density functional theory calculation, which are called Addition Coupled Electron Transfer (ACET) and Addition Coupled Proton Coupled Electron Transfer (ACPCET). With a [2.2]paracyclophane-derived biquinone as the substrate, the nature of nucleophilic addition onto its sp2 carbons exhibits a change from stepwise A-ET-PT to ACET-PT and further to ACPCET, in parallel with the decreased nucleophilicity of the attacking reagent. In addition, we further proposed six possible potential energy surfaces and the coupling modes among A, ET and PT, among which three have been found in this work. Quasi-classical trajectory shows that the ACET and PT event can also be dynamically concerted even for an ACET-PT mechanism.
Pancreatitis aguda en pacientes con litiasis biliar ingresados en el hospital Martín Icaza
Authors: López Díaz Madelyne Valeria , Cabrera Bernal Hugo Fernando , Viteri Rojas Ana María , Prieto Aguayo María Paulina Reyes
Published: February 2022

La pancreatitis aguda se produce comúnmente por la obstrucción que genera los cálculos biliares lo cual da origen a la autodigestión de la glándula por sus propias enzimas. Se caracteriza por dolor abdominal, náuseas, vómitos, y predomina en el sexo femenino. El objetivo del presente estudio es analizar la pancreatitis aguda en pacientes con litiasis biliar ingresados en el Hospital General Martin Icaza durante el año 2020 – 2021. Es un estudio retrospectivo, no experimental de corte transversal, descriptivo y analítico debido al análisis de las historias clínicas de los pacientes ingresados en el Hospital General Martin Icaza 2020 – 2021. Durante el periodo comprendido entre el 1 enero del 2020, hasta el 1 de mayo del 2021 se detectaron 31 pacientes con pancreatitis aguda de origen biliar, donde se encontró que el 36% de casos se presentó a los 20-25 años de edad; siendo más común la población femenina con un 65%; también se detectó que los pacientes acuden a la unidad hospitalaria por presentar dolor abdominal 30% y vomito 25%, y que el 16% presentaba antecedentes patológicos personales de litiasis biliar. En base a este estudio podemos concluir que el síntoma más característico es el dolor abdominal, las edades más frecuentes en desarrollar una pancreatitis aguda oscila entre los 20 a 25 años, el sexo más predominante en desarrollar pancreatitis aguda es el femenino, el factor de riesgo más frecuente es la de origen biliar.
Analisis Kesalahan Siswa dalam Menyelesaikan Soal Cerita Berdasarkan Tahapan Pemecahan Masalah Polya Ditinjau dari Gaya Belajar
Authors: Pangestu Kusuma Damar Jati , Zuhri Muhammad Saifuddin , Sugiyanti Sugiyanti
Published: February 2022

Penelitian ini bertujuan untuk menunjukan letak kesalahan-kesalahan penyelesaian soal cerita matematika materi bilangan berdasarkan tahapan pemecahan masalah Polya ditinjau dari gaya belajar siswa. Jenis penelitian ini adalah kualitatif deskriptif dengan menggunakan teknik purposive sampling maka, dipilih subjek penelitian sebanyak tiga siswa kelas IX di SMPN 4 Semarang. Adapun teknik pengumpulan data dengan pemberian angket gaya belajar dan tes, kemudian melalui tiga tahapan analisis data yaitu reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian diperoleh bahwa jenis kesalahan yang dilakukan oleh (1) subjek bergaya belajar visual adalah kesalahan menentukan variabel matematika, kesalahan perhitungan matematika, kesalahan perhitungan matematika dalam memeriksa kembali solusi yang diperoleh, dan kesalahan hasil akhir (2) subjek bergaya belajar auditorial adalah kesalahan menentukan variabel matematika, kesalahan merencanakan pemecahan masalah, kesalahan perhitungan matematika dalam memeriksa kembali solusi yang diperoleh, dan kesalahan hasil akhir, dan (3) subjek bergaya belajar kinestetik adalah kesalahan menentukan variabel matematika, kesalahan merencanakan pemecahan masalah, kesalahan perhitungan matematika dalam memeriksa kembali solusi yang diperoleh, dan kesalahan hasil akhir. Sedangkan pada indikator soal mencakup materi bilangan yang disesuaikan dengan tahapan-tahapan pemecahan masalah Polya dengan indikator soal: mengaplikasikan pengetahuan tentang operasi bilangan pecahan serta dapat menggunakan nalar untuk menyelesaikan soal cerita yang berkaitan dengan bilangan pecahan.
Efektivitas Model Pembelajaran Process Oriented Guided Inquiry Learning (Pogil) Dan Means Ends Analysis (Mea) Berbantuan Question Card Terhadap Kemampuan Pemecahan Masalah
Authors: Margarita Margarita , Indiati Intan , Nugroho Aryo Andri
Published: February 2022

