bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE TGT BERBASIS KEARIFAN LOKAL TRI HITA KARANA TERHADAP HASIL BELAJAR
Authors: Yunita Ni Komang Devi , Tristiantari Ni Ketut Desia
Published: September 2019

Penelitian ini bertujuan untuk mengetahui pergaruh hasil belajar IPA antara kelompok siswa yang dibelajarkan dengan model pembelajaran kooperatif tipe TGT berbasis Tri Hita Karana. Penelitian ini adalah penelitian eksperimen semu (Quasi Eksperimen ), dengan desain penelitian non equivalent post-test only control group design. Populasi penelitian ini berjumlah 166 orang. Sampel penelitian ini adalah siswa kelas V SD Negeri 1 Banjar sebanyak 24 orang dan siswa kelas V SD Negeri 8 Banjar sebanyak 28 orang. Sampel ditentukan menggunakan teknik simple random sampling. Data hasil belajar yang diperoleh dianalisis menggunakan teknik analisis statistik deskriptif dan statistik inferensial. Berdasarkan hasil penghitungan Uji-t dengan menggunakan Independent Samples Test menunjukkan thitung = 4,246 > ttabel = 2,00. Selanjutnya rata - rata kelompok eksperimen yaitu 22,04 lebih besar dari rata - rata kelompok kontrol yaitu 18,75.  Hal ini menunjukkan bahwa terdapat perbedaan yang signifikan pada hasil belajar IPA antara kelompok siswa yang dibelajarkan dengan model pembelajaran kooperatif tipe Team Games Tournament berbasis Tri Hita Karana dan kelompok siswa yang dibelajarkan dengan tidak menggunakan model pembelajaran kooperatif tipe Team Games Tournament berbasis Tri Hita Karana pada kelas V SD di Gugus IV Kecamatan Banjar Kabupaten Buleleng. Dengan demikian, model pembelajaran kooperatif tipe TGT berbasis Tri Hita Karana karana berpengaruh terhadap hasil belajar IPA siswa kelas V SD di Gugus IV Kecamatan Banjar Kabupaten Buleleng Tahun Pelajaran 2018/2019.
PENGEMBANGAN MEDIA PEMBELAJARAN BERBASIS GEOGEBRA UNTUK PEMBELAJARAN PERSAMAAN LINIER DUA VARIABEL DI SMP
Authors: Putra I.P.D. , . Sariyasa , Sukajaya I.N.
Published: September 2019

Penelitian pengembangan ini bertujuan untuk: (1) Mendeskripsikan rancangan media pembelajaran persamaan linier dua variabel; (2) Mendeskripsikan hasil implementasi media pembelajaran menggunakan GeoGebra sebagai media eksplorasi, Lectora Inspire sebagai aplikasi pembuat layout dan latihan soal; (3) Mengetahui kevalidan, kepraktisan, dan keefektifan media Pembelajaran persamaan linier dua variabel. Model pengembangan yang digunakan adalah Model ADDIE yang terdiri dari tahap analysis, design, develop, implementation, evaluation. Teknik analisis data yang digunakan adalah teknik analisis data deskriptif kualitatif dan deskriptif kuantitatif.  Hasil penelitian menunjukkan bahwa media pembelajaran yang dikembangkan dapat diterima sebagai media pembelajaran dengan rata-rata skor dari ahli perangkat pembelajaran sebesar 2,70 dengan kriteria valid, dan rata-rata skor dari ahli materi sebesar 2,66 dengan kriteria valid. Rata-rata skor kepraktisan media pembelajaran berdasarkan analisis angket respon siswa sebesar 3,24 dengan kriteria baik dan rata-rata kepraktisan berdasarkan angket respon guru sebesar 3,30 dengan kriteria baik. Persentase skor efektivitas dari kelompok siswa yang dipilih secara random sebesar 93,33% dan telah memenuhi kriteria ketuntasan klasikal. Berdasarkan hasil penelitian tersebut dapat disimpulkan bahwa media yang dikembangkan dapat diterima sebagai media pembelajaran dan diharapkan dapat digunakan sebagai media pembelajaran pada topik bahasan persamaan linier dua variabel baik oleh siswa maupun guru.
PENINGKATAN PEMAHAMAN KONSEP MATEMATIKA SISWA MELALUI PENERAPAN MODEL PEMBELAJARAN AIR DISERTAI PENILAIAN PORTOFOLIO
Authors: Patni L. Diah Praba , Parwati N. N , Suharta I. G. P
Published: September 2019

Penelitian ini bertujuan untuk mendeskripsikan: (1) peningkatan pemahaman konsep matematika siswa melalui penerapan model pembelajaran AIR disertai penilaian portofolio, (2) tanggapan siswa terhadap penerapan model pembelajaran AIR disertai penilaian portofolio. Penelitian tindakan kelas ini dilaksanakan dalam tiga siklus, masing – masing siklus terdiri dari tahap perencanaan, pelaksanaan, observasi/evaluasi, dan refleksi. Subjek penelitian ini adalah siswa kelas VII-i SMP Negeri 5 Singaraja sebanyak 28 orang siswa pada semester genap Tahun Ajaran 2016/2017. Data pemahaman konsep matematika siswa dikumpulkan menggunakan tes pemahaman konsep dan tanggapan siswa terhadap penerapan model pembelajaran AIR disertai penilaian portofolio dikumpulkan menggunakan angket. Data yang telah terkumpul selanjutnya dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa persentase ketuntasan nilai pemahaman konsep matematika siswa mengalami peningkatan dari siklus ke siklus, yakni 32% pada siklus I, 54% pada siklus II, dan 79% pada siklus III. Peningkatan optimal terjadi pada siklus III dengan persentase ketuntasan sebesar 79% dan rata – rata skor tanggapan siswa berada dalam kategori positif. Peningkatan optimal yang terjadi pada siklus III karena guru menekankan pada: (1) Memberikan motivasi dan dorongan pada siswa untuk aktif dalam pembelajaran, (2) Memperbanyak latihan soal dengan memberikan latihan, kuis dan tugas rumah untuk menerapkan konsep, (3) Memberi pertanyaan – pertanyaan yang berkaitan dengan konsep lama yang telah dipelajari untuk mempermudah memahami konsep baru yang akan dipelajari, dan (4) Penilaian portofolio yang dapat membantu siswa melakukan refleksi diri serta membantu guru memantau perkembangan siswa terkait pemahaman terhadap materi yang telah diberikan. Kata kunci: model pembelajaran AIR, penilaian portofolio, pemahaman konsep matematika
PENGARUH MODEL PEMBELAJARAN INVESTIGASI KELOMPOK BERBANTUAN LKPD TERHADAP KEMAMPUAN BERPIKIR KRITIS MATEMATIKA SISWA KELAS VIII SMP NEGERI 2 SAWAN
Authors: Krisnahari K. L , Astawa G.R. I. W. P , Gita I. N
Published: September 2019

