bluuebunny/crossref_metadata_2025 huggingface dataset:
Eğilme Etkisi Altındaki I Kirişlerde Yanal Yükün Taşıma Kapasitesine Etkisi
Authors: GÜVEN Sena , ÇELİK Devran
Published: August 2021

Taşıyıcı sistemlerde malzeme olarak yapısal çeliğin tercih edilmesinin sebeplerinden biri de yüksek dayanım ve sünek davranış sergilemesindendir. Çelik yapı elemanlarının şekil değiştirme kapasitesinin yüksek olması ve sünek davranış sergileyebiliyor olması uygun tasarıma bağlıdır. Fakat yapıya tasarım dışı yük gelmesi, çelik yapı elemanlarının taşıma kapasitesinin aşılması halinde, stabilite problemlerine neden olmaktadır. Bu durum özellikle çelik yapılarda kirişlerin kuvvetli eksen tarafında eğilme etkisi altında iken yanal yük alması şeklinde gözlenir. Bu stabilite problemi önlenmez ise sistem plastik deformasyona maruz kalıp göçme durumuna geçerek yanal olarak burkulacaktır. Bu durumda, yüksek süneklik özelliklerine sahip çelik taşıyıcı sistemin gevrek davranış göstermesinin önünü açacaktır. Bu araştırma makalesi, eğilme etkisi altında bulanan I kirişte yanal yükün kiriş kapasitesine etkisini incelemek amacıyla yapılmıştır. Çalışmada farklı yüklerin etkisi altında bırakılan, farklı kesit ve açıklıklarda kirişler kullanılmıştır. Bu bağlamda, yanal yükün kiriş kapasitesine etkisinin ortaya koyulması amacıyla Ansys Workbench sonlu elemanlar programında 19 farklı modelin 11 farklı artan yük altında analizleri yapılmış ve elde edilen sonuçlar karşılaştırmalı olarak sunulmuştur.
La violencia del machismo en Adiós, Tomasa de Geney Beltrán Félix
Authors: Torres Torija Mónica
Published: August 2021

Geney Beltrán Félix propone en Adiós, Tomasa una revisión a los patrones de violencia que son inculcados desde la niñez y que afectan a los seres más vulnerables como las mujeres y los niños. En un área serrana, donde las comunicaciones y la presencia del gobierno se caracterizan por su ausencia, impera la proliferación de actividades ilícitas que están promovidas por la presencia del narcotráfico y la corrupción del Estado, lo que va convirtiendo el Triángulo Dorado mexicano en un espacio geográfico donde abundan experiencias trágicas provocadas por las violaciones, los crímenes y los actos delictivos de esta zona de clivaje. En este trabajo se analizará la irrupción de la violencia en el seno familiar y social que prevalece en el pueblo de Chapotán derivado del machismo cultural y que, junto a las amenazas intimidantes del crimen organizado, trastocan la vida de las personas que intentan subsistir pese al peligro y de otros que desisten y se aferran al sueño americano optando por la aventura migrante. El elemento autobiográfico y la focalización infantil serán los recursos con los cuales el autor nos sumergirá en un México con un escenario crudo y grotesco de la realidad contemporánea que finca su territorio imaginario sobre el desasosiego y la violencia de la sociedad mostrando cómo la violencia y el odio generado por el negocio del narco han cambiado gradualmente la dinámica social del norte del país.
Creación y memoria
Authors: Aguirre Coral
Published: August 2021

Ensayo sobre la relación entre creación y la memoria
La voz y la armadura. Revisión de Armas y Letras
Authors: Torres Vázquez Ana Patricia
Published: August 2021

En esta nota se hace una revisión de la historia de la revista Armas y Letras
Reseña de Ahora colecciono miradas
Authors: Martínez Quintanilla María Fernanda
Published: August 2021

Reseña del ensayo Ahora colecciono miradas..., de Víctor Barrera Enderle
HYPERSPECTRAL IMAGE BAND SELECTION BASED ON SUBSPACE CLUSTERING
Authors: ZHENG Zhi-jun , PENG Yan-bin
Published: August 2021

Aiming at the problems in hyperspectral image classification, such as high dimension, small sample and large computation time, this paper proposes a band selection method based on subspace clustering, and applies it to hyperspectral image land cover classification. This method considers each band image as a feature vector, clustering band images using subspace clustering method. After that, a representative band is selected from each cluster. Finally feature vector is formed on behalf of the representative bands, which completes the dimension reduction of hyperspectral data. SVM classifier is used to classify the new generated sample points. Experimental data show that compared with other methods, the new method effectively improves the accuracy of land cover recognition.
ESTUDO DA VIABILIDADE DE FABRICAÇÃO DE FILAMENTOS COMPÓSITOS SUSTENTÁVEIS PARA IMPRESSÃO 3D A PARTIR DE UMA MATRIZ PLA REFORÇADA COM RESÍDUOS DE FIBRAS DE MADEIRA
Authors: Lauxen Spohr Daniel , Lucca Sánchez Felipe Antônio , Canal Marques André
Published: August 2021

Processos tecnológicos de manufatura aditiva, como a de impressão 3D, vem permitindo transcender os limites do desenvolvimento dos produtos atuais a um custo menor em de forma mais rápida. Nos últimos anos a impressão 3D se tornou mais fácil de usar e mais barata, tornando acessível para diferentes mercados. A literatura vem demonstrando que há uma grande demanda para conceber materiais mais sustentáveis para fabricação de bens de consumo por impressão 3D o que inclui, por exemplo, a utilização de resíduos de processos industriais da indústria moveleira como pós e serragens incorporados a matrizes poliméricas. Neste trabalho, foi utilizada a combinação de PLA com resíduos de pó de madeira com objetivo de criar um filamento com aspecto de madeira, com propriedades mecânicas melhores do que o filamento sem a adição da carga e assim mais sustentável.  Para isto, fez-se primeiramente a caracterização do pó de madeira para determinar os melhores parâmetros de processo e após foram determinadas três formulações diferentes e extrudadas para a produção dos filamentos. Ao final foram analisadas quanto a suas propriedades de interesse.
INICIATIVAS DE COLETA SELETIVA E LOGÍSTICA REVERSA EM PORTO ALEGRE COMO BASE PARA ECONOMIA CIRCULAR
Authors: Hoffmann Anelise Todeschini , Jacques Jocelise Jacques de
Published: August 2021