Penelitian ini bertujuan untuk mengetahui efektivitas model pembelajaran POGIL berbantuan Question Card, model pembelajaran MEA berbantuan Question Card,  dan model pembelajaran konvensional terhadap kemampuan pemecahan masalah. Jenis penelitian ini adalah kuantitatif dengan desain penelitian post test only control design. Populasi pada penelitian ini adalah seluruh siswa kelas X IPS SMAN 1 Gubug. Pengambilan sampel menggunakan teknik cluster random sampling. Sampel penelitian yaitu kelas X IPS 1, X IPS 2, X IPS 3. Teknik pengambilan data yang digunakan adalah dokumentasi, dan tes kemampuan pemecahan masalah. Hasil penelitian menyatakan bahwa (1) pembelajaran POGIL dan MEA dapat tuntas klasikal dan individual; (2) terdapat pengaruh keaktifan siswa terhadap kemampuan pemecahan masalah pada kelas POGIL sebesar 43% dan kelas MEA sebesar 56%; (3) terdapat perbedaan kemampuan pemecahan masalah matematika siswa antara ketiga model pembelajaran tersebut; (4) pembelajaran POGIL  berbantuan Question Card lebih baik dari pembelajaran konvensional; (5) pembelajaran MEA berbantuan  Question Card lebih baik dari pembelajaran konvensional; (6) tidak terdapat perbedaan model pembelajaran POGIL dan MEA.
Analisis Kesulitan Siswa dalam Merepresentasikan Soal Cerita pada Materi Program Linier Ditinjau dari Gaya Kognitif Field dependent dan Field Independent
Authors: Marlina Marlina , Kusumaningsih Widya , Zuhri Muhammad Saifuddin
Published: February 2022

Tujuan penelitian ini adalah untuk menganalisis kesulitan yang dialami siswa dalam menyelesaikan soal cerita yang berkaitan dengan kemampuan representasi matematika ditinjau dari gaya kognitif field dependent dan field independent. Metode yang digunakan dalam penelitian ini yaitu deskriptif kualitatif. Subjek penelitian ini adalah 4 orang siswa kelas XII AKL .Materi yang digunakan untuk penelitian ini yaitu program linier. Pengumpulan data yang dilakukan yaitu dengan tes GEFT, tes tertulis, dan wawancara. Teknik analisis data dilakukan dengan 3 tahapan yaitu reduksi data, penyajian data, dan penarikan kesimpulan/verifikasi. Keabsahan data menggunakan triangulasi teknik yaitu membandingkan hasil tes kemampuan representasi dengan hasil wawancara. Analisis dikembangkan berdasarkan indikator kemampuan representasi matematis yang memperhatikan gaya kognitif yang dimiliki siswa. Hasil penelitian menunjukan bahwa kemampuan representasi matematis siswa dengan gaya kognitif field depemdent hanya mencapai 2 indikator yaitu representasi visual dan representasi persamaan atau ekspresi matematis, kesulitan yang dialami siswa dengan gaya kognitif ini terlelak pada jenis kesulitan representasi verbal. Sedangkan untuk siswa dengan gaya kognitif field independent  mampu menycakup semua indikaror representasi yaitu representasi visual, representasi persamaan atau ekspresi matematis, dan representasi verbal.Kata Kunci: Kemampuan Representasi Matemati; Kesulitan; Gaya Kognitif.
Implementasi Model Problem Based Learning dan Discovery Learning Terhadap Prestasi Belajar Matematika Siswa
Authors: Dhanieargo Aszhar Annas , Handayanto Agung , Aini Aurora Nur
Published: February 2022

Penelitian ini didasarkan pada rendahnya prestasi belajar matematis siswa. Hal ini dikarenakan proses pembelajaran di kelas menggunakan pembelajaran langsung yang didominasi oleh guru dan siswa cenderung tidak aktif dalam kegiatan pembelajaran, sehingga mengakibatkan prestasi belajar matematika siswa masih rendah. Problem Based Learning (PBL) dan Discovery Learning (DL) merupakan model pembelajaran yang dapat membuat siswa aktif serta meningkatkan prestasi belajar siswa. Penelitian ini bertujuan untuk mengetahui: (1) apakah terdapat perbedaan antara prestasi belajar siswa menggunakan model PBL, dengan menggunakan model DL, dan juga dengan menggunakan pembelajaran langsung; dan (2) mana yang lebih baik antara model PBL, DL, dan pembelajaran langsung terhadap prestasi belajar matematika siswa pada materi sistem persamaan linear dua variabel. Penelitian ini menggunakan metode penelitian quasi eksperimen. Data dikumpulkan melalui tes kemampuan prestasi belajar siswa. Beberapa uji yang dilakukan pada tingkat signifikansi 5% dalam penelitian ini yaitu: (1) Uji anava satu jalan yang didapatkan kesimpulan bahwa terdapat perbedaan antara prestasi belajar matematika siswa menggunakan model PBL, dengan menggunakan model DL, dan juga dengan menggunakan pembelajaran langsung; dan (2) Uji Scheffe’ didapatkan kesimpulan bahwa prestasi belajar siswa menggunakan model PBL dan menggunakan model DL lebih baik dibandingkan dengan menggunakan pembelajaran langsung, serta didapatkan kesimpulan bahwa tidak ada perbedaan prestasi belajar siswa yang menggunakan model PBL dan menggunkan model DL.
Analisis Kemampuan Pemecahan Masalah Matematis Siswa SMP pada Masa Pandemik Covid-19
Authors: Munengsih Munengsih , Safitri Prahesti Tirta , Sukmawati Rika
Published: February 2022