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh model investigasi kelompok berbantuan LKPD terhadap kemampuan berpikir kritis matematika siswa kelas VIII SMP Negeri 2 Sawan. Jenis penelitian ini adalah penelitian eksperimen semu. Populasi dalam penelitian ini adalah seluruh siswa kelas VIII SMP Negeri 2 Sawan tahun ajaran 2018/2019. Sampel penelitian ditentukan dengan teknik sampel rumpun  dan didapatkan 2 kelas sampel, yaitu kelas VIIIA sebagai kelas eksperimen dan kelas VIIIB sebagai kelas kontrol. Instrumen penelitian berupa tes kemampuan berpikir kritis berupa empat butir soal uraian. Data hasil tes kemampuan berpikir kritis matematika dianalisis menggunakan uji-t satu ekor dengan taraf siginifikansi 5%. Hasil penelitian  menunjukkan bahwa sehingga  ditolak. Ini berarti, kemampuan berpikir kritis matematika siswa yang dibelajarkan dengan model pembelajaran investigasi kelompok berbantuan LKPD lebih baik daripada kemampuan berpikir kritis matematika siswa yang dibelajarkan dengan  pembelajaran konvensional. Dengan demikian, dapat disimpulkan bahwa terdapat pengaruh model pembelajaran investigasi kelompok berbantuan LKPD terhadap kemampuan berpikir kritis matematika siswa. Kata kunci: Investigasi kelompok, LKPD, kemampuan berpikir kritis AbstractThis study aims to determine the effect of the LKPD-assisted group investigation model on mathematical critical thinking skills of students at SMPN 2 Sawan. The type of this study was a quasi-experiment. The population of this study is all students of class VIII SMPN 2 Sawan in the academic year 2018/2019. The samples were determined by cluster sampling and acquired 2 sample class, grade VIIIA  as experimental group and grade VIIIB as control group. The research instrument consisted of a critical thinking skills test in the form of four item  description.  Data from the test results of mathematical critical thinking ability were analyzed using one-tailed t-test with a significance level of 5%. The result showed that the was rejected. This means that mathematical critical thinking abilitifes who are taught by group investigation model supported by LKPD are better than students mathematica critical thinking abilitifes taught by conventional learning, so it can be conclude that there is an effect of group investigation learning model supported by LKPD to students mathematical critical thinking abilities.Keywords: Group investigation model, LKPD, mathematical critical thinking skill
Pengaruh Model Contextual Teaching and Learning Berbantuan Masalah Realistis Terhadap Keterampilan Berpikir Kritis IPA
Authors: Paramita.A Ni Luh Putu Aninditha , Japa I Gusti Ngurah , Sudatha I Gde Wawan
Published: September 2019

Penelitian ini dilakukan berdasarkan masalah pembelajaran yang pasif. Penelitian ini bertujuan untuk mengetahui pengaruh model Contextual Teaching and Learning berbantuan masalah realistis terhadap keterampilan berpikir kritis IPA siswa kelas IV Gugus II Teuku Umar Denpasar Barat Tahun Pelajaran 2018/2019. Jenis penelitian ini merupakan eksperimen semu dengan rancangan penelitian Non Equivalent Post-test Only Control Group Design. Populasi dari penelitian ini adalah seluruh siswa kelas IV SD Gugus II Teuku Umar Denpasar Barat dengan jumlah 240 siswa. Penentuan sampel dalam penelitian ini menggunakan teknik random sampling. Sampel dalam penelitian ini adalah siswab kelas IV SDN 13 Dauh Puri dengan jumlah 42 siswa sebagai kelompok eksperimen dan siswa kelas IV SDN 14 Dauh Puri dengan jumlah 40 siswa sebagai kelompok kontrol. Data keterampilan berpikir kritis IPA dikumpulkan dengan instrumen berupa tes essay berjumlah 10 soal yang telah divalidasi. Data yang diperoleh dianalisis dengan menggunakan metode statistik deskriptif dan statistik inferensial kemudian uji hipotesis menggunakan uji t. Berdasarkan hasil analisis data diperoleh thitung = 6,144 lebih besar dari ttabel (pada taraf signifikan 5%) = 1,988. Dilihat dari hasil perhitungan rata-rata berpikir kritis kelompok eksperimen adalah 87,245 lebih besar dari hasil rata-rata berpikir kritis kelompok kontrol yaitu 78,4. Dengan demikian berdasarkan hasil analisis data tersebut disimpulkan model CTL berbantuan masalah realistis berpengaruh terhadap keterampilan berpikir kritis IPA siswa kelas IV Gugus II Teuku Umar Denpasar Barat Tahun Pelajaran 2018/2019.Kata Kunci : Contextual Teaching and Learning, IPA, keterampilan berpikir kritis, masalah realistis
Pengaruh Model Pembelajaran Bamboo Dancing Terhadap Keterampilan Berpikir Kritis Pada Pembelajaran IPA
Authors: Pujiani N.L  Nopi , Sudarma I Komang , Murda I Nyoman
Published: September 2019