A economia circular tem como base o retorno de materiais ao ciclo produtivo e isto só é possível quando há coleta seletiva e logística reversa. Desde antes do conceito de economia circular se tornar popular na pauta ambiental já se reconhecia que uma das estratégias mais efetivas para a diminuição dos resíduos é o controle do material descartado através de sua coleta, desmonte e processamento para que retorne como insumo no processo industrial. Com a aprovação da Lei Federal 12.305, fabricantes, importadores, distribuidores e comerciantes são corresponsáveis pelos resíduos sólidos e rejeitos envolvidos em todo o processo, o que traz incentivos à logística reversa. Neste contexto, apresentamos a situação atual da coleta seletiva no país e em Porto Alegre (considerada vanguardista no Brasil), e as iniciativas de logística reversa. Este levantamento mostrou que, mesmo depois de mais de 30 anos de coleta seletiva, a cidade ainda necessita de campanhas de conscientização da população em gerar menos resíduo e destiná-lo corretamente. Mesmo extremamente necessário e fundamental para a abordagem da economia circular, é necessário ainda muito investimento em tecnologia, educação e gestão, para que os benefícios da aplicação da logística reversa, como redução de custos com matéria-prima e promoção da responsabilidade socioambiental possam ser colhidos no Brasil.
MATERIAIS VIVOS, O CASO DA CELULOSE BACTERIANA: REVISÃO BIBLIOGRÁFICA DA APLICAÇÃO NO DESIGN INDUSTRIAL, ARQUITETURA E MODA
Authors: Do Nascimento Elisa Strobel , Lau Gislaine Maria , Ishiy Felipe De Carvalho , Heemann Adriano
Published: August 2021

O Design com materiais vivos, em que participam outros organismos na materialização dos artefatos, traz novas possibilidades e desafios teóricos e práticos. No recorte do design envolvendo bactérias, esta pesquisa tem como objetivo levantar e mapear as perspectivas e aplicações da celulose bacteriana no design industrial, arquitetura e moda. O procedimento metodológico é a revisão sistemática que resultou na análise de 27 trabalhos acadêmicos e 16 depósitos de patentes nacionais e internacionais. Como resultado sumarizam-se as aplicações relatadas e prospectadas. Os destaques estão nas aplicações têxteis e nos processos de cultivo, conformação e acabamentos. São relatadas as dificuldades e discutidas oportunidades para os designers com estes materiais.
Does Race Have a Role in The Effect of Fingerprint on Gender?
Authors: AVNİOĞLU Seda , DİKİCİ Rumeysa , YILMAZ Halil
Published: August 2021

Aim: Fingerprint is one of the personal and reliable physical features. The fingerprint has an important role in forensics, and it is used in the detection of criminals and identity checks. Studies on different races have been conducted, but no interracial comparison has been found in the literature. In this study, we have investigated the effect of race on finger ridge using the same method on 5 different races.Methods: In our study, the right thumb prints of 355 (148 female, 207 male) students aged 17-25 years in our school were taken with an ink pad (stamp) and recorded along with their ages, sexes, and races. Data were analysed by sex and race.Results: In the comparison by sex, the finger ridge counts of male (11.94±2.08) and female (12.76±2.02) participants were found to be statistically significantly different (p<0.001). Participants were classified as Turkish, Arab, Russian, Turkmen, and African. The difference in finger ridge counts between Turkish-Africans was found to be statistically significant in the comparison by races (p<0.05).Conclusion: Comparison of finger ridge counts by sex has been studied on many races, but each study has been conducted with a different method. In our study, we aimed to contribute to the literature by examining how the finger ridge counts of men and women differ in 5 different races by using the same method. Although the data we obtained are compatible with the literature for the Turkish race, there are differences for other races.
Overcoming the procedures for obtaining a location permit for the Podravska high-speed road project
Authors: Bašić Marija  , Kranjčić Nikola  , Jug Jasmin  , Đurin Bojan
Published: August 2021

Roads are important infrastructure facilities that enable traffic accessibility, i.e. they improve the quality of transport communication between people, goods and innovations. The Podravina high-speed road project was designed with the aim of developing Podravina and Slavonia and enabling a better connection between them and the rest of Croatia. Road construction is a complex process that requires a location permit before construction begins. This paper is written with the aim of presenting in detail the process of obtaining a location permit, which is preceded by obligatory preliminary work. Its complexity depends on the type of a road, its purpose and characteristics of the area through which a planned road passes. The Podravina high-speed road is the largest infrastructure project in that part of Croatia and therefore detailed preliminary work is required. This paper describes some types of preliminary work which include geological, geomechanical and climatic tests. The paper presents a project justification study, an environmental impact study, an environmental impact study, a construction and a technical study as well as a spatial transport analysis. Based on the chosen Podravina high-speed road route, a general design was created by using a road design software program “Platea”.
New dendroclimatological research in oak, S (Quercus Frainetto Ten.) forestry in Šumadija-Region- (Central Serbia) as a basis for climate change monitoring
Authors: Severin Šikanja  , Nevena Milovanović
Published: August 2021