Kemampuan pemecahan masalah matematis siswa adalah salah satu kompetensi matematis yang sangat penting untuk dikuasai oleh siswa meskipun dalam keadaan pandemik covid-19, karena dengan menguasai kemampuan pemecahan masalah siswa mudah mengerjakan dalam segala bidang maupun kehidupan sehari-hari. Penelitian ini merupakan penelitian kualitatif yang bertujuan untuk mendeskripsikan kemampuan pemecahan masalah matematis siswa kelas VII SMP Negeri 2 Curug pada masa pandemik covid-19. Penelitian ini dilakukan sebanyak 36 siswa di kelas VII SMP Negeri 2 Curug. Subjek penelitian dalam penelitian ini berjumlah tiga siswa. Teknik pengambilan subjek pada penelitian ini dilakukan secara random dengan kategori tinggi, sedang, dan rendah. Instrumen dalam penelitian ini menggunakan tes dengan dua soal pemecahan masalah materi bilangan pecahan. Pengumpulan data dalam penelitian ini menggunakan teknik triangulasi. Teknik analisis data menggunakan model Miles dan Huberman, yaitu reduksi data, penyajia data, dan kesimpulan. Berdasarkan hasil penelitian menunjukan bahwa kemampuan pemecahan masalah matematis siswa pada kategori tinggi  diperoleh sebanyak 14% atau 5 siswa, kemampuan pemecahan masalah matematis siswa pada kategori sedang diperoleh sebanyak 74% atau 27 siswa, dan kemampuan pemecahan masalah matematis siswa pada kategori rendah diperoleh sebanyak 12% atau 4 siswa. Hasil pembahasan menunjukan siswa dengan kategori tinggi mampu menyelesaikan pemecahan masalah dari tiap tahapan-tahapan pemecahan masalah dan memenuhi semua indikator dengan benar. Siswa pada kategori sedang hanya mampu menyelesaikan pada tahapan memahami masalah, melakukan perencanaan, dan menyelesaikan perencanaan, tetapi belum mampu memeriksa kembali. Pada kategori rendah siswa hanya mampu melakukan rencana dan menyelesaikannya meskipun kurang tepat.
Pengaruh Model Pembelajaran Quantum Learning dan Active Learning Berbantu Aplikasi Quizizz terhadap Hasil Belajar Matematika Siswa Kelas XI
Authors: Ningsih Meita Prihastuty , Sugiyanti Sugiyanti , Ariyanto Lilik
Published: February 2022

Penelitian ini merupakan penelitian eksperimen yang bermaksud untuk mengetahui pengaruh model pembelajaran Quantum Learning dan Active Learning berbantu aplikasi Quizizz terhadap hasil belajar matematika siswa kelas XI. Sampel penelitian diambil dengan teknik cluster random sampling. Populasi penelitian ini adalah seluruh siswa kelas XI SMA Negeri 1 Sale. Diambil sampel sebanyak 2 kelas, kelas XI IPS 2 sebagai kelas eksperimen 1 dan kelas XI IPS 3 sebagai kelas eksperimen 2. Pengambilan data penelitian dengan menggunakan tes hasil belajar berupa soal pilihan ganda pada materi program linear dua variabel. Analisis data menggunakan Uji-t. Hasil penelitian diperoleh thitung dari model pembelajaran Quantum Learning sebesar 62,855 dan thitung dari model pembelajaran Active Learning sebesar 29,478 dimana keduanya sama-sama melebihi ttabel keduanya yaitu 2,04523 dengan taraf kepercayaan 95%. Kesimpulan yang diperoleh adalah model pembelajaran Quantum Learning dan Active Learning berbantu aplikasi Quizizz berpengaruh terhadap hasil belajar matematika siswa kelas XI.
Efektivitas Model Pembelajaran ATI Dan CRH Menggunakan Strategi Guided Teaching Terhadap Kemampuan Pemahaman Konsep
Authors: Fiani Rizki , Sudargo Sudargo , Kusumaningsih Widya
Published: February 2022