Permasalahan rendahnya keterampilan berpikir kritis IPA siswa kelas V di Gugus V Kecamatan Kintamani menjadi masalah utama dilakukannya penelitian ini. Rendahnya keterampilan berpikir kritis karena pembelajaran yang masih berpusat pada guru sehingga siswa kurang mampu menemukan pengetahunnya sendiri. Oleh karena itu, penelitian ini dilakuakn dengan tujuan untuk mengetahui  pengaruh keterampilan berpikir kritis IPA antara kelompok siswa yang dibelajarkan dengan model pembelajaran Bamboo Dancing dan kelompok siswa yang dibelajarkan dengan pembelajaran konvensional pada siswa kelas V di Gugus V Kintamani, Kecamatan Kintamani Tahun Pelajaran 2017/2018. Jenis penelitian ini adalah eksperimen semu, dengan desain Nonequivalen Post Test Only Control Group Desaign. Populasi dalam penelitian ini adalah seluruh kelas V SD di Gugus V Kintamani tahun pelajaran 2017/2018 yang berjumlah 176. Sampel penelitian yaitu kelas V SDN Daup sebagai kelompok eksperimen yang berjumlah 22 siswa dan kelas V SDN 1 Belantih sebagai kelas kontrol yang berjumlah 20 siswa, diperoleh dengan teknik random sampling melalui cara undian kelas. Metode yang digunakan dalam penelitian ini adalah metode tes. Data yang dikumpulkan dianalisis menggunakan statistik deskriptif dan statistik infrensial (uji-t). Hasil penelitian menunjukkan bahwa thit =9,625 dan ttab=(pada taraf signifikan 5%) 2,021. Hal ini berarti Thitung > Ttabel , sehingga terdapat pengaruh keterampilan berpikir kritis antara siswa yang belajar dengan model pembelajaran Bamboo Dancing dengan siswa yang dibelajarankan dengan pembelajaran konvensional. Berdasarkan hal tersebut, dapat disimpulkan bahwa model pembelajaran Bamboo Dancing berpengaruh terhadap keterampilan berpikir kritis IPA siswa. Kata Kunci : Bamboo Dancing, Berpikir Kritis, IPA.
ANALISIS KEPEMILIKAN ASING DAN STRATEGI PENGENDALIAN DOMINASINYA DALAM PEREKONOMIAN INDONESIA
Authors: Tayibnapis Ahmad Zafrullah
Published: September 2019

Investasi kepemilikan asing ternyata cukup dominan dalam perekonomian Indonesia, khususnya pada sektor- sektor ekonomi strategis. Dominasi investasi kepemilikan asing di Indonesia sangat mengganggu kedaulatan ekonomi dan perwujudan demokrasi ekonomi sebagaimana termaktub dalam Pasal 33 Ayat (3) UUD 1945 yang secara jelas menyebutkan bahwa bumi, isi, dan kekayaan alam yang terkandung di dalamnya dikuasai oleh negara untuk sebesar-besar kemakmuran rakyat. Basis kulturalis bangsa Indonesia adalah kekeluargaan dan kolektivisme, ini berarti liberalisme sangat tidak tepat untuk diterapkan di Indonesia.
COOPERATIVE-CLASSROOM ACTIVITIES TO IMPROVE STUDENTS’ COMPREHENSION IN LANGUAGE ACQUISITION
Authors: Rachmasari Devi
Published: September 2019

Joyful and cooperative learning athmosphere will truly imboost students’ learning. Moreover over past sixty years the language teaching focus shift to students centered learning. Indeed cooperative learning is mostly advocated. In cooperative learning, students develop their own understanding of teaching materials while at the same time, they also encourage and help their friends in the same groups to comprehend teaching materials and get better understanding. All group members must be active and have responsibility to achieve group’s goal. The role of teachers to monitor the group process and result is essential so there will be no dependent member.Most study showed that cooperative learning is able to encourage students to overcome their difficulties in language learning since peer discussion and peer support help them. Thus, students’ comprehension in language learning improves.
KAJIAN BENTUKAN FISIK KEMASAN MINUMAN TEH SIAP SAJI
Authors: Herdiana Wyna
Published: September 2019

Numerous innovations of form have been developed by ready-to-drink tea producers for variety of flavours. The highly competitive market for this product demands the producers to develop more distinctive product for consumers. This research was using qualitative approach with qualified quantitative data. Questionnaire and tactile testing were done to gather data. The questionnaires were given to respondents with age range of 11- 17 years  and 1733 yearsold. The respondents are also given tactile test for each packaging, for ready-to-drink tea. The target market for this research was young consumer with often-outdoor activities. Therefore they need abundant liquid intake. Nutrition rich tea in ready-to-drink packaging is one of solution for practical drink.With a high activity tendency, it is logical that the most preferred packaging for ready-to-drink tea is PET bottle. This type of packaging is easy to carry, easy storage for later consumption and hygienic in consumers perception. PET bottle is also could give better fresh sensation compared to other packaging. In specific, consumers like bottle with small diameter and tall opening. Bottle cap with rubber layer is more preferred because has it has maximum closure. For structure, bottle with curvy form, 60 degrees shoulder bottle, vertical and slanting shoulder is considered more attractive.
METROSEKSUAL SEBAGAI KOMUNIKASI FASHION PRIA URBAN
Authors: W. Waluyo Prayogo
Published: September 2019

