170,360 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
SP-A2 mutations impair dimmer/timer which contributes to protein secretion deficiency.
No full text<p>(<b>A</b>) CHO-K1 Cells were transiently expressed vector (pcDNA3.0), SP-A2 wild-type, G231V, F198S, Q223K plasmids, 48 h after transfection the cells were harvested and the protein was analysed by SDS-PAGE and western blotting under nonreduced condition without β-mercaptoethanol. (<b>B,C</b>) Transiently expression of SP-A2 d(100–133), a neck region deletion mutation, in CHO-K1 for 48 h, the cells were lysated and separated by SDS-PAGE and western blotting under nonreduced condition (<b>B</b>) or reduced condition (<b>C</b>, upper panel). SP-A2 d (100–133) mutation can block dimmer/trimer formation (<b>B</b>) and protein secretion (<b>C,</b> middle panel). Monomer, dimmer, and trimer complexes are indicated.</p
RANCANG BANGUN SISTEM KONTROL SUHU MENGGUNAKAN DIMMER DAN MONITORING DENGAN HUMAN MACHINE INTERFACE (HMI) PADA ALAT PENETAS TELUR OTOMATIS BERBASIS PLC SCHNEIDER
No full textABSTRAK
Pada umumnya masyarakat dipedesaan menetaskan telurnya dengan ala
kadarnya, yaitu dengan menetaskan telur dengan dierami indukannya secara
langsung, sehingga perkembangbiakannya kurang maksimal. Sistem peneta san
telur secara tradisional dengan menggunakan idukan alami ini dirasa kurang
efektif. Cara ini tidak bisa diandalkan jika dijadikan sebagai sumber penghasilan.
Dengan demikian dapat diciptakan sesuatu alat yang dapat menetaskan telur
secara otomatis, dimana alat tersebut dapat mengontrol tinggi rendahnya suhu
sesuai dengan setting point yang telah ditentukan. Oleh sebab itu, kecanggihan
teknologi dalam dunia perindustrian dimasa sekarang ini, banyak HMI (Human
Machine Interface) seperti Movicon 11.5 dengan sistem tersebut dapat digunakan
untuk memonitoring kondisi suhu dan hal lainnya. Kebanyakan HMI biasanya
dalam penggunaannya diperlukan juga PLC ( Programmable Logic Controller)
sebagai otak untuk pengontrolannya, PLC yang digunakan kali ini yaitu PLC
Schneider Modicon M221CE16R. Dengan kedua piranti tersebut dapat
mengembangkan suatu alat penetas telur secara otomatis yang dapat mengontrol
suhu yang diperlukan untuk menetaskan telur sesuai dengan suhu yang pada
indukan ayam. Dan hasil dari alat tersebut dapat dikatakan akurasi karena suhu
yang dihasilkan untuk keperluan penetasan telur adalah 37°C sampai 39°C, dan
apabila suhu diatas 39°C maka lampu akan meredup, begitu juga ketika suhu
dibawah 37°C maka lampu akan menyala secara maksimal. Dan dari uji coba
dimmer yang telah dilakukan yaitu ketika suhu dibawah 37°C tegangan yang
dikeluarkan dimmer 220V AC, untuk suhu 37°C - 39°C tegangan yang
dikeluarkan dimmer 165V AC, dan untuk suhu 40°C maka tegangan yang
dikeluarkan dimmer sebesar 115V AC. Dan dari uji coba yang telah dilakukan
didapatkan hasil penetasan yang berhasil sebesar 86,67% dan yang gagal menetas
sebesar 13,33%. Dengan alat penetas telur otomatis ini masyarakat atau industri
tidak perlu susah payah untuk menetaskan telur nantinya .
Kata kunci: penetas telur otomatis, programmable logic controller (PLC),
movicon 11.5, dimmer.