Penelitian ini bertujuan untuk mengetahui efektivitas model pembelajaran ATI menggunakan strategi  Guided Teaching, model pembelajaran CRH menggunakan strategi Guided Teaching,  dan model pembelajaran konvensional terhadap kemampuan pemahaman konsep. Jenis penelitian ini adalah kuantitatif dengan desain penelitian post test only control design. Populasi pada penelitian ini adalah seluruh siswa kelas XI MIPA SMA Negeri 1 Gubug. Pengambilan sampel menggunakan teknik cluster random sampling. Sampel penelitian yaitu kelas XI MIPA 1, XI MIPA 2, XI MIPA 3. Teknik pengambilan data yang digunakan adalah dokumentasi, dan tes kemampuan pemahaman konsep. Hasil penelitian menyatakan bahwa (1) untuk ketuntasan klasikal dan individual kelas eksperimen 1 dan kelas eksperimen 2 rata-rata hasil kemampuan pemahaman konsepnya mencapai KKM; (2) keaktifan berpengaruh positif terhadap kemampuan pemahaman konsep pada kelas eksperimen 1 sebesar 72% dan kelas eksperimen 2 sebesar 58%; (3) terdapat perbedaan kemampuan pemahaman konsep siswa antara ketiga model pembelajaran tersebut; (4) pembelajaran ATI menggunakan strategi Guided Teaching lebih baik dari pembelajaran konvensional; (5) pembelajaran CRH menggunakan strategi  Guided Teaching lebih baik dari pembelajaran konvensional; (6) tidak terdapat perbedaan rata-rata kemampuan pemahaman konsep antara model pembelajaran ATI menggunakan strategi Guided Teaching dan model pembelajaran CRH menggunakan strategi Guided Teaching.
Profil Kemampuan Problem Posing Pada Materi Aritmatika Sosial Ditinjau Dari Perbedaan Kemampuan Matematis
Authors: Puspitasari Nesa Bunga , Kartinah Kartinah , Nugroho Aryo Andri
Published: February 2022

Tujuan yang hendak dicapai pada penelitian ini adalah untuk mengetahui kemampuan problem posing materi aritmatika sosial di tinjau dari perbedaan kemampuan matematis. Pada penelitian ini peneliti menggunakan uji kredibilitas untuk menguji keabsahan data. Dimana dalam uji kredibilitas tersebut menggunakan triangulasi. Triangulasi yang digunakan adalah triangulasi data, dimana dalam triangulasi ini peneliti mengguanakan metode yang sama dengan waktu yang berbeda. Uji kredibilitas data dilakukan dengan membandingkan data pada tahap pertama dan tahap kedua dan seterusnya dari hasil tes dan wawancara. Hasil yang dicapai peneliti bahwa anak dengan kemampuan matematis tinggi dapat secara kreatif dan inovatif dalam membuat soal serta menyelesaikan soal. Anak dengan kemampuan matematis sedang dapat membuat pertanyaan dan menyelesaikan soal dengan perbedaan bahwa anak kemampuan matematis tinggi dapat menyelesaikan soal dengan metode singkat dan anak berkemampuan sedang menyelesaikan soal berdasarkan konsep. Sedangkan, anak berkemampuan matematis rendah hanya dapat membuat soal secara sederhana dan mampu menyelesaikan tanpa ada modifikasi soal.
Profil Pemahaman Konsep Siswa dalam Pemecahan Masalah Matematika Menurut Tahapan Polya Ditinjau dari Perbedaan Jenis Kelamin
Authors: Monikasari Fika , Sugiyanti Sugiyanti , Kartinah Kartinah
Published: February 2022

Penelitian ini bertujuan untuk mengetahui profil pemahaman konsep siswa kelas VII dalam pemecahan masalah matematika menurut polya ditinjau dari perbedaan jenis kelamin pada pokok bahasan bilangan pecahan. Penelitian ini merupakan penelitian deskriptif kualitatif. Subjek penelitian yaitu sebanyak 4 orang siswa kelas VII SMP N 2 Dempet yang dipilih berdasarkan nilai ulangan harian bilangan pada kelompok sedang. Teknik pengumpulan data dalam penelitian ini berupa tes tertulis dan wawancara. Keabsahan data menggunakan triangulasi sumber. Hasil penelitian ini adalah: a) Profil pemahaman konsep siswa laki-laki dalam pemecahan masalah menurut tahapan Polya yaitu : mengumpulkan fakta – fakta dengan menyebutkan hal – hal yang diketahui dan ditanyakan, mengidentifikasi sifat-sifat sesuai dengan konsepnya dengan mengetahui mana yang contoh dan bukan contoh dari permasalahan yang diberikan, menjelaskan langkah – langkah strategi yang digunakan dalam pemecahan masalah, menyajikan konsep bilangan pecahan dalam bentuk representasi matematika, mengaplikasikan konsep atau algoritma pada bilangan pecahan, belum tepat dalam membuat kesimpulan pada jawaban yang sudah diperoleh. b) Profil pemahaman konsep siswa perempuan dalam pemecahan masalah menurut tahapan Polya yaitu : mengumpulkan fakta – fakta dengan menyebutkan hal – hal yang diketahui dan ditanyakan, mengidentifikasi sifat-sifat sesuai dengan konsepnya dengan mengetahui mana yang contoh dan bukan contoh dari permasalahan yang diberikan, menjelaskan langkah – langkah strategi yang digunakan dalam pemecahan masalah, menyajikan konsep bilangan pecahan dalam bentuk representasi matematika, mengaplikasikan konsep atau algoritma pada bilangan pecahan, membuat kesimpulan sesuai dengan langkah penyelesaian, membuktikan kebenaran dengan memeriksa kembali jawaban dan memastikan solusi yang diperoleh sudah benar karena langkah yang digunakan sudah benar.
Akibat hukum terhadap surat kuasa menjual yang dibuat secara notariil dalam penjatuhan pajak terhutang
Authors: Prandika Muchammad Ekky , Supriyadi Supriyadi
Published: February 2022