Salah satu fenomena yang terjadi dikebanyakan kota besar atau masyarakat urban adalah metroseksual yang terjadi pada kaum pria urban merupakan gejala perkembangan budaya yang sedang terjadi di negara-negara maju. Bukan hal yang jamak melihat pusat-pusat perawatan kecantikan dipenuhi oleh kaum pria yang sekedar ingin membersihkan wajah dari jerawat, atau melihat beberapa pria berpenampilan stylish sedang melakukan pleasure shopping. Dalam kajian jender, pria metroseksual tergolong dalam jender maskulin yang sifatnya sedikit bergeser ke arah feminin, dimana para pria metroseksual ini dianggap sangat mengerti bagaimana merawat tubuhnya. Setelah tren metroseksual terbentuk, maka hal ini akan diikuti oleh pembentukan pasar metroseksual, berbagai produk perawatan tubuh diciptakan untuk menyokong penampilan kaum pria, hal ini dapat dilihat dari menjamurnya produk-produk perawatan tubuh yang menggunakan label for men, bukan hanya sebatas sabun atau deodoran saja, namun sampai ke produk-produk yang sebelumnya tidak pernah disentuh oleh kaum pria seperti krim wajah, masker, bahkan pelembab wajah. Pria metroseksual menaruh perhatian lebih kepada penampilan, ia cenderung memiliki kepekaan mode dan memilih pakaian berkualitas atau bermerek, serta memiliki kebiasan merawat diri (grooming) atau kebiasaan-kebiasaan yang dahulu lazimdikaitkan dengan kaum perempuan. Fashion yang kita kenakan mencerminkan tentang siapa diri kita. Fashion bukanlah sesuatu yang nyata, tetapi dapat kita ungkapkan secara nyata melalui pakaian. Fashion sendiri merupakan suatu cara komunikasi yang dilakukan untuk mendeskripsikan penampilan.. Penampilan itumerupakan keadaan diri dari ujung rambut sampai ujung kaki yang tampak dan dapat dilihat oleh mata kita.
ATRIBUT AGAMA, PENGUASA EKONOMI DAN KEKUATAN MEDIA DALAM ACARA X FACTOR INDONESIA
Authors: Sujatmiko Guguh
Published: September 2019

Fatin Sidqia Lubis phenomenon, a little girl with jilbab who have distinctive voice in an Indonesian talent show X Factor Indonesia, can attrack the attention of the people of Indonesia. There are various forms of support for Fatin in the event. The community is involved to contribute through sms poll. Fatin can maintain aprofit stability that flows from the event. Economic authorities control all through the television media freely. This study uses a theory of political economy, power, television as mass media, and postmodern to analyze the phenomenon of X Factor in Indonesia.
Breaking Boundaries: Discovering the Impossible Counterproof of Beal’s Conjecture
Authors: Mohamed Halima Jibril , Zyfi Adela , Futzum Ghedlawit
Published: September 2019

This paper will attempt to logically differentiate between two types of fractions and discuss the idea of Zero as a neutral integer. This logic can then be followed to create a counterexample and a proof for Beal’s conjecture.
El extremismo conservador y la nueva fase globalizada de acumulación de capital
Authors: Gómez Walteros Jaime Alberto , Andrade Rodríguez Bernabé , Banda Mora Ana del Pilar
Published: September 2019

En el presente ensayo se muestra la nueva fase globalizada de acumulación de capital, apoyada y  respaldada por los conglomerados financieros y cuya ideología se sitúa en la extrema derecha internacional. La ideología conservadora tiene sus fuentes en extremismos religiosos, en donde existe un culto al capital y solemnidad sobre quienes lo rigen, así como un desprecio al trabajo. Aquí estriba la gran controversia. A lo largo del ensayo, se señala cómo se ha gestado este monstruo y la dinámica que ha tomado, además de por qué es necesario estudiarlo y enfrentarlo con una alternativa de poder.Palabras clave: Acumulación, Globalización, Capital, Conservatismo. Conservative extremism and the new globalized phase of capital accumulationAbstractIn the present essay the new globalized phase of capital accumulation is shown, supported and backed up by financial conglomerates and whose ideology is situated on the international extreme right. The conservative ideology has its sources in religious extremism, where there is a cult of capital and solemnity over those who regulate it, as well as a contempt for work. Here lies the big controversy. Throughout the essay, it is indicated how this monster has been gestated and the dynamics it has taken, as well as why it is necessary to study it and face it with an alternative of power.Keywords: Accumulation, Globalization, Capital, Conservatism L’extrémisme conservateur et la nouvelle phase globalisée d’accumulation de capitalRésuméDans cet essai, on montre la nouvelle phase globalisée d’accumulation de capital, appuyée et soutenue par les conglomérats financiers et dont l’idéologie se situe dans l’extrême droite internationale. L’idéologie conservatrice a ses sources dans les extrémismes religieux, là où il existe un culte pour le capital et une solennité sur ceux qui le régissent, ainsi qu’un mépris envers le travail. Là repose la grande controverse. Tout au long de l’essai, on signale comment on a conçu ce monstre et la dynamique qu’il a prise, en plus du pourquoi il est nécessaire de l’étudier et l’affronter avec une alternative de pouvoir.Mots clés: Accumulation, Globalisation, Capital, Conservatisme
Viloria de la Hoz, Joaquín. Empresarios del Caribe Colombiano: Historia económica y empresarial del Magdalena Grande y del Bajo Magdalena, 1870-1930
Authors: Batero Portilla Julieth Johanna
Published: September 2019

La obra del economista e historiador Joaquín Viloria De la Hoz, publicada en Bogotá por el  Banco de la República, presenta un amplio y analítico panorama sobre las múltiples actividades económicas que surgieron en la región a finales del siglo XIX y se extendieron hasta las primeras décadas del XX. Sin duda, en breve se convertirá en un referente importante para los estudiosos de la historiografía caribeña.Viloria De la Hoz, Joaquín (2014). Entrepreneurs of the Colombian Caribbean: Economic and business history of the Magdalena Grande and Lower Magdalena, 1870-1930AbstractThe work of the economist and historian Joaquín Viloria De la Hoz, published in Bogotá by the Banco de la República (Bank of the Republic), presents a broad and analytical overview of the multiple economic activities that arose in the region at the end of the 19th century and extended into the first decades of the XX. Without a doubt, it will soon become an important reference for scholars of Caribbean historiography.Viloria De la Hoz, Joaquín (2014).Entrepreneurs du Caraïbe Colombien: Histoire économique et de l’entreprise du Magdalena Grande et du Bajo Magdalena, 1870-1930RésuméL’œuvre de l’économiste et historien Joaquín Viloria De la Hoz, publiée à Bogotá par la Banque de la République, présente un ample et analytique panorama sur les multiples activités économiques qui ont surgit sans la région à la fin du XIXe. siècle et qui se sont répandues jusqu’au début des premières décennies du XXe. siècle. Sans doute, d’ici peu, elle deviendra un important référent pour les studieux de l’historiographie caribéenne.
TEORIAS DA ARGUMENTAÇÃO JURÍDICA E A PRÁTICA DISCURSIVA DO SUPREMO TRIBUNAL FEDERAL: Metodologias Analíticas e Estudo de Casos (AC 4.070/DF e ADI 5526/DF)
Authors: Teles Pires Teresinha Inês
Published: September 2019

