bluuebunny/crossref_metadata_2025 huggingface dataset:
DESKRIPSI PEDAGOGIC CONTENT KNOWLEDGE (PCK) MAHASISWA CALON GURU MATEMATIKA MELALUI MICROTEACHING
Authors: Abi Alfonsa Maria
Published: February 2021

Pedagogical content knowledge (PCK) is one of the important elements in improving students' understanding because teachers are required to master teaching materials or subject matter (content) and master teaching knowledge (pedagogic). As a prospective mathematics teacher, students are also required to have PCK skills. This research is a qualitative descriptive type that aims to analyze the ability of PCK prospective mathematics teacher students who take microteaching courses as a prerequisite for conducting PPL activities in schools. The subjects of this study were 34 mathematics education students taking microteaching subjects in the 2015/2016 school year. The results showed that prospective mathematics teacher students have been able to coordinate and arrange all parts of the lesson plan properly, especially in terms of systematics. This means that they have good knowledge about the curriculum, understand students according to their level of knowledge in secondary schools and know how to evaluate. The results of the description of the implementation of the learning process, found that students are still lacking in teaching knowledge and about content, have not been able to do learning in accordance with what has been designed and are not able to understand well how to present the material according to learning strategies in the lesson plan. PCK students in the learning process still has many shortcomings, especially in the content, teaching and students. Students understand the concepts or teaching material but are less able to explain. Plans and implementation must be in harmony so that PCK's capabilities are more leverage.Kata Kunci: Mathematics, Microteaching, PCK
PENGARUH PENDEKATAN REALISTIC MATHEMATICS EDUCATION (RME) TERHADAP PRESTASI BELAJAR MATEMATIKA SISWA SMP
Authors: Yulianti Sri , Yulianti Sri
Published: February 2021

AbstrakPenelitian  ini bertujuan untuk mengetahui pengaruh pembelajaran model Realistic Mathematics Education (RME) terhadap hasil belajar matematika siswa kelas VII di SMP Ba’it Al-Quran Kayuagung tahun ajaran 2019/2020. Penelitian ini dilakukan di SMP Ba’it Al-Quran  tahun  ajaran 2019/2020. Jenis penelitian ini adalah penelitian eksperimen semu (quasi experiment). Teknik pengambilan sampel dalam penelitian ini menggunakan teknik simple random sampling, Sampel penelitian ini adalah kelas VII Cairo sebagai kelas eksperimen dan kelas VII mekah sebagai kelas kontrol. Instrumen tes menggunakan jenis tes essay.  Teknik analisis data dengan cara uji prasyarat dan uji hipotesis. Uji prasyarat berupa uji normalitas dan homogenitas sedangkan uji hipotesis menggunakan analisis statistika  parametrik yaitu  Independent Sample T Test pada taraf signifikansi α = 0,05. Hasil penelitian menunjukkan bahwa terdapat perbedaan hasil belajar anatara siswa yang menggunakan pendekatan Realistic Mathematics Education dengan siswa yang menggunakan pendekatan Teacher Centered .Hal ini di buktikan dari analisis uji  Independent Samples T Test nilai post test diperoleh signifikansi 0,000 <  0,05, maka H0 ditolak. yang artinya pendekatan Realistic Mathematics Education (RME) berpengaruh terhadap hasil belajar matematika siswa  SMP ba’it Al-Quran Kayuagung.Keyword : Pendekatan pembelajaran, RME, prestasi belajar
PENGARUH MEDIA PEMBELAJARAN POWERPOINT MELALUI METODE DISCOVERY TERHADAP KEMAMPUAN PEMECAHKAN MASALAH MAHASISWA
Authors: Darwis Rahma Hidayati
Published: February 2021

Penelitian ini menggunakan metode penelitian kuantitatif jenis eksperimen untuk mencari perbedaan pengaruh penerapan media pembelajaran powerpoint melalui metode penemuan terbimbing terhadap kemampuan pemecahan masalah mahasiswa. Penelitian ini termasuk penelitian eksperimen semu karena tidak semua variabel dapat dikontrol. Variabel yang dimanipulasi hanya variabel bebas yakni pembelajaran dengan menggunakan media pembelajaran powerpoint melalui metode penemuan terbimbing (discovery) dan variabel terikatnya adalah kemampuan pemecahan masalah mahasiswa Matakuliah Statistika Inferensial. Berdasarkan hasil analisis maka dapat disimpulkan bahwa penggunaan media powerpoint melalui pendekatan pembelajaran discovery membuat peserta didik lebih aktif dalam proses pembelajaran sehingga memberikan stimulasi terhadap kemampuan berpikir mahasiswa. Selain itu melalui aktivitas-aktivitas yang dilakukan seperti melakukan pengamatan dan perbandingan dengan beberapa masalah yang relevan dengan materi, meperoleh bimbingan dalam membuat pola-pola sebagai embrio dari pemaknaan konsep, terlibat aktif diskusi maka diperoleh ada perubahan positif yang cukup signifikan terhadap kemampuan pemecahan masalah peserta didik
KEMAMPUAN PEMECAHAN MASALAH MATEMATIS SISWA DALAM MENYELESAIKAN SOAL HOTS DI SMK NASIONAL MAKASSAR
Authors: Taufik Akbar , Arsid Irfan
Published: February 2021