In this work present study to describe the survey of climatic change in the case in Šumadija-Central Serbia. Climate change due to a fragile ecosystem in semi-arid, and arid region such as Serbia is one of the most challenging climatological and hydrological problems. Dendrochronology, wich uses tree rings to their exact year of formation to analyse temporal and spatial patterns of processes in the physical and cultural sciences, can be used to evaluate the effects of climate change. In this study, the effects of climate change werw simulated using dendrochronology (tree rings) and an artificial neural network (ANN) for the period from 1900—2015. The present study was executed using the (Quercus frainetto Ten.). Tree rings width, temperature and precipitation were the input parameters for the study, and climate change parameters were the outputs. After the training process, the model was verified. The verified network and tree rings were used to simulate climatic parameter changes during the past times. The results showed that the integration of dendroclimatology and an ANN renders a high degree of accuracy and efficiency in the simulation of climatic change. The results showed that the climatic of the study area changed from semiarid, to arid, and its annual precipitation decreased significantly.
Bioanalytical method development and validation of UV spectrophotometric method for estimation of Bumetanide spiked in human urine
Authors: Bhavya sri Khagga  , Kavya.Parelli
Published: August 2021

The main purpose of this study was to develop a simple precise, rapid and accurate UV-visible spectrophotometric method for determination of Bumetanide in spiked human urine by extracting the Bumetanide from spiked human urine using ethyl acetate after extraction it was scanned between 200-400nm by using UV detector and its absorbance maxima was found to be 222nm.The calibration curve was linear in the range of 1-17 µg/ml. .the recovery and assay studies of bumetanide were within 93-94.85% indicating that the proposed method can be estimation of bumetanide.
Prevalence and genotypic characteristics of Panton-Valentine Leukocidin-producing Staphylococcus aureus isolates obtained in Jos, North Central Nigeria
Authors: Unyime C. Essien  , Samar S. Boswihi  , Nneka R. Agbakoba  , Edet E. Udo
Published: August 2021

Background: Staphylococcus aureus is an opportunistic pathogen that colonizes and causes infections in humans. Panton Valentine Leukocidin (PVL) is a cytolytic toxin produced by some strains of S. aureus and are mostly associated with skin and soft tissue infections and necrotizing pneumonia. Aim: To investigate the prevalence and genotypic characteristics of PVL-positive S. aureus strains cultured from patients in three tertiary hospitals in Jos, Nigeria. Methods: Two hundred and fourteen clinical S. aureus isolates were obtained from three tertiary hospitals in Jos. Polymerase chain reaction was used to detect lukSF-PV gene that encodes PVL, and sensitivity to antimicrobial agents was performed on PVL-positive S. aureus. Genotypic characteristics of the PVL-positive S. aureus was determined by spa typing and multilocus sequence typing (MLST). Results: The genes for PVL were detected in 67/214 (31.3%) of S. aureus isolates. Majority of the PVL-positive isolates were obtained from wound (n=37; 55.2%), blood (n=11; 16.4%) and urine (n=10; 14.9). Most of PVL-positive isolates (n=58; 34.7%) were methicillin sensitive S. aureus (MSSA) while nine isolates (19.1%) were methicillin resistant S. aureus (MRSA). Spa typing identified 14 different spa types, dominated by t355 (n=33; 49.3%), followed by t174 (n=7; 10.4%), t019 and t159 (n=5; 7.5%). MLST revealed six sequence types (ST) namely, ST152 (n=35), ST121 (n=9), ST1 (n=8), ST30 (n=8), ST772 (n=6) and ST15 (N=1). Conclusion: This study revealed that 31.3% of S. aureus isolated in Jos hospitals carried genes for PVL, belonged to six sequence types and 14 spa types with t355-ST152-MSSA as the dominant genotype.
Penanaman Pendidikan Karakter melalui Pemecahan Masalah Matematika
Authors: Novianti Dwi Erna
Published: August 2021

Abstract  The development of technology which is increasingly rapid nowadays certainly has a positive and negative impact on student development, especially on character development. The role of integration character education is very needed as an effort to overcome this. So far, character education is identical to the subject of Religion or Pancasila Education only. However, the development of time, the integratio of character education can be integrated with the entire learning process, including the learning process of mathematics. Teachers play an important role in this. Teachers can become facilitators and role models in providing role models in behavior, attitudes, and speech related to cultivating student character. Teachers can also develop and instill character education in the learning process from the planning stage to the evaluation stage. The use of models, strategies, and learning approaches can help teachers instill character values. One approach that can be used is to use mathematic problem solving which includes several steps to solve it, namely (1) understanding the problem, (2) planning for problem solving, (3) solving results and (4) checking the answer again. At each completion step contains character values that can be developed, including values of interest, hard work, independence, negotiation and persistence.Keyword: Character Education, Mathematicl Problem SolvingAbstrakPerkembangan teknologi yang semakin pesat pada masa sekarang ini tentunya mempunyai dampak positif dan negatif terhadap perkembangan siswa terutama terhadap perkembangan karakter. Peran pengintegrasian pendidikan karakter sangat diperlukan sebagai salah satu upaya mengatasi hal tersebut. Selama ini, pendidikan karakter identik dengan mata pelajaran Agama atau Pendidikan Pancasila saja. Akan tetapi seiring perkembangan waktu, penanaman pendidikan karakter dapat diintegrasikan dengan seluruh proses pembelajaran tidak terkecuali proses pembelajaran matematika. Guru mempunyai peran penting dalam hal ini. Guru dapat menjadi fasilitator dan sebagai role model dalam memberikan tauladan dalam perilaku, sikap, dan ucapan terkkait penanaman karakter siswa. Guru juga dapat mengembangkan dan menannamkan pendidikan karakter dalam proses kegiatan pembelajaran mulai dari tahap perencenaan sampai dengan tahap evaluasi. Penggunaan model, startegi, dan pendekatan pembelajaran dapat membantu guru dalam menanamkan nilai - nilai karakter. Salah satu pendekatan yang dapat digunakan adalah dengan menggunakan pemecahan masalah matematika yang didalamnya memuat beberapa langkah penyelesaian yaitu (1) pemahaman masalah, (2) perencenaan penyelesaian masalah, (3) pelaksanaan rencana penyelesaian dan (4) mengecek kembali jawaban. Pada setiap langkah penyelesaian ini memuat nilai karakter yang dapat dikembangkan, diantaranya nilai ketertarikan minat, kerja keras, kemandirian, negoisasi dan kegigihan. Kata kunci: Pendidikan Karakter, Pemecahan Masalah Matematika
Peningkatan Hasil Belajar Siswa pada Mata Pelajaran Pkn dengan Pembelajaran Direct Instruction berbantukan Google Classroom
Authors: Windu I Gusti Ngurah Adhi
Published: August 2021