This article has the intent and purpose to find out the legal consequences arising from the existence of a binding sale and purchase agreement (PPJB) with a power of attorney to sell which is notarized which can result in a tax payable, Customs Duty on Acquisition of Land and Building Rights (BPHTB) and Income Tax Collection ( PPh) On the Transfer of HAT, it is reviewed based on the PDRD Law and Government Regulation of the Republic of Indonesia Number 34 of 2016 concerning Income Tax on Income from the Transfer of Land and/or Building Rights, and the Sale and Purchase Agreement on Land and/or Building and its Amendments. The type of research in this research is normative juridical law research, with the approach used in this research being statutory approval. The Sale and Purchase Binding Agreement (PPJB) is a legal breakthrough made by a Notary to overcome the problems faced in the implementation of the sale and purchase of land rights as previously explained. Legal discoveries made and applied by a Notary regarding the use of a Sale and Purchase Binding Agreement (PPJB) in assisting the implementation of the sale and purchase of land rights or as a preliminary agreement before making a Sale and Purchase Deed so that the existence of PPJB does not mean transferring or transferring a Land Right.How to cite item: Prandika, M., Supriyadi, S. (2021). Akibat hukum terhadap surat kuasa menjual yang dibuat secara notariil dalam penjatuhan pajak terhutang. Jurnal Cakrawala Hukum, 12(3), 326-333. doi:https://doi.org/10.26905/idjch.v12i3.5176.
Stability of Positive Weak Solution for Generalized Weighted p-Fisher-Kolmogoroff Nonlinear Stationary-State Problem
Authors: Khafagy Salah A. , Serag Hassan M.
Published: February 2022

In the present paper, we investigate the stability results of positive weak solution for the generalized Fisher–Kolmogoroff nonlinear stationary-state problem involving weighted p-Laplacian operator −d∆P,pu = ka(x)u[ν − υu] in Ω, Bu = 0 on ∂Ω, where ∆P,p with p > 1 and P = P(x) is a weight function, denotes the weighted p-Laplacian defined by ∆P,pu ≡ div[P(x)|∇u|p−2∇u], the continuous function a(x): Ω → R satisfies either a(x) > 0 or a(x) < 0 for all x ∈ Ω, d, k, ν and υ are positive parameters and Ω ⊂ RN is a bounded domain with smooth boundary Bu = δh(x)u + (1 − δ) ∂u/∂n where δ ∈ [0, 1], h: ∂Ω → R+ with h = 1 when δ = 1.
Monitoring of climatic changes and their impact on grain production in the Saratov region using remote sensing data
Authors: Neufeld Vasily Voldemarovich , Kadomtseva Marina Evgenievna , Osovin Maksim Nikolaevich
Published: February 2022

Differentiated development of climatic risks in agricultural regions leads to fluctuations in yields and agricultural production volumes, disruption of food chains and a decrease in food reserves, thereby endangering sustainable agricultural production and creating risks for ensuring the country's food security. In the period from 1991 to 2019 in the Saratov region, using satellite monitoring data, a number of unfavorable meteorological (weather) phenomena were identified.  The dependence of the main indicators of grain production in the Saratov region on the growing influence of negative climatic factors has been investigated. The necessity of taking into account the impact of hazardous meteorological (weather) phenomena in the system of strategic priorities, as well as when making forecasts for the socio-economic development of the region, modeling the influence of negative climatic factors on the structural balance of the agro-industrial complex has been substantiated.
Development of annual ornamental plants during spring sowing in a continental climate
Authors: Sarlaeva Mara Yanovna , Vasilyeva Olga Yurievna
Published: February 2022