Soal HOTS adalah salah satu yang dapat digunakan untuk mengukur kemampuan siswa dalam penyelesaian masalah, oleh karena itu secara terperinci tujuan dari penelitian ini adalah untuk mengetahui bagaimana kemampuan menyelesaikan  masalah matematis siswa dalam menyelesaikan soal HOTS di SMK Nasional Makassar. Metode yang digunakan dalam penelitian ini adalah penelitian deskriptif. Dalam penelitian ini akan disajikan data dari hasil penelitian sebagaimana adanya, tidak menarik kesimpulan yang lebih jauh apalagi meramalkan apa yang akan terjadi kedepan setelah penelitian. Dalam pengumpulan data digunakan dua metode, yaitu metode dokumentasi, dimana dalam metode ini akan menghasilkan data berupa hasil kerja siswa, dan yang kedua adalah dengan metode wawancara, dalam wawancara ini, peneliti akan menggali bagaimana tanggapan dan kemampuan memecahkan masalah dari siswa tersebut. Adapun tahapan yang akan dilakukan dalam penelitian ini mencakup tiga langkah 1) tahapan Persiapan, 2) tahapan pelaksanaan penelitian, dan 3) penyusunan laporan. Hasil dalam penelitian ini adalah siswa SMK nasional masih kurang dalam mengerjakan soal HOTS, ini terlihat  kurang dari 50% siswa yang mampu menjawab sampai dengan 5 pertanyaan yang merupakan soal berkategori HOTS. Dimana hanya ada 18 orang siswa yang mampu menjawab 2 nomor soal dengan kategori menganalisis dan hanya 5 orang yang mampu menjawab pada kategori mengevaluasi. Sedangkan pada tingkatan mencipta tak seorang pun siswa mampu menjawab dengan tepat. Ini disebabkan karena kemampuan dan ketelitian siswa dalam menganalisis dan memvisualisasikan soal dalam bentuk gambar masih sangat kurang.
PENGGUNAAN SOFTWARE GEOGEBRA PADA MATAKULIAH MATEMATIKA I MATERI INTEGRAL
Authors: Amiruddin Amiruddin
Published: February 2021

Penelitian ini bertujuan untuk mengetahui peningkatan pemahaman matematis mahasiswa STT Migas Balikpapan pada matakuliah matematika I materi integral. Jenis penelitian ini adalah penelitian eksperimen, dengan populasi mahasiswa STT Migas Balikpapan yang mengambil matakuliah matematika I pada semester I, dan sampel dalam penelitian ini diperoleh satu kelas dengan menggunakan teknik purposive sampling. Instrumen penelitian ini berupa tes uraian untuk mengukur tingkat pemahaman matematis materi integral. Desain dalam penelitian ini adalah quasi eksperimen dengan desain one group pretest-posttest data yang diperoleh dianalisis dengan menggunakan N-Gain Score. Berdasarkan hasil penelitian  nilai rata-rata pretest 38,33 setelah dilakukan pengunaan geogebra diperoleh nilai rata-rata postest 74,17, dengan nilai N-Gain 0,62 dengan kategori sedang dan untuk tafsiran keefektifan N-Gain sebesar 62% dengan kata lain penggunan geogebra dikategorikan cukup efektif, sehingga penelitian ini dapat disimpulkan bahwa penggunaan geogebra dapat meningkatkan kemampuan pemahaman matematis mahasiswa materi integral.
PENERAPAN MODEL CPS BERBASIS LKS SOAL TIMSS UNTUK MENGUKUR KEMAMPUAN PEMECAHAN MASALAH
Authors: Kamaruddin Rahmat , Razak Firdha , Sutrisno Ahmad Budi
Published: February 2021

Trend in International Mathematics and Science Study (TIMSS) menempatkan Indonesia pada posisi yang belum menggembirakan. Indonesia masih mengalami kesulitan dalam menghadapi soal matematika terutama soal-soal matematika model TIMSS. Penelitian ini bertujuan untuk menerapkan model pembelajaran creative problem solving dengan menggunakan LKS soal TIMSS pada konten aljabar untuk mengukur kemampuan pemecahan. Penelitian ini menggunakan jenis penelitian deskriptif kuantitatif dengan populasi seluruh siswa VII SMP Negeri 1 Pangkajene berjumlah 180 siswa. Pengambilan sampel menggunakan teknik simple random sebanyak 32 siswa. Teknik pengumpulan data yang digunakan adalah tes dan wawancara. Instrumen dalam penelitian ini adalah 1) LKS soal TIMSS; 2) Tes kemampuan pemecahan masalah; 3) Pedoman wawancara. Data akan dianalisis deskriptif kuantitatif serta analisis inferensial. Hasil penelitian diperoleh: 1) kemampuan pemecahan masalah siswa(pretest) sesuai aspek yang dinilai dalam TIMSS yang dianalisis secara deskriptif berada pada interpretasi sedang yakni sebesar 10 siswa atau 33% dari 32 siswa sedangkan kemampuan pemecahan masalah siswa(posttest) berada pada interpretasi tinggi yakni sebesar 17 siswa atau 54% dari 32 siswa. Hasil uji gain ternormalisasi yaitu 0,52 yang berarti peningkatan hasil belajar siswa yang diajar dengan penerapan model pembelajaran Creative problem solving (CPS) berada pada kategori sedang. 2) Presentase rata-rata siswa yang memberi respon positif terhadap penerapan model Creative problem solving (CPS) sebesar 81%. Hal ini menunjukkan bahwa kriteria keefektifan penerapan model pembelajaran Creative problem solving (CPS) untuk respon siswa telah terpenuhi. 3) Secara inferensial, dapat dinyatakan bahwa penerapan model pembelajaran Creative problem solving (CPS) Tuntas secara klasikal serta memiliki daya dongkrak peningkatan gain 0,3 atau terdapat peningkatan rata-rata nilai gain ternormalisasi secara signifikan sehingga model ini baik digunakan dalam pembelajaran matematika di SMP Negeri 1 Pangkajene.
Multivariable generalized predictive control of reactive distillation column process for biodiesel production
Authors: ÇAĞATAY Mehmet , KARACAN Suleyman
Published: February 2021

