19 research outputs found
Adiabatic quantum pumping through surface states in 3D topological insulators
No full textWe investigate adiabatic quantum pumping of ballistic Dirac fermions on the surface of a strong three-dimensional topological insulator. Two different geometries are studied in detail, a normal metal–ferromagnetic–normal metal (NFN) junction and a ferromagnetic–normal metal–ferromagnetic (FNF) junction. Using a scattering matrix approach, we show that each time a new resonant mode appears in the transport window the pumped current exhibits a maximum and provide a detailed analysis of the position of these maxima. We also predict a characteristic difference between the pumped current in NFN- and FNF-junctions: whereas the former vanishes for carriers at normal incidence, the latter is finite due to the different nature of wavefunction interference in the junctions. Finally, we predict an experimentally distinguishable difference between the pumped current and the conductance.Quantum NanoscienceApplied Science
Pengaruh Cara dan Waktu Penyulingan Terhadap Rendemen dan Mutu Minyak Nilam (Pogostemon cablim Benth)
No full textDalam upaya meningkatkan rendemen dan mutu minyak nilam, telah dilakukan penelitian penyulingan minyak nilam dengan menggunakan cara uap dan air serta cara uap langsung, dengan kombinasi beberapa waktu penyulingan (3,4 dan 5 jam). Rancangan yang digunakan adalah Rancangan Acak Lengkap dengan percobaan factorial dan ulangan empat kali. Hasil penelitian menunjukkan bahwa cara penyulingan mempengaruhi rendemen dan kadar patchouli alcohol, sedangkan waktu penyulingan mempengaruhi rendemen, bobot jenis, bilangan ester dan kadar patchouli alcohol. Makin lama waktu penyullingan semakin tinggi rendemen, bobot jenis, bilangan ester dan kadar patchouli alcohol yang lebih tinggi dibandingkan dengan cara uap dan air. Sebagian besar minyak nilam yang dihasilkan dengan kedua cara penyulingan tersebut memenuhi syarat mutu yang ditentukan dalam SP (Standard Perdagangan), SII (Standar Industri Indonesia), dan EOA (Essential Oil Association)
TINJAUAN KRITIS TERHADAP KONSEP IDEOLOGIS KEPENGARANGAN INDONESIA : KAJIAN SOSIOLOGIS
Get PDFIndonesian writers continue to race across the ocean of globalization and technology. Those who come from various regions, fused into a large community as citizens of the world literature, sow among a number of mirage and cyberspace. An Indonesia poet or author has diverse languages, in accordance with the ideological background (worldview) authorship respectively. Ideology means a way of thinking or way of life of a person or a group. This paper assesses the ideology of Indonesia authorship in terms of sosilogi. Sociology is the study of society or community. Through this sociological theory discovered the concept of Indonesian author diverse ideologies. Indonesian author is able to create an ideology novelty literary language in conditions of globalization regime. Through literature, the authors of Indonesia express ideas and thoughts for the people of Indonesia
Alternatif Konsep Kelembagaan untuk Penajaman Operasionalisasi dalam Penelitian Sosiologi
Get PDFEnglishThe experts have no the same perception regarding the term of “institution”. This leads to unworkable definitions and concepts. This paper reviews the existing thoughts, especially those related with the term of “organization”, and simplifies them to formulate an easier concept which enables scientists and practitioners to work with. Different meanings exist due to different points of views of the experts, especially in early stage of sociology development. Sine 1950’s, social institution and social organization have been distinguished strictly. The author proposes a solution, i.e., the term of “institution” to mention the social system in which it is classified into two important components, namely “institutional aspect” and “organizational aspect”. Through this differentiation, it is expected that the analysis becomes more detailed, signifies the strong and weak aspects, and enables to choose the strategy of developing it.IndonesianIstilah “kelembagaan” belum memperoleh kesamaan pengertian di kalangan para ahli. Hal ini menyebabkan munculnya beberapa pengertian dan konsep yang menyebabkan tidak dapat dioperasionalkan. Tulisan ini berusaha melakukan tinjauan (review) seluruh pemikiran yang berkembang, terutama kaitannya dengan istilah “organisasi”, untuk kemudian merumuskan satu konsep yang lebih mudah sehingga dapat dipergunakan baik untuk kalangan ilmuwan maupun praktisi. Ketidaksamaan pemaknaan terjadi karena setiap ahli memiliki titik pandang yang berbeda dalam membahasnya, terutama pda masa-masa awal perkembangan sosiologi. Namun, semenjak era 1950-an, sesungguhnya sudah terlihat adanya pembedaan yang tegas antara kelembagaan (social institution) dan organisasi (social organization). Sebagai solusinya, penulis menggunakan istilah “kelembagaan” untuk menyebut suatu sistem sosial dimaksud, yang didalamnya dapat dibagi menjadi dua komponen penting, yaitu “aspek kelembagaan” dan “aspek keorganisasian”. Dengan membedakan seperti ini, maka analisa dapat lebih mendalam, dapat diketahui aspek apa yang kuat dan lemah, serta dapat memilih strategi untuk pengembangannya
TANTANGAN PENGINTEGRASIAN JAMINAN KESEHATAN DAERAH KE DALAM JAMINAN KESEHATAN NASIONAL UNTUK MEWUJUDKAN CAKUPAN PELAYANAN KESEHATAN UNIVERSAL