The results of studying the biological characteristics and ornamental qualities of annual ornamental plants from the families Brassicaceae, Caryophyllaceae, Hydrophyllaceae and Tropaeolaceae during spring sowing in the ground are presented. The research was carried out in the conditions of the continental climate of the forest-steppe of Western Siberia. The work used experimental methods-phenological observations and descriptions of ontogenetic states and theoretical research methods - analysis of phenospectres in comparison with hydrothermal conditions of vegetation periods, digital image processing of objects using a Carl Zeiss Stereo Discovery V12 stereomicroscope with an AxioCam MRc-5 digital camera, mathematical statistics. Agricultural techniques for row and nest sowing are described. It is determined that the soil readiness for sowing ornamental annuals is influenced by the hydrothermal conditions of the third decade of April - the first decade of May, and the conditions of the third decade of May affect the state of seedlings. Warm, dry weather from mid-August to mid-September is the most favorable for the ripening of fruits and seeds, as well as their gathering. A template of phenospectres has been developed to form a phenotheca for training specialists in the field of decorative plant growing and landscape architecture. A digital seed library of annual ornamental plant species has been created, which is used in practical classes at the Novosibirsk State Agrarian University (NGAU) and the Novosibirsk State University of Architecture, Design and Arts (NGUADI). Descriptions of biological features and ornamental qualities, as well as the main morphometric parameters of 12 species of beautifully flowering annual plants are given.
Application of RT-PCR method for the determination of fungal and bacterial dna in the preservation of green mass of alfalfa with Lacticaseibacillus paracasei and Lactiplantibacillus plantarum
Authors: Afordoanyi Daniel Mavuena , Validov Shamil Zavdatovich , Bikchantaev Irek Tagirovich , Krupin Evgeny Olegovich
Published: February 2022

New Lactobacillus strains, Lacticaseibacillus paracasei L1a and Lactiplantibacillus plantarum S1a R were isolated from bovine feces were used as bioconservants for Medicago sativa (alfalfa) silage after 16S rRNA identification. After 60 days the fungal content in the silage was defined by the method of qPCR using primers based on the ?-actin gene of fungi. L1a and S1a R were able to reduce fungal DNA after ensilaging by 93.7% and 95.3% respectively in comparison to control. Total lactobacillus content in the silage was also determined and results showed a high DNA content of lactic acid bacteria in L1a samples (0.00468 ng) followed by S1a R samples (0.00245 ng) when compared to control samples (0.00176 ng). The ability of these strains to reduce fungi population and the same time increase Lactic acid bacteria is an indicator for the post-conservation of silage and can be used for bio preparations.
Influence of «M-Feed» additives in diets on blood indicators of broiler chicken CROSS-308
Authors: Kiseleva Kristina Valerievna , Kistina Anna Aleksandrovna
Published: February 2022

The article presents materials on the study of the effect of the new feed additive "M-Feed" in broiler chickens' diets on the blood composition. It was found that the use of the feed additive "M-Feed" in the composition of broiler chicken feed at the age of 0 to 30 days in the amount of 250 mg per 100 g of feed, and from 31 to 41 days in the amount of 100 mg / 100 g of compound feed, with the cellular method of growing, improves the blood composition and health of broilers.
Effective solutions for automation of localized irrigation systems
Authors: Ostrovsky Nikolai Vyacheslavovich , Vanja Vladimir  Vladimirovich , Samoilyukov Yuri Nikolaevich , Bandurin Mikhail Aleksandrovich , Degtyareva Elena Vladimirovna
Published: February 2022

The automation of the process of irrigation of agricultural and non-agricultural landscapes and objects is a guarantee of achieving a production or design goal. Today, microcontrollers are in use to control the automated irrigation. Freely used universal microcontroller platforms are widely available. Effective adaptation of this equipment to the management of irrigation systems is possible due to the open-source software. It was investigated and confirmed that the technical parameters of universal microcontroller platforms correspond to the system requirements and structure of localized irrigation systems. The economic efficiency of using universal microcontroller platforms for the automation of localized irrigation systems is shown.
Water regime of ordinary chernozem in the cultivation of sunflower in the Volga region
Authors: Goryanin Oleg Ivanovich , Dzhangabaev Baurzhan Zhunuzovich
Published: February 2022

The results of research on the study of five variants of sunflower cultivated according to the ExpressSun ™ production system (the predecessor of barley) on ordinary chernozem for 2013-2020 in the Middle Volga region are presented. The purpose of the research is to identify the optimal water regime of the soil with various technologies for growing sunflower in the arid conditions of the Volga region. It was found that the variants with deep non-tillage tillage, in comparison with the traditional technology, to the appearance of sunflower seedlings on average over the years of research provide an increase in the reserves of productive moisture by 7.4-14.3 mm (3.8-8.0 %). The advantage in moisture reserves was established in all layers of the soil and ranged from 2.6 to 20.0 %. The reserves of productive moisture during the sunflower germination period on the variants without the use of complex mineral fertilizers significantly depended on the amount of liquid precipitation for the non-growing period (September-April) preceding the sunflower sowing (r=0,84-92**). The use of fertilizer systems in crop rotation reduced the dependence of spring reserves of productive moisture on the conditions of humidification in the autumn-spring period to 5 % of the significance level (r=0.78*-0.82*). The use of complex fertilizers contributed to a more rational consumption of moisture per unit of production with resource-saving and traditional technologies, compared with other options by 6.2-21.2 %, up to 1075.9-1084.7 m3/ha. The highest conditional net income was established against the intensive background of resource-saving technology – 27422.2 rubles/ha, the maximum profitability for deep loosening of the soil with the use of a biological product – 253.5 %. Based on the obtained data, a low-cost sunflower cultivation technology has been developed, which provides the most rational moisture consumption and the greatest efficiency.
Analysis of the source material for the selection of lotus corniculatus in the conditions of the Non-chernozem region of Russia
Authors: Ivanova Svetlana Vasilievna , Kurdakova Olga Vasilievna
Published: February 2022