Abstract: Civics is a compulsory subject especially for senior high school students. Therefore, the students must have complete learning in each of the existing basic competencies. This study aims to improve students' learning outcomes in civics subject that implements direct instruction using google classroom. This study is Classroom Action Research with 34 students as the research subjects. The research instruments are test questions, interview guidelines, and observation guidelines. The data is collected using tests, observations, and interviews. The data is validated using triangulation techniques of theory and data. The technique of analysis data uses descriptive comparative technique. The result of study shows that there is an improvement of students' learning outcomes starting from pre-action activity to cycle II. It can be viewed from the percentages of classical completeness and success. This study concludes that students' learning outcomes in each cycle have improved and 75% of students have obtained scores above 70 (minimum completeness criteria of civics). Keywords: direct instruction, google classroom, learning outcomes, Civics subject  Abstrak: Mata pelajaran Pendidikan Pancasila dan Kewarganegaaan menjadi matapelajaran wajib di jenjang sekolah, khususnya di sekolah menengah atas. Untuk itu, siswa harus memiliki ketuntasan belajar pada setiap kompetensi dasar yang ada. Tujuan penelitian ini adalah untuk meningkatkan hasil belajar siswa pada mata pelajaran PPkn dengan penerapan model pembelajaran direct instruction berbantukan google classroom. Penelitian ini merupakan Penelitian Tindakan Kelas dengan subjek sebanyak 34 siswa. Instrumen penelitian menggunakan soal tes, pedoman wawancara, dan pedoman observasi. Teknik pengumpulan data menggunakan metode tes, observasi, dan wawancara. Data penelitian ini divalidasi dengan teknik triangulasi teori dan data. Teknik analisis data menggunakan teknik deksriptif komparatif. Hasil penelitian menunjukkan terdapat peningkatan hasil belajar siswa mulai dari kegiatan pratindakan sampai siklus II. Peningkatan hasil belajar tersebut dapat dilihat dari persentase ketuntasan klasikal dan persentase keberhasilan. Simpulan penelitian ini adalah hasil belajar siswa pada setiap siklus mengalami peningkatan dan sebanyak 75% siswa sudah mendapat nilai di atas 70 (KKM mata pelarajan PPKn). Kata Kunci: direct instruction, google classroom, hasil belajar, mata pelajaran PPKn.
Multiblock methods in Analytical Chemistry
Authors: Rutledge Douglas
Published: August 2021

Chemometrics, and multivariate data analysis in particular, has become a significant component of Analytical Chemistry. This is because of the need to have mathematical methods capable of extracting the pertinent information from the ever-increasing amounts of data generated by modern instruments. Usually, these multivariate data analysis methods are concerned with the exploratory analysis of a single data matrix, as in PCA, or with relating one explanatory matrix to another descriptive matrix, as in regression methods such as PCR and PLS, or discriminant methods, such as FDA and PLS-DA.
Kemampuan Berpikir Kreatif Matematis Menggunakan Model Pembelajaran Cooperative Script Berbantuan Aplikasi Geogebra di SMA Negeri 1 Rantau Utara
Authors: Purba Monica Clara , Harahap Nurlina Ariani
Published: August 2021

Tujuan penelitian ini untuk melihat kemampuan berfikir kreatif matematis menggunakan model pembelajaran Cooperative Script berbantuan aplikasi Geogebra. Metode digunakan penelitian ini adalah metode eksperimen. Disain penelitian ini merupakan desain kelompok control pretes-protes (pretest- posttest control grup design) melibatkan dua kelompok. Peneliti menggunakan metode penelitian kuantitatif menggunakan metode pembelajaran Coperative Script, populasi penelitian ini adalah siswa kelas XI IPA SMA Negeri 1 Rantau Utara tahun ajaran 2020/2021. Teknik digunakan adalah acak menurut kelas, memilih 2 kelas, yaitu kelas eksperimen dan kelas kontrol. Kelas XI IPA2 merupakan kelas eksperimen berjumlah 36 siswa dan kelas XI IPA1 kelas kontrol berjumlah 36 siswa. Diketahui bahwa besar pengaruh model pembelajaran Cooperative Script dengan aplikasi Geogebra terhadap kemampuan berfikir kreatif matematis siswa adalah sebesar 34.17%, sedangkan metode belajar konvensional hanya berpengaruh sebesar 12.92% disimpulkan ada perbedaan hasil belajar siswa terhadap model pembelajaran Cooperative Script dengan aplikasi Geogebra dan konvensional dengan perbedaan sebesar 21.25%.
Eksplorasi Etnomatematika pada Masjid Al-Alam Marunda Ditinjau dari Segi Geometri
Authors: Faturrahman Muhammad , Soro Slamet
Published: August 2021