O presente artigo tem a intenção de expor, em linhas gerais, os fundamentos e as metodologias da argumentação jurídica, cujo propósito consiste em sedimentar um modelo racional de interpretação das leis, capaz de combater o decisionismo e a arbitraidade judiciais. Em um breve estudo das teorias de Robert Alexy, Neil MacCormick e Klaus Günther, serão esboçados os aspectos convergentes e divergentes de suas premissas e as questões relacionadas à justificação objetiva das decisões jurídicas. Na parte final, serão analisadas, à luz dos critérios lançados pelas mencionadas teorias, duas ações julgadas pelo Supremo Tribunal Federal, com o objetivo de aperfeiçoar as principais razões adotadas pelos juízes e problematizar os acertos e desacertos argumentativos que podem ser extraídos dos seus votos.
A APLICAÇÃO DO PRINCÍPIO DA PROIBIÇÃO DE RETROCESSO NO ÂMBITO DO DIREITO AMBIENTAL DO TRABALHO
Authors: FARIA LEAL CARLA REITA , Rodrigues Débhora Renata Nunes
Published: September 2019

Este artigo tem por escopo versar sobre a aplicação do princípio da proibição de retrocesso socioambiental em matéria  de direito ambiental do trabalho, de modo a analisar se e em que medida essa propicia observância ao dever estatal de proteção do direito fundamental ao meio ambiente de trabalho equilibrado. Para tanto, adotou-se pesquisa bibliográfica e a utilização do método dedutivo, buscando demonstrar a necessidade de efetivação do direito fundamental em destaque para a proteção da dignidade da pessoa humana, o que reflete, consequentemente, na vinculação e limitação da atuação dos poderes estatais em tal seara. Posteriormente, abordou-se o conteúdo essencial do direito fundamental em voga, apresentando-o como limite à possibilidade de restrições, bem como discorreu-se acerca do princípio da proibição do retrocesso socioambiental e qual o nível de proteção que esse possibilita, caso aplicado. A pesquisa possibilitou constatar que o princípio em tela não inviabiliza toda e qualquer alteração pretendida pelo Poder Público, impondo, todavia, a necessidade de observância de critérios, como a aplicação da regra da proporcionalidade, para que haja, v. g., a preservação do conteúdo essencial do direito. Por fim, a pesquisa levou à conclusão de que a aplicação do princípio em destaque, se deveras realizada, possibilita a proteção do conteúdo essencial do direito ao ambiente laboral equilibrado, de maneira a que este não reste fulminado em um cenário de constantes alterações, inclusive legislativas.
OpenMolcas: From Source Code to Insight
Authors: Fdez. Galván Ignacio , Vacher Morgane , Alavi Ali , Angeli Celestino , Aquilante Francesco , Autschbach Jochen , Bao Jie J. , Bokarev Sergey I. , Bogdanov Nikolay A. , Carlson Rebecca K. , Chibotaru Liviu F. , Creutzberg Joel , Dattani Nike , Delcey Mickaël G. , Dong Sijia , Dreuw Andreas , Freitag Leon , Frutos Luis Manuel , Gagliardi Laura , Gendron Frédéric , Giussani Angelo , Gonzalez Leticia , Grell Gilbert , Guo Meiyuan , Hoyer Chad E. , Johansson Marcus , Keller Sebastian , knecht Stefan , Kovačević Goran , Källman Erik , Li Manni Giovanni , Lundberg Marcus , Ma Yingjin , Mai Sebastian , Malhado João Pedro , Malmqvist Per Åke , Marquetand Philipp , Mewes Stefanie A. , Norell Jesper , Olivucci Massimo , Oppel Markus , Phung Quan Manh , Pierloot Kristine , Plasser Felix , Reiher Markus , Sand Andrew M. , Schapiro Igor , Sharma Prachi , Stein Christopher J. , Sørensen Lasse Kragh , Truhlar Donald G. , Ugandi Mihkel , Ungur Liviu , Valentini Alessio , Vancoillie Steven , Veryazov Valera , Weser Oskar , Wesołowski Tomasz A. , Widmark Per-Olof , Wouters Sebastian , Zech Alexander , Zobel J. Patrick , Lindh Roland
Published: September 2019

In this article we describe the OpenMolcas environment and invite the computational chemistry community to collaborate. The open-source project already includes a large number of new developments realized during the transition from the commercial MOLCAS product to the open-source platform. The paper initially describes the technical details of the new software development platform. This is followed by brief presentations of many new methods, implementations, and features of the OpenMolcas program suite. These developments include novel wave function methods such as stochastic complete active space self-consistent field, density matrix renormalization group (DMRG) methods, and hybrid multiconfigurational wave function and density functional theory models. Some of these implementations include an array of additional options and functionalities. The paper proceeds and describes developments related to explorations of potential energy surfaces. Here we present methods for the optimization of conical intersections, the simulation of adiabatic and nonadiabatic molecular dynamics and interfaces to tools for semiclassical and quantum mechanical nuclear dynamics. Furthermore, the article describes features unique to simulations of spectroscopic and magnetic phenomena such as the exact semiclassical description of the interaction between light and matter, various X-ray processes, magnetic circular dichroism and properties. Finally, the paper describes a number of built-in and add-on features to support the OpenMolcas platform with post calculation analysis and visualization, a multiscale simulation option using frozen-density embedding theory and new electronic and muonic basis sets.
Binding thermodynamics of host-guest systems with SMIRNOFF99Frosst 1.0.5 from the Open Force Field Initiative
Authors: Slochower David , Henriksen Niel , Wang Lee-Ping , Chodera John , Mobley David , Gilson Michael
Published: September 2019

Designing ligands that bind their target biomolecules with high affinity and specificity is a key step in small- molecule drug discovery, but accurately predicting protein-ligand binding free energies remains challenging. Key sources of errors in the calculations include inadequate sampling of conformational space, ambiguous protonation states, and errors in force fields. Noncovalent complexes between a host molecule with a binding cavity and a drug-like guest molecules have emerged as powerful model systems. As model systems, host-guest complexes reduce many of the errors in more complex protein-ligand binding systems, as their small size greatly facilitates conformational sampling, and one can choose systems that avoid ambiguities in protonation states. These features, combined with their ease of experimental characterization, make host-guest systems ideal model systems to test and ultimately optimize force fields in the context of binding thermodynamics calculations.