Get PDFThis study is to review the facts in the health care field, where WHO has agreed to achieve Universal Health Coverage (UHC) in 2014. UHC is a health system that ensures every citizen in the population has fair access to a qualified promotive, preventive, curative, and rehabilitative health care at reasonable costs. Universal coverage contains two core elements namely equitable access to qualified health services for every citizen, and the protection of financial risks when people use health services. Indonesia is currently in transition towards UHC. Law No. 40 Year 2004 about National Social Security System (UU SJSN)' has answered the basic principles of UHC by requiring every citizen to have access to comprehensive health services that are needed through pre-effort system. Then, the author will formulate solutions to these problems which can be seen as a recommendation for the implementation of health care development. Problem solving methods used in formulating solutions to problems are policy analysis using William Dunn and Abidin's theory, and the Fishbone Diagram. Based on the analysis, the author advises the need to arrange a formulation that meets the demands of integration of Jamkesda into JKN. Formulation of policies which have been directed towards the centralization of health financing through JKN program must be balanced by providing a flexible space for local governments to participate in decision making processes dynamically. This formulation is called Centralized Dynamic Integration policy formulation.Â
Peningkatan Hasil Belajar Siswa Kelas VII Smplb Karya Mulia Surabaya Menulis Buku Harian melalui Pemetaan Pikiran dengan Baling-Baling Berwarna
Get PDFWriting a diary with colorful propeller mind mapping method is an innovative method to enhance the 7th grade hearing impaired students' capabilities and skills of writing in Karya Mulia Special Secondary School for Students with Disabilities (SMPLB) Surabaya. This innovative effort was based on the constraints or obstacles to teach hearing impaired students in developing the abilities and skills of writing a diary that were still far below the average of minimum completion criteria (KKM). To find out the extent of this innovative method's implementation's impact, the author wanted to do a class action research (PTK) that includes 3 cycles where two-time meetings were conducted in each cycle. The research was started from the pre action activities continued to a cycle-1, cycle-2, to cycle-3. The result indicates that there has been improvements in 7th grade student's learning outcome in writing a diary through mind mapping mehod using learn to write diary through colorful propeller mapping method AsbtrakMenulis buku harian melalui metode pemetaan pikiran (mind mapping) dengan menggunakan Baling-Baling berwarna merupakan metode inovatif untuk meningkatkan kemampuan dan keterampilan menulis buku harian siswa tuna rungu kelas VII SMPLB Karya Mulia Surabaya. Upaya inovatif ini beranjak dari kendala/hambatan sebelumnya dalam membelajarkan siswa tuna rungu mengembangkan kemampuan dan keterampilan menulis Buku Harian yang hasilnya berada jauh di bawah rata-rata Kriteria Ketuntasan Minimum (KKM). Untuk mengetahui sejauh mana dampak dari penerapan metode inovatif ini, penulis melakukan penelitian tindakan kelas (PTK) yang mencakup 3 siklus dan setiap siklus terdiri dari dua kali pertemuan. Penelitian dimulai dari kegiatan pra tindakan, dilanjutkan dengan siklus-1, siklus-2, sampai dengan siklus-3. Hasil penelitian tindakan kelas menunjukkan adanya peningkatan hasil belajar siswa kelas VII SMPLB Karya Mulia Surabaya dalam menulis buku harian melalui metode pemetaan pikiran dengan Baling-Baling berwarn
MEDIA PEMBELAJARAN MENULIS PUISI BERBASIS APLIKASI ANDROID UNTUK SISWA SMA
Get PDFPoetry writing activities are still considered difficult by students. The learning media used have not been able to support learning activities on poetry material. Therefore, this study aims to produce Android-based learning media on poetry material for high school subjects. This research method adapts the ADDIE model to design a system in learning. The instruments in this study used media validation sheets and material validation sheets. The results of this study indicate that the learning media based on an Android applications is declared appropriate for use in learning. The feasibility is evidenced by the result of the assessment of media experts and material experts who state that the learning media is very accomodating and qualified. Based on these result, instructional media for writing poetry is recommended to be develop in other materials in bahasa Indonesia. AbstrakKegiatan menulis puisi masih dianggap sulit oleh siswa. Media pembelajaran yang digunakan selama ini belum mampu menunjang kegiatan pembelajaran pada materi puisi. Oleh karena itu, tujuan penelitian ini adalah untuk menghasilkan sebuah media pembelajaran berbasis aplikasi android pada materi puisi untuk siswa kelas X SMA. Metode penelitian ini mengadaptasi model ADDIE untuk merancang sebuah sistem dalam pembelajaran. Instrumen dalam penelitian ini menggunakan lembar validasi media dan lembar validasi materi. Hasil penelitian ini menunjukkan bahwa media pembelajaran menulis puisi berbasis aplikasi android dinyatakan layak digunakan dalam pembelajaran. Kelayakan tersebut dibuktikan dari hasil penilaian pakar media dan pakar materi yang menyatakan bahwa media pembelajaran sangat akomodatif dan berkualitas. Berdasarkan hasil tersebut, media pembelajaran menulis puisi berbasis aplikasi direkomendasikan untuk dikembangkan pada materi lainnya dalam mata pelajaran bahasa Indonesia.