Pembelajaran matematika di zaman sekarang lebih menekankan pada aspek pemahaman konsep matematis untuk menyelesaikan masalah matematika. Etnomatematika dapat menjadi pendekatan pembelajaran matematika untuk memfasilitasi kemampuan pemahaman konsep matematis. Konsep-konsep geometri pada bentuk bangunan bersejarah dapat menjadi pengamatan yang dihasilkan oleh budaya. Setiap daerah memiliki bangunan bersejarah masing-masing. Di Jakarta terdapat bangunan bersejarah yaitu Masjid Al-Alam Marunda yang dibangun sejak tahun 1900 masehi. Tujuan penelitian ini adalah untuk mengeksplorasi konsep geometri yang terdapat pada Masjid Al-Alam Marunda, sehingga dapat dijadikan sumber belajar dalam pembelajaran matematika. Jenis penelitian ini adalah penelitian kualitatif dengan pendekatan etnografi. Pengumpulan data dilakukan dengan cara metode observasi, wawancara, studi literatur, dokumentasi, dan angket. Instrumen yang digunakan berupa pedoman observasi, pedoman wawancara, catatan harian, dan angket, kemudian dapat disimpulkan bahwa konsep geometri yang terdapat pada Masjid Al-Alam Marunda adalah konsep bangun datar, bangun ruang, dan konsep transformasi refleksi. Etnomatematika dapat memuat aspek pemahaman konsep matematis dengan objek yang dilihat secara nyata.
Pengaruh Penggunaan Gadget dan Peran Orang Tua Terhadap Hasil Belajar Mahasiswa di Masa Covid-19
Authors: Seto Stefania Baptis , Wondo Maria Trisna Sero , Mei Maria Fatima
Published: August 2021

Tujuan penelitian ini adalah untuk mengetahui adanya pengaruh penggunaan gadget dan peran orang tua terhadap hasil belajar mahasiswa pada mata kuliah assesmen pembelajaran matematika di masa covid-19. Jenis penelitian yang digunakan adalah penelitian kuantitatif dengan pendekatan deskriptif. Sampel dalam penelitian ini berjumlah 30 mahasiswa dan orang tua mahasiswa. Teknik pengumpulan data menggunakan angket dan lembar observasi. Teknik analisis yang digunakan adalah analisis regresi linear berganda. Sebelum melakukan uji hipotesis, dilakukan uji prasayarat yaitu uji normalitas dan uji multikolinearitas. Hasil penelitian menunjukkan bahwa (1)  penggunaan gadget berpengaruh secara parsial dan signifikan terhadap hasil belajar mahasiswa dengan nilai sig. 0.00 < 0.05 dan nilai thit 6.644 > ttabel 2.048, (2) peran orang tua berpengaruh secara parsial dan signifikan terhadap hasil belajar mahasiswa dengan nilai sig. 0.040 < 0.05 dan nilai thit 2.153 > ttabel 2.048, (3) penggunaan gadget dan peran orang tua secara bersama-sama berpengaruh positif secara simultan terhadap hasil belajar mahasiswa dengan nilai Fhit 28.159 lebih besar dari Ftabel 3.35. berdasarkan hasil penelitian, dapat disimpulkan bahwa ada pengaruh penggunaan gadget dan peran orang tua terhadap hasil belajar mahasiswa.
Analisis Kesalahan Siswa Kelas VII dalam Menyelesaikan Soal Himpunan Ditinjau dari Gaya Kognitif
Authors: Utamo Natasya Yoesepa Dwi , Sukirwan Sukirwan , Setiani Yani
Published: August 2021

Penelitian ini bertujuan untuk mengetahui kesalahan siswa dalam menyelesaikan soal himpunan dilihat dari gaya kognitif siswa. Metode yang digunakan adalah metode deskriptif dengan pendekatan kualitatif, pengambilan sampel dilakukan dengan Teknik purposive sampling. Penelitian dilakukan pada siswa kelas VII SMP DAAR EL-ROFA. Intrumen dalam penelitian ini diantaranya tes GEFT, soal Himpunan dan wawancara. Teknik pengumpulan data yang digunakan yaitu dokumentasi, tes, dan wawancara. Keabsahan data menggunakan metode triangulasi. Teknik analisis data menggunakan reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukan bahwa kesalahan siswa tipe field independent terdapan pada tahap merencanakan penyelesaian masalah, melaksanakan rencana penyelesaian masalah, dan melihat kembali. Sedangkan siswa dengan tipe field dependent melakukan kesalahan pada tahap memahami masalah, merencanakan penyelesaian masalah, melaksanakan rencna penyelesaian masalah, dan melihat kembali. Hal tersebut dapat disimpulkan bahwa kesalahan yang dilakukan siswa tipe FI lebih sedikit dibandingkan dengan siswa tipe FD.
Hambatan Epistemologi Peserta Didik dalam Menyelesaikan Aritmatika Sosial Berdasarkan Gaya Belajar dan Perbedaan Gender
Authors: Parawansa Fauziah Ambar , Siswanto Rizki Dwi
Published: August 2021

Penelitian ini bertujuan untuk menganalisis hambatan epistemologi peserta didik dalam menyelesaikan soal aritmatika sosial yang ditinjau dari gaya belajar. Metode penelitian ini termasuk dalam penelitian deskriptif kualitatif. Teknik yang digunakan purposive sampling dengan subjek 6 peserta didik terdiri dari 1 peserta didik laki-laki bergaya belajar visual, 1 peserta didik perempuan bergaya belajar visual, 1 peserta didiki laki-laki bergaya belajar auditorial, 1 peserta didik perempuan bergaya belajar auditorial, 1 peserta didik laki-laki bergaya belajar kinestetik, dan 1 peserta didik perempuan bergaya belajar kinestetik. Instrumen dalam penelitian ini berupa angket gaya belajar dan tes aritmatika sosial. Analisis data pada penelitian ini yaitu kategorisasi dan reduksi data, penyajian data, dan pengambilan kesimpulan. Teknik triangulasi dilakukan dengan melakukan keabsahan data yaitu membandingkan hasil tes aritmatika sosial subjek dengan wawancaranya. Hasil dari penelitian ini adalah subjek bergaya belajar auditorial bergender laki-laki maupun perempuan lebih sedikit mengalami hambatan epistemologi daripada subjek bergaya belajar visual bergender laki-laki maupun perempuan dan subjek bergaya belajar kinestetik bergender laki-laki maupun perempuan. Hambatan epistemologi yang dialami subjek bergender perempuan lebih sedikit daripada subjek bergender laki-laki.
Pengembangan Bahan Ajar Pembelajaran Matematika Realistik Indonesia pada Materi Bangun Datar
Authors: Saputro Ganung Suko , Khusna Hikmatul
Published: August 2021