Most industrial control systems consist of a significant number of control loops. Generally, large processes are divided into many interconnected subsystems affecting each other, thus creating multivariable systems known as multiple–input multiple–output (MIMO) process. Generalized Predictive Control (GPC) based control algorithm is most suitable for MIMO systems. In this study, multivariate nonlinear (NL) GPC and discrete–time PID control of calcium oxide catalyst–packed reactive distillation (RD) column used for biodiesel production from waste cooking oil were investigated. Temperatures of reaction and reboiler sections were controlled by using non–decoupled and decoupled MIMO NLGPC and discrete–time MIMO PID algorithms. Feed flow rate with constant molar ratio and reboiler heat duty parameters were selected as manipulating variables. All recommended control methods, except for non-decoupled MIMO NLGPC, have been found to perform satisfactorily reference tracking and disturbance rejection in RD column. Consequently, the best control results were obtained in the decoupled MIMO NLGPC.
Freeze-thaw resistance of blast furnace slag alkali activated mortars
Authors: BİNGÖL Şinasi , BİLİM Cahit , ATİŞ Cengiz , DURAK Uğur
Published: February 2021

In this study, blast furnace slag geopolymer mortars were prepared in prism molds with the size of 4 x 4 x 16 cm by alkali activating powdered sodium meta silicate (Na2SiO3). The mortar mixtures prepared to contain sodium in different proportions were cured with 3 different curing methods, and 300 cycles of freeze-thaw were applied, and strength and weight losses were examined. Control samples prepared with PC were also exposed to freeze-thaw cycles and the results were compared with each other. It was observed that 8% sodium added geopolymer mortars significantly preserved their compressive strength and weight. Especially, the compressive strength of the samples produced with 8% sodium and exposed to freeze-thaw cycle after 28 days of air curing increased by around 32%.
Filming Change: Civil Rights through the Lens of Guess Who’s Coming to Dinner? and To Kill a Mockingbird
Authors: K. Ryan Mary
Published: February 2021

The 1960s were a turbulent decade in the United States. Significant social changes, especially in the realm of antiracism and antisexism, were afoot. Concurrently, in an echo to such dramatic social change, popular culture was also evolving. This article examines two relevant films to evaluate their ability to perform a moral critique of gender and racial politics in the 1960s. Alongside an analysis of social and political trends and Supreme Court cases, I compare two critically acclaimed industry films, To Kill a Mockingbird (1962) and Guess Who’s Coming to Dinner (1967), to better understand cultural and political reforms in the 20th century.
On Peterson's open problem and representations of the general linear groups
Authors: Võ Phúc Đặng
Published: February 2021

Fix $\mathbb Z/2$ is the prime field of two elements and write $\mathcal A_2$ for the mod $2$ Steenrod algebra. Denote by $GL_d:= GL(d, \mathbb Z/2)$ the general linear group of rank $d$ over $\mathbb Z/2$ and by $\mathscr P_d$ the polynomial algebra $\mathbb Z/2[x_1, x_2, \ldots, x_d]$ as a connected unstable left $\mathcal A_2$-module on $d$ generators of degree one. We study the Peterson "hit problem" of finding the minimal set of $\mathcal A_2$-generators for $\mathscr P_d.$ Equivalently, we need to determine a basis for the $\mathbb Z/2$-vector space $$Q\mathscr P_d := \mathbb Z/2\otimes_{\mathcal A_2} \mathscr P_d \cong \mathscr P_d/\mathcal A_2^+\mathscr P_d$$ in each degree $n\geq 1.$ Note that this space is a representation of $GL_d$ over $\mathbb Z/2.$ The problem for $d= 5$ is not yet completely solved, and unknow in general.In this work, we give an explicit solution to the hit problem of five variables in the generic degree $n = r(2^t -1) + 2^ts$ with $r = d = 5,\ s =8$ and $t$ an arbitrary non-negative integer. An application of this study to the cases $t = 0$ and $t = 1$ shows that the Singer algebraic transfer of rank $5$ is an isomorphism in the bidegrees $(5, 5+(13.2^{0}-5))$ and $(5, 5+(13.2^{1}-5)).$ Moreover, the result when $t\geq 2$ was also discussed. Here, the Singer transfer of rank $d$ is a $\mathbb Z/2$-algebra homomorphism from $GL_d$-coinvariants of certain subspaces of $Q\mathscr P_d$ to the cohomology groups of the Steenrod algebra, ${\rm Ext}_{\mathcal A_2}^{d, d+*}(\mathbb Z/2, \mathbb Z/2).$ It is one of the useful tools for studying these mysterious Ext groups.
Ijtihad
Authors: Suheli Ahmad
Published: February 2021

Ijtihad adalah pengarahan segenap daya upaya untuk menemukan hukum sesuatu secara rinci. Hal ini diupayakan oleh ulama untuk menjawab segala persoalan yang muncul ketika dalam sumber utama agama islam tidak ditemukan dalil dan ketentuan hukum yang jelas. Para ulama telah menentukan syarat-syarat bagi mereka yang ingin berijtihad. Selain itu, para ulama telah mensistematisasikan pola-pola ijtihad dalam penerapannya. Pola-pola tersebut setidaknya biasa dibagi tiga, yaitu: pola bayani, ta`lilim dan intishali.
pengendalian dan pencegahan penyakit menular di masyarakat
Authors: s Winda dwi
Published: February 2021