The article presents the results of testing 16 varieties of lotus corniculatus in comparison with the Smolensky 1 standard. The experience was laid in 2016, the yield of air-dry matter 2017-2020 was taken into account. The best in terms of hydrothermal coefficient (GTC) were 2018 with GTC=1.4 and 2019 with GTC=1.8. The analysis of the indicators of air-dry matter yield, ecological plasticity (bi), stability (Si2), stress resistance (Ymin - Ymax), genetic flexibility ((Ymax+Ymin)/2), yield span (d) was carried out. Favorable conditions for crop formation were formed in years with a positive value of the environmental conditions index (Ij). These are 2018 Ij=2.29 and 2019 Ij=1.15. The largest collection of air-dry mass of lotus corniculatus for the entire period gave the sample E-25 (52.2 t / ha) this is 45.8% higher than the variety Smolensky 1, E-47 with 46.3 t / ha by 29.3%, E-49 with 46.2 t/ha by 29% and E-50 with 45.1 t/ha by 26%; the average yield of air-dry matter in these samples also exceeded the standard by 44-25.6%. The most plastic samples were E-24 (bi=1.59), E-19 (bi=1.29), E-50 (bi=1.24), E-49 (bi=1.23). The most stable samples were E-47 (Si2 =0.1), E-50 (Si2=0.3), E-12 and E-4(Si2=0.6); unstable samples were E – 10 (Si2=10.0) and E-39 (Si2=8.7). Stress resistance is best in E-12 (Ymin-Ymax=-2.54) and E-9 (Ymin - Ymax=-4.92); worst in E-24(Ymin - Ymax=-9.56). Maximum genetic flexibility (Ymax+Ymin)/2 had cultivars E-25 (12.77), E-10 (11.73), E-49 (11.54). The lowest yield range (d) in E-12 is 24.68 %, the highest in E – 24 is 60.89 %.
Investigation of the effect of silicon on the biometrics of spring wheat seedlings
Authors: Smirnova Yulia Dmitrievna , Rabinovich Galina Yurievna
Published: February 2022

In the last decade, the main functions of silicon in plant growing have been actively discussed - strengthening the physicochemical properties and biochemical processes in plants, protecting plants from biotic and abiotic stresses. The aim of this work is to study the effect of a silicon-containing preparation on the biometric parameters of spring wheat grown under abiotic stress. A silicon-containing preparation, designated BoHum-S, was obtained on the basis of a humic preparation BoHum and a water-soluble silicon salt - sodium metasilicate, with a SiO2 content of 28%. A study was conducted of the preparation containing 0.05, 0.1, 0.5 and 2.5% of the mass. concentration for SiO2. BoHum-S was used for pre-sowing seed treatment and spraying of spring wheat seedlings against the background of modeling two types of water stress: drought and waterlogging. The greatest effect of the drug on the biometric parameters of spring wheat was observed when using BoHum-S with a silicon oxide content of 0.1%, the effect of which should be considered a synergistic effect, composed of the properties of humic acids and silicon. In general, the advantage of spraying seedlings over soaking seeds was revealed, expressed in a higher frequency of reliable increases in biometric indicators of wheat seedlings.
Analytical studies of technical parameters of self-propelled sprayers
Authors: Demin Evgeny Evgenievich , Startsev Alexander Sergeevich , Protasov Andrey Anatolievich , Shardina Galina Evgenievna , Nesterov Evgeny Sergeevich
Published: February 2022

As a result of studies of the values of the technical characteristics of self-propelled rod sprayers of domestic and foreign models and modifications, the values of the mass, power of the installed engine and the volume of the working fluid tank are analyzed. Their correlation and dependence fields are obtained. The theoretical and empirical laws of the distribution series, the mathematical expectation, the standard deviation, the coefficient of variation, the confidence interval of the average value, the 95% range of the distribution of the values of the volume of the tank of the working fluid of the sprayers are determined.
Litter processing technology into organic fertilizer
Authors: Khmyrov Viktor Dmitrievich , Guryanov Dmitry Valerievich , Kudenko Vyacheslav Borisovich
Published: February 2022

