1,721,387 research outputs found
Attosecond electronic timing with rising edges of photocurrent pulses
No full textFor edge-sensitive timing applications, the edge jitter of electrical pulses is important. Here, the authors report on very low rising edge jitter extracted from an optical frequency comb and explore the best condition for low jitter by minimizing the amplitude-to-timing conversion in photodiodes
Femtosecond-precision electronic clock distribution in CMOS chips by injecting frequency comb-extracted photocurrent pulses
No full textA clock distribution network (CDN) is a ubiquitous element that provides synchronized clocks to all circuit blocks in the chip. Here the authors demonstrate femtosecond-precision distribution of clocks in CMOS chips using optical frequency combs and driverless CDNs. A clock distribution network (CDN) is a ubiquitous on-chip element that provides synchronized clock signals to all different circuit blocks in the chip. To maximize the chip performance, today's CDN demands lower jitter, skew, and heat dissipation. Conventionally, on-chip clock signals have been distributed in the electric voltage domain, resulting in increased jitter, skew, and heat dissipation due to clock drivers. While low-jitter optical pulses have been locally injected in the chip, research on effective distribution of such high-quality clock signals has been relatively sparse. Here, we demonstrate femtosecond-precision distribution of electronic clocks using driver-less CDNs injected by photocurrent pulses extracted from an optical frequency comb source. Femtosecond-level on-chip jitter and skew can be achieved for gigahertz-rate clocking of CMOS chips by combining ultralow comb-jitter, multiple driver-less metal-meshes, and active skew control. This work shows the potential of optical frequency combs for distributing high-quality clock signals inside high-performance integrated circuits, including 3D integrated circuits.
Me-tsits u-melits.
No full textResponsum to justify Rabbi Nehemyah Hayun in a cotroversy concerning the correct chanting of the Blessing of the Priests.Likute ShoshanimBSLW YIVOL Clean-up ProjectDigital imag
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
From Meaning-making to Meaning-sharing: Participatory Interpretation in a 3D Virtual Heritage Site
No full textRecent advances in digital heritage have led to participatory interpretation that enables the creation of content provided by individuals as well as content from official cultural institutions. Although researchers have developed systems supporting participatory interpretation, little is known about how people experience participatory interpretation that is socially generated. To investigate this, we developed a mobile Virtual Reality application called MyInterpret and conducted a user study with 17 participants. The study results showed that user-generated interpretation significantly improving user experience, participants created and perceived user-generated interpretation differently from the official interpretation, and social features were used for engaging with user-generated content. We outline the implications of our work for curators and designers, and discuss how they may benefit from considering `participatory interpretation' in the future
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
펄스 레이저를 이용한 초저잡음 디지털 클럭 신호 생성 방법
No full textA low-jitter digital clock signal generating system which uses optical pulses output from a pulse laser includes a first balanced photodetector that converts first and second optical pulses with a delayed time interval into first and second electrical pulses through first and second photodiodes and outputs first and second modulated pulses generated by allowing the first and second electrical pulses to partially overlap each other, a second balanced photodetector that converts third and fourth optical pulses with the delayed time interval into third and fourth electrical pulses through third and fourth photodiodes, and outputs a second modulated pulse generated by allowing the third and fourth electrical pulses to partially overlap each other, and a capacitor. The capacitor is charged by the first modulated pulse, is discharged by the second modulated pulse, and outputs a voltage according to the charging and discharging as a clock signal
H ANALISIS CAMPUR KODE PENGGUNAAN BAHASA DALAM PEMBELAJARAN DI PONDOK PESANTREN MODERN DARUSSALAM KEPAHIANG: Hayun Istikomah,Ngudining Rahayu,Suryadi
No full textPenelitian ini bertujuan untuk mendeskripsikan bentuk campur kode dan faktor penyebab terjadinya campur kode dalam pembelajaran di kelas X MA PPMD Kepahiang. Penelitian ini menggunakan metode deskriptif. Sumber data pada penelitian ini yaitu tuturan guru dan siswa. Data pada penelitian ini yaitu tuturan guru dan siswa yang mengandung campur kode dalam pembelajaran di kelas X MA PPMD Kepahiang. Teknik pengumpulan data pada penelitian ini menggunakan teknik rekam, simak, dan wawancara. Langkah-langkah analisis data dalam penelitian ini (1) transkripsi data (2) identifikasi data (3) klasifikasi data (4) interpretasi data (5) penyimpulan data. Hasil penelitian ini menunjukkan bahwa terdapat campur kode dan faktor penyebabnya pada penggunaan bahasa dalam pembelajaran yang berbentuk kata 10, frasa 3, klausa 2, pengulangan kata 2, baster 1. Bentuk tersebut terdiri atas beberapa kelas kata yaitu nomina, verba, non verba, adjektiva, pronomina, numeralia, adverbia, interogativa, preposisi, konjungsi, fatis, pengulangan seluruh dan perubahan fonem. Adapun faktor yang mempengaruhinya yaitu (1) faktor penutur (2) faktor kebahasaan terdapat 4 faktor yang mempengaruhinya yaitu keterbatasan penggunaan kode, penggunaan istilah yang lebih populer, pembicara dan pribadi pembicara, membangkitkan rasa humor. Faktor inilah yang dapat menghalangi guru untuk mentransfer ilmunya dengan baik sehingga penyampaian yang disampaikan guru tidak utuh dan akan mempengaruhi profesionalisme guru.Penelitian ini bertujuan untuk mendeskripsikan bentuk campur kode dan faktor penyebab terjadinya campur kode dalam pembelajaran di kelas X MA PPMD Kepahiang. Penelitian ini menggunakan metode deskriptif. Sumber data pada penelitian ini yaitu tuturan guru dan siswa. Data pada penelitian ini yaitu tuturan guru dan siswa yang mengandung campur kode dalam pembelajaran di kelas X MA PPMD Kepahiang. Teknik pengumpulan data pada penelitian ini menggunakan teknik rekam, simak, dan wawancara. Langkah-langkah analisis data dalam penelitian ini (1) transkripsi data (2) identifikasi data (3) klasifikasi data (4) interpretasi data (5) penyimpulan data. Hasil penelitian ini menunjukkan bahwa terdapat campur kode dan faktor penyebabnya pada penggunaan bahasa dalam pembelajaran yang berbentuk kata 10, frasa 3, klausa 2, pengulangan kata 2, baster 1. Bentuk tersebut terdiri atas beberapa kelas kata yaitu nomina, verba, non verba, adjektiva, pronomina, numeralia, adverbia, interogativa, preposisi, konjungsi, fatis, pengulangan seluruh dan perubahan fonem. Adapun faktor yang mempengaruhinya yaitu (1) faktor penutur (2) faktor kebahasaan terdapat 4 faktor yang mempengaruhinya yaitu keterbatasan penggunaan kode, penggunaan istilah yang lebih populer, pembicara dan pribadi pembicara, membangkitkan rasa humor. Faktor inilah yang dapat menghalangi guru untuk mentransfer ilmunya dengan baik sehingga penyampaian yang disampaikan guru tidak utuh dan akan mempengaruhi profesionalisme gur
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