Setiap manusia pasti pernah mengalami sakit. Penyakit yang diderita oleh setiap orang pasti berbeda satu dengan yang lain. Sakit merupakan suatu keadaan dimana tubuh tidak berada pada kondisi normal yang disebabkan oleh beberapa faktor dari dalam maupun dari luar tubuh. Berdasarkan karakteristiknya penyakit dapat digolongkan menjadi dua, yaitu penyakit menular dan penyakit tidak menular. Penyakit menular mendapatkan perhatian yang lebih dari pemerintah dibanding dengan penyakit tidak menular. Penyakit menular adalah penyakit yang disebabkan oleh bakteri, virus, atau parasit yang dapat ditularkan melalui media tertentu. Penyakit menular sering disebut juga penyakit infeksi, karena penyakit ini diderita melalui infeksi virus, bakteri, atau parasit yang ditularkan melalui berbagai macam media, seperti udara, jarum suntik, tranfusi darah, tempat makan atau minum, dan lain sebagainya. Penyakit menular erat kaitan dengan epidemiologi. Epidemiologi berasal dari bahasa Yunani, yaitu Epi yang berarti “pada”, Demos yang berarti “penduduk”, dan Logos yang berarti “penduduk”. Jadi epidemiologi adalah ilmu yang mempelajari hal-hal yang berkaitan dengan masyarakat. Pada era dewasa ini telah terjadi pergeseran pengertian epidemiologi, yang dulunya lebih menekan ke arah penyakit menular ke arah-arah masalah kesehatan dengan ruang lingkup yang sangat luas. Keadaan ini terjadi karena transisi pola penyakit yang terjadi pada masyarakat, pergeseran pola hidup, peningkatan sosial, ekonomi masyarakat, dan semakin luasnya jangkauan masyarakat. Mula- mula epidemiologi mempelajari penyakit yang dapat menimbulkan wabah melalui temuan-temuan tentang penyakit wabah, cara penularan dan penyebab serta bagaimana penanggulangan penyakit wabah tersebut. Kemudian tahap berikutnya, berkembang lagi menyangkut penyakit yang infeksi non wabah. Lalu setelah itu, dengan mempelajari penyakit penyakit non infeksi seperti jantung, karsinoma, hipertensi, dan lain.Pergeseran ini pula yang menyebabkan pergeseran definisi dalam epidemiologi, yang tadinya hanya menekan pada penyakit-penyakit menular, yang meliputi pencegahan, pemberantasan penyakit menular ke arah mempelajari masalah-masalah kesehatan yang terjadi pada masyarakat atau sekelompok manusia yang menyangkut frekuensi, distribusi masalah kesehatan dan faktor-faktor yang mempengaruhinya. Sekarang banyak penyakit-penyakit menular yang sedang mewabah di tengah-tengah masyarakat, baik penyakit yang sudah ditemukan cara pengobatannya maupun yang belum ditemukan cara pengobatanya.
Argumen tentang tantangan terhadap pancasila sebagai ideologi negara
Authors: Vionita Rina
Published: February 2021

Lahirnyaketentuandalam Pasal35ayat(5)Undang-UndangNomor12 Tahun2012menyatakan bahwa kurikulum pendidikan tinggi wajib memuat mata kuliah pendidikanagama,pendidikanPancasila,pendidikankewarganegaraan,danbahasa Indonesia,menunjukkan bahwa Negara berkehendak agarpendidikan Pancasila dilaksanakandanwajibdimuatdalam kurikulum peguruantinggisebagaimata kuliahyangberdirisendiri.Dengandemikian,matakuliahpendidikanPancasilaini dapatlebihfokusdalam membinapemahamandanpenghayatanmahasiswa mengenaiideologibangsa Indonesia.Artinya,pendidikan Pancasila diharapkan menjadiruhdalam membentukjatidirimahasiswadalam mengembangkanjiwa profesionalitas mereka sesuaidengan bidang studimasing-masing.Selain itu, denganmengacukepadaketentuanpasal2Undang-UndangNomor12Tahun2012, sistem pendidikantinggidiIndonesiaharusberdasarkanPancasila.Implikasinya, sistem pendidikantinggidiIndonesiaharusterusmengembangkannilai-nilai Pancasiladalam berbagaisegikebijakannyadanmenyelenggarakanmatakuliah pendidikanPancasilasecarasungguh-sungguhdanbertanggungjawab.
Esensi pancasila dalam kajian sejarah bangsa indoensia
Authors: SHAKTI AFAN ANANTA
Published: February 2021

Pancasila adalah lima nilai dasar luhur yang ada dan berkembang bersama dengan bangsa Indonesia sejak dahulu.Sejarah merupakan deretan peristiwa yang saling berhubungan. Peristiwa-peristiwa masa lampau yang berhubungan dengan kejadian masa sekarang dan semuanya bermuara pada masa yang akan datang. Hal ini berarti bahwa semua aktivitas manusia pada masa lampau berkaitan dengan kehidupan masa sekarang untuk mewujudkan masa depan yang berbeda dengan masa yang sebelumnya.Dasar Negara merupakan alas atau fundamen yang menjadi pijakan dan mampu memberikan kekuatan kepada berdirinya sebuah Negara. Negara Indonesia dibangun juga berdasarkan pada suatu landasan atau pijakan yaitu pancasila. Pancasila, dalam fungsinya sebagai dasar Negara, merupakan sumber kaidah hukum yang mengatur Negara Republik Indonesia, termasuk di dalamnya seluruh unsur-unsurnya yakni pemerintah, wilayah, dan rakyat. Pancasila dalam kedudukannya merupakan dasar pijakan penyelenggaraan Negara dan seluruh kehidupan Negara Replubik Indonesia.Pancasila sebagai dasar Negara mempunyai arti yaitu mengatur penyelenggaraan pemerintahan. Konsekuensinya adalah Pancasila merupakan sumber dari segala sumber hukum. Hal ini menempatkan pancasila sebagai dasar Negara yang berarti melaksanakan nilai-nilai Pancasila dalam semua peraturan perundang-undangan yang berlaku. Berdasarkan latar belakang masalah di atas maka diangkat dalam bentuk makala yang berjudul “PANCASILA DALAM KAJIAN SEJARAH BANGSA INDONESIA”.
Bahaya Merokok bagi kesehatan
Authors: wahono Qorifatul lailia setio
Published: February 2021