Penelitian ini dilatarbelakangi karena matematika bersifat abstrak pada penjelasan konsep dan kurang tersedianya bahar ajar tentang PMRI. Peneliti melakukan pengembangan produk buku pembelajaran matematika realistik Indonesia pada bangun datar. Metode yang digunakan ADDIE adalah analysis, design, develop, implementation, dan evaluation. Validasi diperoleh melalui ahli validasi antara lain materi, media, dan guru matematika. Hasil dari penelitian validasi ahli materi memperoleh perhitungan 93,6% berkategori valid tanpa revisi dan validasi ahli media memperoleh perhitungan 79% berkategori valid dengan revisi. Penilaian juga diperoleh dari guru matematika dengan memberi perhitungan 96,66% valid tanpa revisi. Kesimpulannya adalah produk buku pembelajaran matematika realistik Indonesia pada bangun datar valid dan layak digunakan.
Pengembangan Buku Ajar Matematika Berbasis Matematika Terapan Pada Materi Trigonometri untuk Peserta Didik SMK Kelas X
Authors: Anri Miftahul Jannah , Soebagyo Joko
Published: August 2021

Penelitian ini bertujuan untuk mengembangkan buku ajar matematika berbasis matematika terapan pada materi Trigonometri. Metode yang digunakan dalam penelitian ini yaitu metode penelitian dan pengembangan (Research & Development) dengan model pengembangan ADDIE yang melalui beberapa tahap yaitu Analisis, Perancangan, Pengembangan, Implementasi, dan Evaluasi untuk mendapatkan produk layak dan efektif serta dapat digunakan dalam pembelajaran. Teknik pengumpulan data pada penelitian ini ialah melakukan wawancara dan menggunakan angket kepada 2 orang ahli materi dan 2 orang ahli media untuk menguji kelayakan buku ajar, kemudian angket uji coba skala kecil diberikan kepada 4 peserta didik kelas X Teknik Kendaraan Ringan (TKR) SMKN 39 Jakarta, serta dilakukan uji coba skala besar kepada 68 peserta didik kelas X Teknik Kendaraan Ringan (TKR) SMKN 39 Jakarta. Berdasarkan hasil penelitian, buku ajar berbasis matematika terapan pada materi Trigonometri memperoleh penilaian berkriteria sangat baik dengan persentase 92,5% dari ahli materi dan 86,5% dari ahli media. Hasil uji coba skala kecil memperoleh penilaian berkategori sangat baik dengan persentase 85,5% dan 83% dengan berkategori sangat baik saat uji coba skala besar. Sehingga dapat disimpulkan bahwa buku ajar matematika berbasis matematika terapan pada materi Trigonometri layak dan efektif digunakan peserta didik SMK Negeri 39 Jakarta.
Analisis Kesulitan Peserta Didik Kelas VIII dalam Menyelesaikan Soal Sistem Persamaan Linear Dua Variabel (SPLDV) di MTs Atsauri Sindangkerta
Authors: Maryani Ani , Setiawan Wahyu
Published: August 2021

Penelitian ini bertujuan untuk menganalisis kesulitan peserta didik dalam menyelesaikan soal pada materi Sistem Persamaan Linear Dua Variabel (SPLDV). Subjek penelitian ini adalah 15 orang peserta didik kelas VIII MTs Atsauri Foundation Kecamatan Sindangkerta Kabupaten Bandung Barat. Jenis penelitian ini adalah deskriptif kualitatif dengan desain studi kasus. Pengambilan data diperoleh dengan memberikan tes berbentuk uraian tentang materi SPLDV sebanyak tiga soal yang kemudian dianalisis kesulitan yang dihadapi oleh peserta didik. Berdasarkan hasil penelitian disimpulkan bahwa peserta didik masih mengalami kesulitan menyelesaikan soal SPLDV, terlihat dari hasil tes yang didapatkan masih kurang maksimal. Hal itu disebabkan karena peserta didik masih mengalami kesulitan memahami konsep SPLDV, mengubah soal cerita kedalam bentuk matematika, menggunakan metode-metode dalam menentukan himpunan penyelesaian SPLDV dan kesulitan dalam memahami materi pendukung.
PENGARUH HARGA, TESTIMONIAL DAN WORD OF MOUTH (WOM) TERHADAP KETERTARIKAN KONSUMEN PADA PRODUK MS GLOW DI KABUPATEN LUMAJANG
Authors: JurnalBukitPengharapan
Published: August 2021

The purpose of this study was to determine and analyze the effect of the role of price, testimonials and word of mouth (WOM) on consumer interest in MS GLOW products. This type of research uses descriptive quantitative. The data used are primary data using a questionnaire. The research sample was respondents, amounting to 152 people. The dependent variable is consumer interest with 5 indicators. And the independent variables in this study are price, testimonials, and word of mouth (WOM). The data analysis used was multiple linear regression analysis. The results showed that the variable price and word of mouth (WOM) had a significant effect on consumer interest, while testimonials had no effect on consumer interest in MS GLOW products.
PENERAPAN PERHITUNGAN PENYUSUTAN AKTIVA TETAP PADA UD. DND MENGGUNKAN METODE GARIS LURUS
Authors: JurnalBukitPengharapan
Published: August 2021

Tujuan Penelitian Adalah Untuk Melihat Apakah Penerapan Perhitungan Penyusutan Aktiva Tetap Pada Ud.Dnd Menggunkan Metode Garis Lurus Sudah Tepat. Jenis penelitian yang digunakan ialah penelitian deskriptifdengan menggunakan pendekatan kuantitatif. Hasil penelitian adalah Menggunakn metode garis lurus lebihmudah di gunakan dan di pahami dari segi perhitungannya dengan menggunakan rumus di atas. Dan pencatatanaktiva tetap bisa di lakukan dengan benar karena sudah menghitung penyusutan pertahunnya tetap sama
Face Stereotypes from Insufficient Statistical Learning
Authors: Bai Xuechunzi , Uddenberg Stefan , Labbree Brandon P. , Todorov Alexander
Published: August 2021