The Open Force Field Initiative aims to create a modern, open software infrastructure for automatically generating and assessing force fields using data sets. The first force field to arise out of this effort, named SMIRNOFF99Frosst, has approximately one tenth the number of parameters, in version 1.0.5, compared to typical general small molecule force fields, such as GAFF. Here, we evaluate the accuracy of this initial force field, using free energy calculations of 43 α and β-cyclodextrin host-guest pairs for which experimental thermodynamic data are available, and compare with matched calculations using two versions of GAFF. For all three force fields, we used TIP3P water and AM1-BCC charges. The calculations are performed using the attach-pull-release (APR) method as implemented in the open source package, pAPRika. For binding free energies, the root mean square error of the SMIRNOFF99Frosst calculations relative to experiment is 0.9 [0.7, 1.1] kcal/mol, while the corresponding results for GAFF 1.7 and GAFF 2.1 are 0.9 [0.7, 1.1] kcal/mol and 1.7 [1.5, 1.9] kcal/mol, respectively, with 95% confidence ranges in brackets. These results suggest that SMIRNOFF99Frosst performs competitively with existing small molecule force fields and is a parsimonious starting point for optimization.
Highly Permeable Perfluorinated Sulfonic Acid Ionomers for Improved Electrochemical Devices: Insights into Structure-Property Relationships
Authors: Katzenberg Adlai , Chowdhury Anamika , Fang Minfeng , Weber Adam Z. , Okamoto Yoshiyuki , Kusoglu Ahmet , Modestino Miguel
Published: September 2019

Rapid improvements in polymer-electrolyte fuel-cell (PEFC) performance have been driven by the development of commercially available ion-conducting polymers (ionomers) that are employed as membranes and catalyst binders in membrane-electrode assemblies. Commercially available ionomers are based on a perfluorinated chemistry comprised of a polytetrafluoroethylene (PTFE) matrix that imparts low gas permeability and high mechanical strength but introduces significant mass-transport losses in the electrodes. These transport losses currently limit PEFC performance, especially for low Pt loadings. In this study, we present a novel ionomer incorporating a glassy amorphous matrix based on a perfluoro(2-methylene-4-methyl-1,3-dioxolane) (PFMMD) backbone. The novel backbone chemistry induces structural changes in the ionomer, restricting ionomer domain swelling under hydration while disrupting matrix crystallinity. These structural changes slightly reduce proton conductivity while significantly improving gas permeability. The performance implications of this tradeoff are assessed, which reveal the potential for substantial performance improvement by incorporation of highly permeable ionomers as the functional catalyst binder. These results underscore the significance of tailoring material chemistry to specific device requirements, where ionomer chemistry should be rationally designed to match the local transport requirements of the device architecture.
Chemogenetic Control of Protein Anchoring to Endomembranes in Living Cells with Lipid-Tethered Small Molecules
Authors: Nakamura Akinobu , Katahira Rika , Sawada Shunsuke , Shinoda Eri , Kuwata Keiko , Yoshii Tatsuyuki , Tsukiji Shinya
Published: September 2019

The Self-localizing Ligand-Induced Protein Translocation(SLIPT) system is an emerging platform that controls protein localization in living cells using synthetic self-localizing ligands (SLs). Here, we report a chemogenetic SLIPT system for inducing protein translocation from the cytoplasm to the surface of the endoplasmic reticulum (ER) and Golgi membranes, referred to as endomembranes.By screening a series of lipid-trimethoprim (TMP) conjugates, we found oleic acid-tethered TMP (oleTMP) to be the optimal SL that efficiently relocated and anchored Escherichiacoli dihydrofolate reductase (eDHFR)-fusion proteins toendomembranes. We showed that oleTMP mediated protein anchoring to endomembranes within minutes and could be reversed by the addition of free TMP. We also applied the endomembrane SLIPT system to artificially activate endomembrane Ras and inhibit the active nuclear transport of extracellular signal-regulated kinase (ERK), demonstrating its applicability for manipulating biological processes in living cells. We envision that the present oleTMP-based SLIPT system, which affords rapid and reversible control of protein anchoring to endomembranes, will offer a new unique tool for the study and control of spatiotemporally regulated cell signaling processes.
BAND NN: A Deep Learning Framework For Energy Prediction and Geometry Optimization of Organic Small Molecules
Authors: Laghuvarapu Siddhartha , Pathak Yashaswi , Priyakumar U. Deva
Published: September 2019

Recent advances in artificial intelligence along with development of large datasets of energies calculated using quantum mechanical (QM)/density functional theory (DFT) methods have enabled prediction of accurate molecular energies at reasonably low computational cost. However, machine learning models that have been reported so far requires the atomic positions obtained from geometry optimizations using high level QM/DFT methods as input in order to predict the energies, and do not allow for geometry optimization. In this paper, a transferable and molecule-size independent machine learning model (BAND NN) based on a chemically intuitive representation inspired by molecular mechanics force fields is presented. The model predicts the atomization energies of equilibrium and non-equilibrium structures as sum of energy contributions from bonds (B), angles (A), nonbonds (N) and dihedrals (D) at remarkable accuracy. The robustness of the proposed model is further validated by calculations that span over the conformational, configurational and reaction space. The transferability of this model on systems larger than the ones in the dataset is demonstrated by performing calculations on select large molecules. Importantly, employing the BAND NN model, it is possible to perform geometry optimizations starting from non-equilibrium structures along with predicting their energies.
Synthesis of a Structurally Perfect d1 Kagome Lattice Antiferromagnet, (CH3NH3)2NaTi3F12
Authors: Jiang Ningxin , Ramanathan Arun , Bacsa John , La Pierre Henry
Published: September 2019