Efek merokok mengakibatkan kecanduan merokok yang terus berkembang di Indonesia, didorong beragam kecenderungan masyarakat, pendapat medis, dan temuan penelitian. Gangguan kecanduan berdasarkan tinjauan literature merokok. Kecandauan tembakau paling bermasalah di seluruh dunia dan merugikan. Efek kesehatan yang meliputi jutaan kematian dini. Melaporkan tingkat tinggi merokok mungkin tidak meningkatkan tingkat paparan toksin secara proporsional. Perokok berat mencerminkan upaya untuk mengekstrak lebih banyak nikotin dari rokok dan meningkatkan paparan toksin. Selain itu, tingkat merokok yang lebih tinggi dapat menyebabkan kerusakan fatal dan peningkatan trigliserida. Dianalisis dengan fotometer pada sampel darah. Terkait dengan akumulasi konsumsi tembakau dan merokok selama bertahun-tahun dengan usia dan jenis kelamin. Dalam penelitian, paparan yang lebih tinggi dikaitkan dengan peningkatan trigliserida. Menunjukkan bahwa akumulasi merokok seumur hidup dapat menyebabkan kerusakan fatal dan peningkatan trigliserida. Konsentrasi trigliserida darah adalah salah satu parameter yang paling sering digunakan dalam praktik klinis.Kata kunci : Kadar Trigliserida, Perokok aktif dan pasif
NatureMath-Can the new Neural Algebra prove Math is a true Nature Science
Authors: Chen Weibin
Published: February 2021

NatureMath-Can the new Neural Algebra prove Math is a true Nature Science？
Mambangun Prestasi Atlet Tenis Lapangan Melalui Pendekatan Psikologis
Authors: Budi Didik Rilastiyo
Published: February 2021

Tenis lapangan merupakan salah satu olahraga yang disebut sebagai “Top of Sport” karena memiliki karakteristik permainan yang cepat, determinasi tinggi dan memerlukan pengambilan keputusan yang tepat dalam waktu singkat. Di indonesia, tenis lapangan pada perkembangannya telah memiliki banyak atlet dari berbagai daerah yang potensial dan dapat bersaing di tingkat nasional maupun internasional. Program latihan telah dijalankan oleh pelatih dan berbagai klub atau sekolah tenis untuk meningkatkan keterampilan dan prestasi atlet. Pada masa pandemi Covid 19, program latihan yang dijalankan harus mengalami perubahan dan inovasi, sehingga atlet-atlet tenis di daerah dapat tetap berlatih. Salah satu program yang perlu dijalankan dan dikembangkan dalam proses latihan pada masa pandemi Covid 19 yaitu program latihan mental atau psikologi. Dengan pendekatan psikologi maka diharapkan para atlet tenis daerah tetap memiliki motivasi yang tinggi dalam berlatih dan berprestasi ditengan pandemi Covid 19 yang belum juga usai.
Urban-Scale Evaluation of Cool Pavement Impacts on the Urban Heat Island Effect and Climate Change
Authors: Azarijafari Hessam , Xu Xin , Gregory Jeremy , Kirchain Randolph
Published: February 2021

We implemented a context-sensitive and prospective framework to assess the global warming potential (GWP) impacts of cool pavement strategies on specific roads for different cities. The approach incorporates several interconnections among different elements of the built environment, such as buildings and urban road segments, as well as the transportation fleet, using specific building and pavement information from an urban area. We show that increasing pavement albedo lowers urban air temperatures but can adversely affect the building energy demand in the areas with high incident radiation exposure. The heating energy savings and the radiative forcing effect improve the GWP savings in a cold and humid climate condition. The total GWP saving intensity is sensitive to the city morphology and road traffic. Our probabilistic results show that cool pavement strategies can offset 1.0-3.0% and 0.7-6.0% of the total GHG emissions of the US cities Boston and Phoenix, respectively, for a 50-year analysis period. The worldwide range of savings can be as large as 5.0 - 44.7 Gt CO2eq. A paradigm shift in pavement strategy selection is required in most of the neighborhoods.
Thermodynamic barrier to nucleation for manganese oxide nanoparticles synthesized by high-temperature gas-to-particle conversion
Authors: Camacho Joaquin , Dasappa Shruthi
Published: February 2021

A complementary experimental and modeling study is reported here for nucleation of manganese oxide nanoparticles in premixed stagnation flames. The current synthesis occurs at relatively high flame temperature and low precursor loading. Thermodynamic analysis based on the postulated nucleation process, Mn(g) + O2(g) MnO(s), is carried out to quantify precursor supersaturation and potential impacts of the Kelvin effect on particle formation. Nucleation and growth are analyzed based on the computed temperature-time-oxygen history in the post-flame region. Agreement between measured and computed flame position for the base flame and precursor doped flames indicates that the manganese methylcyclopentadienyl tricarbonyl precursor does not inhibit flame chemistry for the conditions currently studied. Particle size distributions measured by mobility particle sizing and TEM images show reasonable agreement. Moreover, the measured particle size is predicted much more closely by a nucleation-limited mechanism rather than the size predicted by coagulation-limited growth.
Item-specific overlap between hallucinatory experiences and cognition in the general population: A three-step multivariate analysis of international multi-site data
Authors: Chinchani Abhijit Mahesh , Menon Mahesh , Roes Meighen , Hwang Heungsun , Allen Paul , Bell Vaughan , Bless Josef , Bortolon Catherine , Cella Matteo , Fernyhough Charles , Garrison Jane , Kozáková Eva , Laroi Frank , Moffatt Jamie A. , Say Nicolas , Suzuki Mimi , Toh Wei Lin , Zaytseva Yuliya , Rossell Susan , Moseley Peter , Woodward Todd
Published: February 2021