Social stereotypes are prevalent and consequential, yet sometimes inaccurate. How do people learn these inaccurate beliefs in the first place and why do these beliefs persist in the face of counter evidence? Building on past research on cognitive limitations and environmental sample biases, we propose an integrative perspective: Insufficient statistical learning (Insta-learn). Instalearn posits that humans are active learners of the environment. Starting from a small sample, people are able to extract statistical patterns within the sample accurately and quickly. However, people do not continue sampling sufficiently. If they decide not to collect more samples once they are (prematurely) satisfied, inaccurate stereotypes can emerge even when more data would show otherwise. We investigated this hypothesis across six online experiments (N = 1565), using novel pairs of computer-generated faces and social behaviors. Fixing the population level statistics of face-behavior associations to zero and varying the initial sample statistics, we found that participants quickly learned the initial sample statistics (from as few as three examples) and persisted in using such spurious associations in their final decisions. Granting the sampling power to participants — samples were endogenously generated by participants and not defined by the experimenters — we found insufficient sampling caused spurious associations to persist. Insta-learn provides a domain-general framework for a mechanistic explanation of the emergence and persistence of social stereotypes.
Upaya Meningkatkan Minat Untuk Menabung Pada PT. BPR Samudera Painan
Authors: Utama Nuri , Marlius Doni
Published: August 2021

The purpose of this study was to determine the efforts made at PT. BPR Samudera Painan in increasing custumer interest in saving. This research method is carried out in a qualitative way, namely explaning descriptively. Where the efforts made by PT. BPR Samudera Painan is conducting promotions by means of education, going to school, to majelis taklim, distributing, calendars, distributing brochures, placing advertisements through Painan radio with the aim of making prospective debtors aware of existing products and services and then relying on marketing patterns, namely savins services by picking up savings to a place customer businesses that received a positive response from custumers as seen by an increase in customer savings.
Railway suicides are less likely to occur on rainy days: Evidence from Japan
Authors: Sueki Hajime
Published: August 2021

Background: Patrols at stations and along railway lines can reduce the number of railway suicides; however, it is not sufficiently clear when railway suicides are most likely to occur. Aim: We examined the relationship between daily rainfall and the occurrence of railway suicides. Methods: We received the locations and daily data on the occurrence of railway suicides from a major railroad company in Japan. We also collected rainfall data from the Japan Meteorological Agency database for a roughly central locations of the railroad company. The study covered a period of five years, from April 2016 to March 2021. Results: Suicides occurred on 23 rainy days (3.9%) and 92 non-rainy days (7.4%). The incidence of suicides on rainy days was significantly lower than that on non-rainy days. Limitations: We were not able to obtain daily data on the number of rail passengers; therefore, could not rule out the possibility that the suicide incidence rate is lower on rainy days because the number of railroad users is lower on such days. Conclusion: Information about the weather could be used to improve the efficiency of patrols to prevent railway suicides.
Sociodemographic differences in youth alcohol sipping’s nomological network
Authors: Watts Ashley L. , Megahan JaiAnna F. , Conlin William , Doss Mark I. , Sher Kenneth J.
Published: August 2021

Background: Previous research has established that certain features of personality and psychopathology (e.g., impulsivity, mood disorder, thought disorder) are associated with an increased likelihood of having sipped alcohol in youth, and substance involvement and problems into adolescence and adulthood. What is less clear from the existing literature is whether well-established risk factors of substance use are consistent across varied sociodemographic factors (i.e., gender, race/ethnicity, religious affiliation, income, parental education). Methods: We used a large, community sample of 9- and 10-year-olds (N = 11,872; 53% female) and examined whether various sociodemographic characteristics moderate the associations between sipping behavior and its various well-established correlates (e.g., impulsivity, behavioral inhibition and activation, psychopathology, parenting, and family conflict). Results: There were small mean level differences in sipping across sociodemographic characteristics. Across sociodemographic characteristics, however, sipping was fairly uniformly associated with youth-reported impulsivity, behavioral activation, prodromal psychosis symptoms, mood and externalizing disorder diagnoses, and parenting indices. Effects were sometimes slightly more pronounced among groups for which alcohol consumption is relatively nonnormative: Sipping among female youth was slightly more associated with thought disorder psychopathology than with male youth (D = .07), and was slightly more associated with some aspects of psychopathology and impulsivity for Black youth compared with White and Hispanic youth (Ds were .07 and .09). Conclusions: In broad brush, our findings suggest that the psychosocial correlates of precocious alcohol use are relatively consistent across sociodemographic factors.
Rules of thumb and cultural evolution: How simple heuristics have guided human adaptation and the emergence of cultural complexity
Authors: Kaaronen Roope Oskari , Manninen Mikael A. , Eronen Jussi T.
Published: August 2021

This article combines insights from ecological rationality and cultural evolution to illustrate how simple heuristics – colloquially, “rules of thumb” – have guided human behaviour and the evolution of complex cultures. Through a variety of examples and case studies, we discuss how human cultures have used rules of thumb in domains as diverse as foraging, resource management, social learning, moral judgment, and cultural niche construction. We propose four main arguments. Firstly, we argue that human societies have a rich cultural history in applying rules of thumb to guide daily activities and social organization. Second, we emphasise how rules of thumb may be convenient units of cultural transmission and high-fidelity social learning – the backbones of cumulative cultural evolution. Third, we highlight how rules of thumb can facilitate efficient decision making by making use of environmental and bodily features. Fourth, we discuss how simple rules of thumb may serve as building blocks for the emergence of more complex cultural patterns. This paper sets a research agenda for studying how simple rules contribute to cultural evolution in the past, the present, and the Anthropocene future.
Use of the Oxford Face Matching Test Reveals an Effect of Ageing on Face Perception but Not Face Memory.
Authors: Stantic Mirta , Bird Geoffrey , Catmur Caroline , Hearne Bethan
Published: August 2021