The article presents the designs of a loader agitator, a shredder and an aerator of burts for the preparation of high-quality organic fertilizer from manure. The loader-agitator destroys the manure layer when keeping chickens on the floor and loads it into a spreader-shredder, which grinds the manure and puts it in a ground trench with a height of 1.5 meters and a width of 2 meters. In the ground trench, the litter is saturated with air for the intensity of the biological process, and aeration needle electrodes create a DC electric field and hygienize the organic mass after 5 days, a high-quality organic fertilizer is obtained.
Evaluation of prospective soybean samples by physiological and biochemical signs of dry resistance
Authors: Kazarina Alexandra Vladimirovna , Atakova Elena Alexandrovna , Kincharova Marina Nikolaevna
Published: February 2022

Methods for early diagnosis of drought tolerance in leguminous crops, based on the screening of physiological indices of resistance to stress, are of great importance for the accelerated selection of drought tolerant soybean lines. On the basis of the Volga NIISS, laboratory experiments were carried out to assess the physiological and biochemical parameters of drought re-sistance of seedlings of promising soybean samples under conditions of osmotic stress. As a result of studying the indicators of seed germination in a sucrose solution and morphophysiological  assessment of seedlings of soybean varieties, samples with a high starting growth rate were identified - 156/2014, D-150 and variety Yuzhanka. A strong direct relationship was established between the indices of seed germination on sucrose solution and the index of root length (r = 0.98), between the index of root length and the dynamics of accumulation of free proline under the influence of a stress factor (r = 0.76). According to a comprehensive assessment of the studied samples, it was found that the greatest decrease in growth processes and the smallest accumulation of free proline were noted in samples VNIIOZ-796/11 and Velichava / 2009. Samples D-150, 156/2014 and variety Yuzhanka were identified as the most drought-resistant.
Influence of agroecological conditions on the productivity of zone landscapes of the Saratov region
Authors: Nesvetaev Mikhail Yuriyevich , Gubarev Denis Ivanovich , Demakina Irina Igorevna , Tarbaev Vladimir Alexandrovich , Denisov Konstantin Evgenievich
Published: February 2022

The article reveals the features of the watershed and slope natural boundaries of the northern, typical and arid steppe. For the soils of test sites   No. 5 (Saratov) and No. 9 (Krasny Kut), a higher content of mobile forms of phosphorus and potassium was revealed on the northern slopes, in contrast to the southern slopes. The soils of the northern slopes of test sites No. 1 (Arkadak) is less supplied with macronutrients than soils of southern expositions. Plakor soils on test sites No. 1, No. 5 are better than slope tracts provided with K2O, but worse than P2O5. Soil productivity of watershed types of tracts of test sites No. 1, No. 5 are above the slopes. Northern slopes of test sites No. 1 are less productive than the southern ones. On test sites No. 5, on the contrary, the northern slopes are more productive than the southern ones. On test sites No. 9 southern slopes are more productive than watersheds and northern slopes.  The dependence of the SCC in the phase of tube-heading and the future harvest was revealed. An increase in the hydrothermal index from 0.3 to 0.45 in this phase of wheat development under conditions of the test sites No. 5 gave a 2-fold increase in yield. The quality of spring soft wheat grown on the slopes of the southern exposure is higher than on the watersheds and slopes of the northern exposure for all objects of study.
Morpho-anatomical and physiological-biochemical parameters of buckwheat seeds in connection with selection for high and high-quality yield
Authors: Amelin Alexander Vasilyevich , Fesenko Alexey Nikolaevich , Zaikin Valery Vasilyevich , Chekalin Evgeny Ivanovich , Mazalov Viktor Ivanovich
Published: February 2022

The article presents the results of many years of research on the morpho-anatomical and physiological-biochemical parameters of seeds in buckwheat cultivars of different breeding periods. It is noted that as a result of selection, the increase in crop yield is achieved both by enlarging the seeds and increasing their number. The correlation coefficient between the yield and the weight of 1000 seeds was +0.89, and with the number of seeds it was + 0.78. In modern varieties, compared with local populations, the geometric parameters of the elements of the seed anatomy increased on average: the cross-sectional area - by 19.6%, the area of the endosperm-by 16.3%, the area of the embryo – by 24.5%. The embryo became both longer (by an average of 14.7%) and thicker – by an average of 11.4%. The increase in the amount of spare substances and the capacity of the seed embryo in modern varieties made it possible for plants to develop more steadily and efficiently at the initial stages of organogenesis. The conclusion is made about the urgent need to adjust the current direction in the selection of buckwheat in the direction of optimizing the ratio between grain size, nutritional and technological value in seeds, taking into account the physiological role of the trait in the adaptive and productive process of plants. A promising variety of buckwheat should be characterized by the following parameters of grain quality and processability: weight of 1000 seeds – 30-31 g; film content – 19-20%; yield of cereals – 75%; protein content – 15.0-15.5%; content of heavy metals-below the permissible norm. It is quite possible to achieve these parameters by selection, since the gene pool of the crop is characterized by a large polymorphism of grain quality indicators.