Cognitive mechanisms hypothesized to underlie hallucinatory experiences (HEs) include dysfunctional source monitoring, heightened signal detection, or impaired attentional processes. HEs can be very pronounced in psychosis, but similar experiences also occur in nonclinical populations. Using data from an international multisite study on nonclinical subjects (N = 419), we described the overlap between two sets of variables - one measuring cognition and the other HEs - at the level of individual items, allowing extraction of item-specific signal which might considered off-limits when summary scores are analyzed. This involved using a statistical hypothesis test at the multivariate level, and variance constraints, dimension reduction, and split-half reliability checks at the level of individual items. The results showed that (1) modality-general HEs involving sensory distortions (hearing voices/sounds, troubled by voices, everyday things look abnormal, sensations of presence/movement) were associated with more liberal auditory signal detection, and (2) HEs involving experiences of sensory overload and vivid images/imagery (viz., HEs for faces and intense daydreams) were associated with other-ear distraction and reduced laterality in dichotic listening. Based on these results, it is concluded that the overlap between HEs and cognition variables can be conceptualized as modality-general and bi-dimensional: one involving distortions, and the other involving overload or intensity.
Mutual relationships between the levels and changes in interest, self-efficacy, and perceived difficulty during a task
Authors: Nuutila Katariina , Tapola Anna , Tuominen Heta , Molnár Gyöngyvér , Niemivirta Markku
Published: February 2021

This study examined how students’ interest, self-efficacy, and perceived difficulty change during a task, how those changes relate to each other, and how they predict performance. Sixth-graders (N = 1024) rated their interest, self-efficacy, and perceived difficulty repeatedly during a dynamic problem-solving task. Results from the estimated non-linear and piecewise latent growth curve models showed interest and self-efficacy to decrease, and perceived difficulty first to increase, and then to decrease, over time. The levels of and changes in interest and self-efficacy correlated positively with each other, but negatively with perceived difficulty. Task performance was positively predicted by initial interest and less negative change in self-efficacy, and negatively by initial perceived difficulty and steeper increase in it. The results suggest perceived difficulty to have a distinctive role in the dynamics of task-specific motivation, and on-task changes to be relatively independent of more general motivation and competence.
Direct versus image-based digit ratio (2D:4D) measurement compared: Performance indicators and associations with candidate traits
Authors: Voracek Martin , Kreutzer Carmen , Gabler Daniela , Stieger Stefan
Published: February 2021

Direct vs computer-assisted image-based measurements of the second-to-fourth digit ratio (2D:4D), a widely studied assumed negative correlate of prenatal testosterone, were compared in a sample of 96 men. Both methods yielded comparable associations of 2D:4D with a range of sexually differentiated personality measures, including the Big Five, aggression, hypermasculinity, and self-esteem (partly additionally assessed with implicit tasks and peer-ratings complementing the self-report measures). Directly ascertained 2D:4D was significantly less precisely measurable and significantly higher than 2D:4D ascertained from images by the same observers. In particular, measurement method impacted fingers differentially: directly measured index vs ring fingers were 1% vs 2% shorter, thereby yielding higher 2D:4D than when measured from images. Finger differences in fingertip size have been hypothesized to account for such discrepancies. However, fingertip size is unrelated to 2D:4D. Alternatively, diminished finger extensibility in supinated hand position (when taking direct measurements), as compared with finger extensibility in pronated hand position (when taking palmar-view hand images), might account for these observations. For anatomical reasons, this effect should be stronger for ring fingers than for index fingers and moreover should increase with age. The present data supported this novel hypothesis for explaining measurement-dependent differences in 2D:4D.
[Published] Are You 2 Just Friends? Emotional and Sexual Infidelity Across Sexual Orientations
Authors: Yim Samantha , Tanzer Nicole , Satchwell Margaret , Chen Coty , Wu Juanshu , Javidi Daniel , Hensley Marissa , Phan Catherine , Willis Jarryd
Published: February 2021

Lesbians are unlikely to ask if it is possible for women and women to be friends. Bisexuals have friends of each sex. It seems that it is primarily heterosexuals who have trouble with sex-of-attraction friendships. This study examined how participants perceived the emotional and sexual infidelity of their partner’s relationship with a friend differing across sexuality and biological sex. Our participants consisted of a combined sample across two studies (N = 532), participants completed measures of their perceived emotional and sexual infidelity towards 10 controlled behaviors that their partners committed with the partner’s friends. The data revealed that participants were more concerned with perceived emotional infidelity with sex(es)-of-attraction friends as a function of participants’ sexual orientation, sex, and their lover’s sexual orientation. Our evidence shows that when in relationships, people feel most threatened by the friend of the partner who possesses the same biological machinery as them. Furthermore, results suggest that people are also more likely to be threatened by their partner’s friend, who may have a mutual attraction towards their partner. The effect of the same biological machinery and the mutual attraction on perceived infidelity is additive. The pattern is seen across heterosexual, homosexual, and bisexual relationships.
Learners’ Perceptions of the Influence of Teachers’ Nonverbal Communication on Their Aspirations to Pursue STEM Courses
Authors: Ndeke Grace C. W. , Barmao Anne C.
Published: February 2021

This paper reports the results of a study that investigated secondary school learners’ perceptions of the influence of their science and mathematics teachers’ nonverbal communication on their aspirations to pursue Science, Technology, Engineering and Mathematics (STEM) related courses in institutions of higher learning. The study further investigated if there were gender differences in learners’ perceptions. The nonverbal aspects of communication focused on were teachers’ actions in class and their dressing and grooming. A sample of 465 form three secondary school learners was selected using stratified simple random sampling technique, out of whom 221 were female while 244 were male from Nakuru County, Kenya. Data was collected using a secondary school learner’s questionnaire. The reliability of the questionnaire was estimated using Cronbach alpha and yielded a coefficient of 0.88. The findings show that learners’ perceived their teachers’ nonverbal communication moderately influences their aspirations to pursue STEM. However, the perception on the influence of maintaining eye contact when asking and responding to questions and being always clean and neat were high. Therefore, science and mathematics teacher education programs should enhance pre and in service teacher awareness of the effect of their nonverbal behaviour on their learners. The Teachers Service Commission which is the national teacher regulator and employer in Kenya should ensure that the policy guidelines on teachers’ dressing and grooming are straightforwardly interpreted by all teachers and properly enforced.
The Internal Labor Markets of Business Groups
Authors: Huneeus Cristobal , Huneeus Federico , Larrain Borja , Larrain Mauricio , Prem Mounu
Published: February 2021