S = 1 /2 kagome lattice antiferromagnets (KLAFs) have attracted great interest since they are closely associated with the long-sought quantum spin liquid (QSL) state. The realization of S = 1/2 KLAF remains an outstanding challenge and efforts have focused principally on Cu2+, d9 compounds. Herein, the synthesis of the first structurally perfect d1 KLAF, (CH3NH3)2NaTi3F12, is presented. The trivalent oxidation state and the Jahn-Teller distortion of Ti3+ ions are probed by single crystal X-ray diffraction, X- ray photoelectron spectroscopy, and UV-vis-NIR diffuse reflectance. No structural phase transitions can be observed from 1.8 K to 523 K. However, a glass transition can be observed due to the disordered, interlayer CH3NH3+ cations. The Curie-Weiss temperature, θcw= -139.5(7) K, and the lack of long-range ordering in magnetic susceptibility and specific heat imply that this compound is a QSL candidate.
Impact of Approximate DFT Density Delocalization Error on Potential Energy Surfaces in Transition Metal Chemistry
Authors: Liu Fang , Kulik Heather
Published: September 2019

For approximate density functional theory (DFT) to be useful in catalytic applications of transition metal complexes, modeling strategies must simultaneously address electronic, geometric, and energetic properties of the relevant species. We show that for representative transition metal triatomics (MO2, where M = Cr, Mn, Fe, Co, or Ni) and related diatomics the incorporation of Hartree–Fock (HF) exchange in most cases improves the properties of the Born–Oppenheimer potential energy surface (PES) with respect to accurate experimental or CCSD(T) references. We rationalize this observation by noting reduced delocalization obtained with hybrid functionals (20–40% HF exchange), as evidenced by reduced hybridization of non-bonding orbitals and increases in metal partial charges. Although we show that the optimal exchange fraction is both property and system specific, incorporating HF exchange synergistically improves properties of density, structure, and energetics within a single PES characterized by moderately covalent bonding. The same improvement is not observed in the ordering of MO2 spin states, as good agreement of semi-local DFT spin state ordering is worsened by over stabilization of higher spin states when HF exchange is added. More work is needed to understand minimal functional forms capable of improving multiple properties with respect to semi-local DFT descriptions of transition metal chemistry.
Synthesis of Trans-2-Substituted-Cyclopropylamines from α-Chloroaldehydes
Authors: West Michael , Mills L. Reginald , McDonald Tyler , Lee Jessica , Ensan Deeba , Rousseaux Sophie
Published: September 2019

Cyclopropylamines are prevalent motifs in pharmaceuticals and agrochemicals. Herein, we report the synthesis of trans-2-substituted-cyclopropylamines in high diastereoselectivity from readily available α-chloroaldehydes. The reaction proceeds via trapping of an electrophilic zinc homoenolate with an amine followed by ring-closure to generate the cyclopropylamine product. We have also observed that cis/trans-isomerization of the cyclopropylamine can occur in the presence of zinc halide salts and that this process can be turned off by the addition of a polar aprotic co-solvent to the reaction.
Solving the Problem of Aqueous pKa Prediction for Tautomerizable Compounds Using Equilibrium Bond Lengths
Authors: Caine Beth A. , Bronzato Maddalena , Fraser Torquil , Kidley Nathan , Dardonville Christophe , Popelier Paul
Published: September 2019

Our new pKa predictor called AIBL outperforms Marvin for the well-known challenge of tautomerizable compounds. The powerful descriptors used here are simply ab initio equilibrium bond lengths. We also correct the literature experimental value for the herbicide Profoxydim, from a previous value 5.91 to a new value of 4.82. This is a fine and rare example of theory correcting experiment.
Aurivillius Halide Perovskite: A New Family of Two-Dimensional Materials for Optoelectronic Applications
Authors: Zhao Shuai , Lan Chunfeng , Li Huanhuan , Zhang Chu , Ma Tingli
Published: September 2019

Layered perovskites have attracted considerable attention in optoelectronic applications due to their excellent electronic properties and stability. In this work, the quasi-2D aurivillius halide perovskites are investigated using density functional theory. The single-layer aurivillius perovskite Ba2PbI6 is predicted to have a direct bandgap of 1.89 eV, which is close to that of the Ruddlesden–Popper perovskite Cs2PbI4. The electronic structures near the Fermi level are mainly governed by the [PbX6] octahedra, which leads to similar electronic properties to that of Cs2PbI4. Decomposition energies reveal that these aurivillius perovskites exhibit thermal instability. Increasing the number of [PbX6] octahedra layer can enhance the stability and reduce the bandgap. Bi- and In-based aurivillius perovskites are also calculated to evaluate the Pb-free alternatives. These calculations can serve as a theoretical support in exploring novel layered perovskites.
Preparation of a polymeric aggregate of unsaturated polystyrene with sawdust and studying its physical and mechanical properties
Authors: Ebtehag Zeki Sulyman  , Hamid A. Salih  , Thaer Abed Hallow
Published: September 2019

In this study a type of polymeric composites from melting poly Unsaturated polyester as a basic substance with powdered sawdust was prepared, studying some of it is mechanical properties, which was included: Impact Strength (I.), Yong modulus (E), hardness (B.) and compression Strength (C.). Polymeric composites before and after reinforcing were studied by comparison between them. It was noticed increasing resistance of Yong modulus (E), Impact Strength (I.), hardness (B.) and compression Strength (C.). Also, It is studied the effect of some acids like (, H2SO4, HNO3) with concentrations (0.5 N; 1N and 1.5N) respectively. Some physical properties were studied as absorbance and poly 's diffusion coefficient before and after reinforcing. The results showed increases in values of these properties with increasing concentration of acid and time of polymer's immersion in the acidic solution.
THE EFFECTIVINESS OF CHEMICAL PRACTICUM KIT TO TRAIN SCIENCE PROCESS SKILL IN 10TH GRADE
Authors: Ningsih Rani Kurnia , Hidayah Rusly
Published: September 2019