Effects of ageing on both face perception and face memory have previously been reported. Previous studies, however, have not controlled for the effects of face perception when assessing face memory, meaning that apparent effects of ageing on face memory may actually be due to effects of ageing on face perception. Here, both face perception and face memory were assessed in a sample of adults ranging in age from 18 to 93, and the effect of age on face memory was assessed after controlling for face perception. Face perception was assessed using both a standard test and the Oxford Face Matching Test (OFMT), deliberately designed to avoid the bias towards younger, neurotypical samples that may be present in other tests. An effect of ageing on face perception was found using both tests, with the unbiased OFMT being more sensitive to the effect of age. Importantly, when controlling for face perception using the OFMT, no effect of age on face memory was found. Indicative scores on the OFMT from a sample of 989 participants are provided, broken down by age and gender.
Understanding experiences of changing socioeconomic and psychosocial adversities during COVID-19 for freelancers working in the UK cultural sector: A rapid approach
Authors: Warran Katey , May Tom , Fancourt Daisy , Burton Alexandra
Published: August 2021

There is a dearth of qualitative research exploring how freelancers working in the cultural industries have been affected during COVID-19. In particular, there is a lack of research exploring how socioeconomic and psychosocial adversities may have changed or evolved, and how these changes have been experienced. This study builds on qualitative interviews carried out in July-November 2020 (n=20) by exploring findings from follow-up interviews conducted in May-July 2021 (n=16). It presents a diversity of experiences, showing how some freelancers experienced small changes (e.g., to the kind of work carried out), with others experiencing major changes (e.g., leaving the sector completely). The study also explores experiences of ongoing or increased mental health impact, as well as changing attitudes to cultural work. It concludes with a call for highly bespoke support in the future that can address the huge disparity of experiences during this time.
Anatomical characteristics correlated to peg strength in Arachis
Authors: Levinson C.M. , Chu Y. , Levinson M. , Marasigan K. , Stalker H.T. , Holbrook C.C. , Ozias-Akins P.
Published: August 2021

Wild, diploid Arachis species are a great source of biotic and abiotic stress resistances and tolerances for peanut breeding programs; however, these species also have undesirable characteristics such as small seed size, low yield, and weak peg strength. Peg strength has been shown to have a positive, linear relationship with yield in cultivated peanut. Therefore, the weak peg strength of wild Arachis species could be detrimental to yield and needs to be selected against when introgressing useful alleles from wild species into elite germplasm. To enable breeders to effectively utilize these wild species, we sought to characterize peg strength and anatomical characteristics correlated with peg strength in seven diploid Arachis species, as well as four allotetraploids, six (cultivated peanut lines x allotetraploid) F1 hybrids, and two cultivated peanut breeding lines. For each genotype, five mature pegs were tested for peg strength and cross-sections for three of the five pegs were subsequently taken and analyzed for peg anatomical characteristics including total peg cross-section area, mean bundle cap area, total bundle cap area, bundle cap as a percentage of peg area, bundle cap number, mean distance between bundle caps, total distance between bundle caps, and tannin cell count. Genotype was a significant indicator for peg strength and all the anatomical characterization parameters (P < 0.05). Peg strength was positively and highly correlated with peg area, mean bundle cap area, total bundle cap area, and bundle cap number. Peg strength comparable to that of peanut breeding lines was recovered in the F1 hybrids. Because weak peg strength in the wild species appears to be recessive, strong pegs can likely be easily selected during the process of introgression.
On-Farm Evaluation of Nozzle Types for Peanut Pest Management Using Commercial Sprayers
Authors: Virk S.S. , Prostko E.P. , Kemerait R.C. , Abney M.R. , Rains G.C. , Powell C.T. , Carlson D.S. , Jacobs J.L. , Tyson W.G.
Published: August 2021

Growers have rapidly adopted auxin-resistant cotton and soybean technologies. In Georgia, growers who plant auxin-resistant cotton/soybean are required to utilize nozzles that produce larger (coarser) droplets when spraying auxin herbicides to minimize potential off-target movement of pesticides. Consequently, these nozzles are also used in peanut (an important rotational crop with cotton) since changing nozzles between crops is uncommon for growers. However, larger droplets can result in reduced spray coverage which may lead to less effective pest control. Therefore, seven on-farm trials were conducted in commercial peanut fields using commercial sprayers from 2018 to 2020 across four different locations in Georgia to compare the spray performance of air-induction (AI) nozzles that produce very coarse to ultra coarse droplets (VMD50 ≥ 404 microns) with non-AI (conventional flat fan) nozzles that produce medium to coarse droplets (403≥VMD50≥236 microns) for pest management in peanuts. For each trial, test treatments were implemented in large replicated strips where each strip represented a nozzle type. For nozzle comparison, XR and XRC represented non-AI nozzles while TADF, TDXL, TTI, and TTI60 represented the commonly used AI nozzles in these trials. Spray deposition data for each nozzle along with disease ratings, weed and insect control ratings were collected in all on-farm trials. Peanut yield was collected at harvest. Results indicated that the AI nozzles produced larger droplets than the non-AI nozzles in all nozzle tests; however, the spray coverage varied among the nozzle types. Nozzle type did not influence pest (weed, disease and insect) control, or peanut yield (p>0.10) in any of the on-farm trials. These results suggested that peanut growers can utilize these coarser droplet nozzles for pest management in fields with low to average pest pressure during the season. Future research on nozzle evaluation needs to investigate the influence of droplet size, carrier volume, and pressure on coverage and canopy penetration.