This paper provides micro evidence of labor mobility inside business groups. We show that worker flows between firms in the same group are stronger than with unaffiliated firms. Moreover, the reallocation of top workers between group firms is more sensitive to international shocks. Top workers that move within the group in response to shocks reach higher positions and earn higher wages. We find suggestive evidence that productivity increases when firms receive same-group top workers. Our results are consistent with the hypothesis that, in response to changing opportunities, joint ownership eases the redeployment of workers endowed with general management skills.
New Paradigm in Millennial Business: A Case Study of Pilona Coffee, Tangerang City
Authors: Anggreni Tri , Farunik Canggih Gumanky , Hendra Hendra
Published: February 2021

Millennial has its own character of thinking, because when compared to the previous generation who carried out the process of adaptation to the development of information technology, millennial grew and lived with the technology. They thrive with memes, digital markets, electronic money, and social media networks. Virality makes something quickly famous and quickly forgotten, collective memory is limited to how long digital traces can last on the internet. On the basis of that problem, this study was prepared with the question "What is the character of millennial leadership based on the organizational culture of the natural ecosystems they have built?â€ The purpose of this study is to understand the cultural character of millennial organizations based on their natural ecosystem so that they influence the lead character. This study uses a qualitative method with close observation within a certain period of time for several millennial adolescents involved in the organization as the main sample, categorized based on their level of exposure to the internet. The expected outcome of this research is a deep understanding of how millennial organizational culture influences the character of its leadership.
Study of Spinal anesthesia in patients with Scoliosis at a tertiary hospital
Authors: Goel Akshi , Jeelani Tahleel Mohd , Saleem Basharat
Published: February 2021

Background: Scoliosis is a complex deformity of the vertebral spines resulting in lateral curvature, rotation of the vertebrae and deformity of the rib cage. 75 -90% of cases of scoliosis are of the idiopathic type, out of which the adolescent type is most common. Patients with scoliosis present challenges in administration of anesthesia during surgical procedures. The common problems are airway management and respiratory conditions.
Aims and Objectives: The present study was aimed to study spinal anaesthesia in patients with scoliosis at a tertiary hospital.
Materials and Methods: The present study was a prospective, observational study conducted in department of anesthesiology, in patients between age group 18 and 60 years with scoliosis (Cobb’s angle of >15°), American Society of Anesthesiology physical grade I/II, posted for elective, lower limb orthopedic soft tissue release procedures under spinal anesthesia. All details were noted in case proforma and entered in Microsoft excel sheet. Statistical analysis was done using descriptive statistics.
Results: A total of thirty-two patients were included in present study. The mean age was 25.27 ± 4.81 years. Male (63%) were more than female (37%). Male to female ratio 1.7:1. As per American society of anaesthesiologist physical grading grade I patients were 78% while grade II was 22%. The onset of sensory block was in 7.9 ± 2.3 mins and onset of motor block was in 4.9 ± 2 mins. Maximum extent of sensory blockade till T5-T4 was noted in 66% patients. Time taken for complete recovery of motor block to its preoperative level was 94.3 ± 26.2 min.
Conclusion: With proper preoperative assessment, spinal anesthesia can be safely used in patients with scoliosis. Patients with scoliosis needs good preoperative assessment, well equipped setup and team efforts for good outcome.
Management of mandibular condylar fractures by the retromandibular approach – An evaluation of its complications
Authors: Shanmugam Devakumari , Dominic Neil , Thanasekaran Vijhayapriya , Purushothaman Amudha , Sridhar Dinesh , Shanmugam Devameena
Published: February 2021

Background: Mandibular condyle fractures are commonly encountered in the practice of maxillofacial surgeon. Even though being a commonly seen fracture, the fracture condyle of the mandible demands meticulous diagnosis and a tailor made treatment plan for each and every patient. The treatment plan largely depends on the age of the patient and the displacement of the fractured fragment. This retrospective study provides an insight in to the management of fracture mandibular condyle by retromandibular approach.
Aims and Objectives: The aim of this study was to evaluate the complications of the retromandibular transparotid approach in surgically operated patients with mandibular condylar fractures.
Materials and Methods: A retrospective study was performed by analyzing the treatment records of patients who underwent open reduction and internal fixation (ORIF) by the retromandibular transparotid approach for seven years. Thirty-five patients who fulfilled the criteria were included in the study. Clinical parameters such as marginal mandibular nerve weakness, sialocele, occlusal derangement and decreased mouth opening were recorded during the first, fourth and twelfth weeks postoperatively. The retrieved data were analyzed for complications of the retromandibular approach in the management of mandibular condylar fractures.
Results: In patients (N= 35) who underwent ORIF by the retromandibular transparotid approach, findings recorded at the end of the first week included 5 patients with sialocele, 2 patients with derangement of occlusion, 6 patients with restricted mouth opening and 1 patient with marginal mandibular nerve weakness. However, postoperatively, at the end of 4 weeks, the only complication observed was sialocele in 3 patients. Furthermore, at the end of 12 weeks, sialocele had completely resolved in all 3 patients, and they were free of complications.
Conclusion: The retromandibular transparotid approach is a reliable and straightforward technique with manageable complications.
Necrotizing histiocytic lymphadenitis due to three cases applying with painful cervical lymphadenopathy
Authors: Yardimci Bulent
Published: February 2021

Necrotizing Histiocytic Lymphadenitis (NHL)is an idiopathic reason of lymphadenopathy which rather affects the young population. In this article, 3 cases which have applied to our Internal Medicine Policlinic with painful lymphadenopathy within four months and which were diagnosed with NHL have been presented and their clinical features discussed.
Reflexões sobre o processo educativo em tempos de pandemia através das percepções de pós-graduandos em educação
Authors: Richard de Paulo Jacks , Maris Mendes Siqueira Araújo Stela , Daniele de Oliveira Priscila
Published: February 2021