The purpose of this study was to obtain a chemical practicum KIT as an effective learning medium to train students' science process skills in scientific method, polar and non-polar covalent compounds, electrolyte and non-electrolyte solutions. This study uses a 4-D research model which includes the stages of defining, designing, developing, and distributing. However, in this study only limited to the development stage. The results of the research obtained showed that classical completeness in the posttest workmanship on all three materials was 100%. While the increase in learning outcomes aspects of science process knowledge and skills in the three materials are in the category of "medium" and "high". Based on the results, it can be concluded that the practicum KIT learning media is effective for training science process skills in scientific method, polar and non-polar covalent compounds, electrolyte and non-electrolyte solutions.
Pengembangan Lembar Kegiatan Peserta Didik (LKPD) Berbasis Soft Skills Pada Materi Pokok Koloid Kelas XI SMA
Authors: Ruku Ellen Cristy , Rusmini Rusmini
Published: September 2019

The purpose of the research is determine the feasibility of the student worksheet based on soft skills on the subject matter of colloids in terms of content validity and construct through the results of expert validation, practicality through student activities and student responses and effectiveness through student learning outcomes and the assessment of students' soft skills. This type of research is a 4-P model development research with stages, namely, defining, designing, developing, and dessiminate, which is limited to the development stage. A limited trial was conducted to 15 students of 11th grade in SMA Negeri 1 Bangsal Mojokerto. The results showed that the worksheet developed valid in terms of content validity obtained a percentage of 91.76% and construct validity obtained a percentage of 92.49%. Practical in terms of the results of student responses to the worksheet obtained a percentage of 97.16% and supported by observations of activities students get a percentage of 92.27%. Effectiveness in terms of student learning outcomes obtained a value of ≥ 70 with classical completeness of 100% and the assessment of soft skills of students gained a percentage of 92.41% so that students have the ability to entrepreneurship.
Avaliação da Educação Superior: o Exame Nacional de Cursos (Provão) e os rankings acadêmicos e índices no contexto da avaliação para a regulação
Authors: Ferreira Tânia-Aparecida , Calderón Adolfo-Ignacio
Published: September 2019

O presente artigo, de cunho teórico, fundamentado em uma criteriosa revisão da literatura, se insere nos estudos sobre os rankings acadêmicos e as tabelas classificatórias como instrumentos de avaliação externa. Objetiva estudar as tendências das políticas de educação superior no Brasil, tomando como referência o pioneirismo do Exame Nacional de Cursos (1996-2002), no âmbito das políticas de avaliação em larga escala, cujos princípios estruturantes ainda ganham centralidade, vinte e cinco anos após sua criação, no processo de avaliação das Instituições de Educação Superior. Defende-se a hipótese de que, apesar das tentativas de neutralização dos rankings como indutores de qualidade, a partir dos defensores do Sistema Nacional de Avaliação da Educação Superior, o tempo demonstrou a prevalência dos princípios da Administração Pública Gerencial, bem como a força do ranqueamento na educação superior, no contexto da avaliação para a regulação, como instrumento de transparência de informações, prestação de contas e controle social, em cenários de mercado ou quase-mercado educacional.
Avances, retrocesos y conflictividad en las universidades argentinas: 1960-1970
Authors: Flachs María Cristina Vera de
Published: September 2019

El presente artículo intenta contribuir a un mayor conocimiento de la situación de las universidades argentinas en la década del sesenta del siglo XX y mostrar el proceso de radicalización política que ellas experimentaron como así también el movimiento estudiantil de los años 1966-1970, haciendo hincapié en lo sucedido en Córdoba. Mucho se ha escrito sobre este periodo principalmente en lo referido al ascenso de las luchas obreras y la radicalización ideológica política que repercutirá en la década siguiente y también sobre educación superior. Los estudios han ido ganando solidez en estos últimos años sin embargo hay todavía muchos vacíos, lo que nos impulsa a escribir estas páginas.
Educação superior no Brasil: direito do cidadão ou serviço-mercadoria?
Authors: Santos Eduardo , Vitagliano José Arnaldo
Published: September 2019

O artigo se concentra na análise da regulamentação jurídico-legal que, viabilizando a configuração mercantil majoritariamente assumida pelo sistema de educação superior brasileiro, resultou na ampliação do campo das instituições privadas de ensino e possibilitou a participação de grupos estrangeiros de mercado no setor, num movimento que envolve aquisições, fusões e lançamento de ações na bolsa de valores e é capitaneado por corporações empresariais. Busca-se compreender as formas jurídico-legais que promoveram a adequação da legislação para atender demandas político-ideológicas de legitimação do capital no setor e, em decorrência, reafirmaram a condição da formação superior como serviço-mercadoria. Para atingir tal objetivo geral, I) analisamos a agenda político-ideológica da regulação transnacional que incidiu nas políticas nacionais para a educação superior forjando estratégias de expansão baseadas na privatização mercantil; e II) analisamos a evolução da legislação educacional, constitucional e infraconstitucional, que culminou com a configuração de um mercado de educação superior e legalizou a participação de investimentos de grupos nacionais e estrangeiros no setor. Os dados em análise advêm de fontes bibliográficas sobre regulação transnacional e privatização mercantil e de fontes documentais como a Constituição Federal de 1988 (CF), a Lei de Diretrizes e Bases da Educação de 1996 (LDB) e a legislação infraconstitucional que regulamenta a educação superior no país, percorrendo os anos de 1988 a 2017. O artigo avança na formulação da tese da duvidosa constitucionalidade desse processo, uma vez que o tipo de reconfiguração alcançado se contrapõe a dispositivos da CF e da LDB, documentos que definem a educação como direito fundamental do cidadão, e não um serviço-mercadoria. Privatização mercantil, regulação transnacional, serviço-mercadoria e regulamentação jurídico-legal constituem as categorias centrais deste trabalho.