Morita Isomorphism for Cuntz Algebras
No full textLet Rep On denote the category of all nondegenerate ∗ representations of the Cuntz algebra On. For any 2 ≤ n, m< ∞, we construct an isomorphism functor Fn, m from Rep Om to Rep On such that (i) Fn, m commutes with infinite direct sum, (ii) Fn, m ∘ Fm, l = Fn, l and Fm,n=Fn,m−1 for any 2 ≤ n, m, < ∞, (iii) for the von Neumann algebra Nπ generated by the image of a representation π, HCode NFn,m(π) and Nπ are isomorphic for any π in Rep On, and (iv) there exists a functor F∞,n from Rep On to Rep O∞ with a right inverse such that F∞,n∘ Fn,m= F∞,m for any 2 ≤ n, m< ∞. © 2022, The Author(s), under exclusive licence to Springer Nature B.V.journal articl
THE EFFECTIVENESS OF ICT UTILIZATION ON COGNITIVE ACHIEVEMENT IN THE VOCATIONAL EDUCATION DURING THE COVID-19 OUTBREAK IN INDONESIA
Get PDFIn the current Covid-19 transition period, it is very necessary to use innovative vocational learning models in digital models. The number of vocational learning models using ICT as the main tool during the pandemic needs to be studied further on how the model is implemented and its effectiveness. The problem that arises is that we do not know whether the use of ICT tools in vocational learning is effectively used. This study aims to empirically verify the effectiveness of ICT in vocational education learning during the Covid-19 transition period. Meta-Analysis is used as a method to conduct this research. There are 30 latest articles reviewed during the year of 2020 to 2021. All articles are classified based on the author, year of publication, the ICT device or application used, and the results of the post-test experimental and control classes. The results are obtained after the calculation using the effect size (ES) formula. The calculation results show that the learning using ICT as a tool during the Covid-19 pandemic has a high effect (1.28) on cognitive achievement in vocational education. The conclusion of this study is that ICT-assisted learning has a high level of effectiveness and is suitable for learning in the vocational field. Then, the dominant multimedia device or application used in the vocational learning in Indonesia is the computer technology network and it is the most widely used for the application of ICT in learning
Certainty-Equivalence-Based Sensorless Robust Sliding Mode Control for Maximum Power Extraction of an Uncertain Photovoltaic System
No full textPhotovoltaic (PV) arrays and their electronic converters are subject to various environmental disturbances and component-related faults that affect their normal operations and result in a considerable energy loss. Therefore, it is ever demanding to design such closed-loop operating algorithms that tolerate faults, present acceptable performance, and avoid wear and tear in the systems. In this work, the core objective is to extract maximum power from a PV array subject to environmental disturbances and plant uncertainties. The system is considered under input channel uncertainties (i.e., faults) along with variable resistive load and charging stations. A neuro-fuzzy network (NFN)-based reference voltage is generated to extract maximum power while considering variable temperature and irradiance as inputs. Furthermore, the estimated reference is tracked by the actual PV voltage under two types of controllers: certainty-equivalence-based robust sliding mode (CERSMC) and certainty-equivalence-based robust integral sliding mode (CERISMC). These strategies benefit from improving the robustness against faults (disturbances). The proposed methods use the inductor current, which is recovered via the velocity observer and the flatness property of nonlinear systems. The system’s stability is proven in the form of very appealing theorems. These claims are validated by the simulation results, which are carried out in a MATLAB environment