Esta pesquisa foi desenvolvida com o intuito de refletir sobre a situação e desdobramentos do período de oferta de ensino remoto emergencial devido ao COVID19 a partir da percepção de alunos de mestrado e doutorado na área de educação, matriculados em uma instituição pública de ensino, situada no interior do estado de Minas Gerais - Brasil. Para tal, efetuou-se uma revisão junto à literatura acadêmica que trata sobre a temática investigativa, para compreender as peculiaridades das percepções e analisá-las à luz da literatura. Os dados foram obtidos através de uma entrevista virtual com o intuito de potencializar a diálogo com os discentes e com o propósito de coletar informações sobre a percepção dos alunos em relação à experiência vivenciada com o ensino remoto emergencial. Os dados da pesquisa revelaram que as percepções convergem no sentido de que as tecnologias podem contribuir para a aprendizagem, principalmente, no contexto atual de pandemia. Por fim, demonstrou-se também por meio da percepção discente que tais recursos tecnológicos não são capazes de suprimir por completo os espaços de socialização característicos do ensino presencial.
Desafíos docentes durante la Pandemia de COVID-19
Authors: Alejandra Salazar Herrera Victoria , Da Silva Siony , Rocha dos Santos Carlos Eduardo , Petrolini de Oliveira Ligia
Published: February 2021

El objetivo de este artículo fue identificar las percepciones de los docentes sobre elmodelo de enseñanza no presencial utilizado durante la pandemia de COVID-19. Lainvestigación realizada fue de tipo cuali-cuantitativo, considerando una revisiónbibliográfica y un cuestionario online, elaborado en la plataforma Google Forms. Laspreguntas se referían al perfil y desempeño profesional, con base en el escenarioacadémico y el distanciamiento social por la pandemia, con un enfoque en lasherramientas y estrategias utilizadas, así como en las percepciones de los docentes. Losresultados mostraron que las herramientas más utilizadas fueron la conferencia web ylas videoaulas, y entre las herramientas se destacaron Google Meet, Zoom y las redessociales. La mayoría de los docentes recibieron apoyo tecnológico, capacitación de lainstitución donde trabajan, o apoyo de sus colegas, y utilizaron tareas como una formade evaluar el aprendizaje. Las principales ventajas atribuidas a este modelo deenseñanza fueron la posibilidad de pasar más tiempo con la familia y no tener quedesplazarse hasta su lugar de trabajo. Las principales desventajas señaladas fueron ladesmotivación de los estudiantes, el cansancio de los profesores y la sensación de tenerla obligación de responder preguntas en cualquier momento. La investigación señalócomo problemas principales, el desánimo de los estudiantes y los problemas técnicos oestructurales. Frente a los avances tecnológicos, la pandemia aceleró un proceso detransformación y adaptación de la educación ya que era necesario, mostrando el papel del docente como facilitador de los procesos de enseñanza y aprendizaje durante la evolución de la tecnología, y del alumno como ser autónomo.
Educational challenges and advances in times of COVID-19
Authors: Lucena Juliana , Edirisingha Palitha
Published: February 2021

When the first news about an unknown deadly disease in China reached the headlinesof the most accessed media on this side of the planet, none of us could imagine to be held hostage to a tiny little thing like a virus for such a long time. Yet, as we reach theanniversary of the first case reported in Wuhan, we are still learning how to managethe multiple tasks and challenges in daily life hoping for the first vaccines to be releasedin most countries.During this year many of us had to deal with uncertainty, personal losses, sadness,anxiety, a near to endless list of negative feelings that have and are impacting ourrelationships in personal life as well as at workplace. Work began to take place at home, which became our 24/7 office when we talk about educators.
Glossário em Libras como instrumento para auxiliar na inclusão de alunos surdos
Authors: Cunha Mariane Maria de Carvalho , Franco Raquel Aparecida Soares Reis
Published: February 2021

Este artigo apresenta o site, Glossário em Libras, que é o produto educacional desenvolvido no Programa de Mestrado Profissional em Educação Profissional e Tecnológica (ProfEPT), do Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais – campus Ouro Branco. O referido produto educacional objetivou divulgar a língua de sinais no ambiente escolar, de modo a incentivar a comunicação entre surdos e ouvintes. Além disso, buscou contribuir para a autonomia do estudante surdo na escola, de forma que este estudante consiga realizar suas solicitações e obtenha as informações de que necessita nos mais diversos setores da escola, sem necessitar a todo momento da ajuda de um profissional intérprete. Para isso, recorreu-se metodologicamente a Wolcott (1994) para a realização da descrição, da análise e interpretação de todo o processo de construção, desenvolvimento e avaliação do site Glossário em Libras, além de abordar como ocorreu a percepção da necessidade de elaboração desse produto. A avaliação do glossário comprovou que o produto é útil, necessário e contribui para a divulgação da Libras na escola e para a autonomia do estudante surdo. Além disso, o produto se mostrou eficaz por sensibilizar as pessoas para as questões relacionadas ao universo surdo.
O papel dos saberes docentes na formação pedagógica da licenciatura em Química:
Authors: Marinho Alane da Silva , Andrade da Silva Wanderson Diogo , Matias de Paula Neidimar Lopes
Published: February 2021

Este estudo foi desenvolvido em um curso de licenciatura em Química de uma Instituição Federal de Ensino Superior do interior do Ceará e teve como objetivo analisar a percepção dos seus professores formadores quanto o papel dos saberes docentes na formação dos seus alunos, futuros professores de Química, bem como discutir a importância desses saberes para a construção da identidade docente. Participaram da pesquisa seis professores da área específica e dois da área pedagógica através da aplicação de um questionário, sendo os dados analisados através da a análise textual discursiva. Constatou-se uma concepção variada sobre estes saberes, incorporando ideais reducionistas e tecnicistas até percepções mais amplas do trabalho docente, sendo, portanto, necessárias mudanças epistemológicas entre os professores formadores.