ABSTRACT
In general, the rural communities hatch their livestock eggs with perfection, which
is by hatching the eggs directly by the broodstock so that the breeding is not
optimal. The traditional egg hatching system using natural broodstock is
considered less effective. This method cannot be relied upon if it is used as a
source of income. Thus, a device can be created that can hatch e ggs automatically,
in which the device can control the high and low temp erature according to the set
point. Therefore, technological sophistication in the industrial world today such as
HMI (Human Machine Interfaces) like Movicon 11.5 can be used to monitor
temperature conditions and other things. Most HMIs usually use PLC
(Programmable Logic Controller) as the brain for its control. PLC used in this
research is PLC Schneider Modicon M221CE16R. Both devices can develop an
egg incubator automatically which can control the needed temperature to incubate
the eggs according to the temperature of the broodstock. The result of using the
device is accurate because the temperature produced for hatching eggs is 37 ° C to
39 ° C and if the temperature is above 39 ° C, the lights will fade, as well as when
the temperature is below 37 ° C, the lights will turn on to the maximum. And from
the dimmer trials that have been carried out namely the temperature compilation
below 37 ° C the voltage released dimmer 220V AC, for a temperature of 37 ° C -39 ° C the voltage that receives a dimmer 165V AC, and for a temperature of 40 °
C then the voltage that is received by the dimmer is 115V AC. From the trials that
have been carried out, the results of successful hatching are 86.67%, and those
that are failed to hatch are 13.33%. With this automatic egg incubator, people or
industries do not need to bother to hatch eggs later.
Keywords: automatic egg incubator, programmable logic controller (PLC),
movicon 11.5, dimmer
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Proximity Led Light Dimmer and Alarm
No full textThis project required the usage of an Arduino UNO and an ultrasonic sensor to complete a task. To follow this requirement a proximity LED dimmer and alarm were designed using a c++ code and circuit building techniques. This device works by sending out a high frequency sound and recording the time it took to return to the ultrasonic sensor. This time is used to find how far away an object is from the ultrasonic sensor, using the calculated distance the device decides what it will output. If the object is greater than 10 cm away the alarm does not sound and the lights brightness is scaled, the alarm will go off and the light will turn off if the object is within 10 cm of the sensor
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Ein monolithischer PWM-Dimmer für Automobilanwendungen in SIMOX-Technologie
No full textS.393-398In diesem Beitrag wurde ein monolithischer PWM-Dimmer für Automobilanwendungen vorgestellt. Aufgrund der dielektrischen Isolation durch SIMOX besitzt die integrierte Leistungsschaltung eine hohe Störsicherheit in Verbindung mit einem geringen Flächenbedarf durch die Verwendung von SOI-Signaltransistoren und einem vertikalen DMOS-Leistungstransistors. Das IC ist vollständig gegen Kurzschluß und thermische Überlastung geschützt. Schutz vor Überspannungen sowie bei Verpolung wird durch den Einsatz eines zweiten DMOS-Transistors erreicht, der als Klemmtransistor zwischen der Batteriespannung und Chip-Masse arbeitet. Weiterhin umfaßt der Schaltkreis eine Begrenzung des Effektivwertes der Ausgangsspannung sowie deren Anstiegsrate, um eine erhöhte elektromagnetische Verträglichkeit zu erreichen
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
A 0.12mm<sup>2</sup> Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C
No full text Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm 2 ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm 2 resistor-based sensor that uses a Wien-bridge (WB) filter to achieve 0.1 {circ} {C} (3 sigma) inaccuracy from - 40 {circ} {C} to 180 {circ} {C}. Compared to a state-of-the-art WB sensor [4], it occupies 6 × less area and achieves comparable relative accuracy over a 76% wider operating range. Session 10.3 Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
A ±25A Versatile Shunt-Based Current Sensor with 10kHz Bandwidth and ±0.25% Gain Error from -40°C to 85°C Using 2-Current Calibration
No full textAccurate current sensing is critical in many industrial applications, such as battery management and motor control. Precise shunt-based current sensors have been reported with gain errors of less than 1% over the industrial temperature range (-40°C to 85°C) [1]–[4]. However, since they are intended for coulomb counting, their bandwidth is limited to a few tens of Hz, making them unsuitable for battery impedance or motor-current sensing. This paper presents a current sensor with a wide (10kHz) bandwidth and a tunable temperature compensation scheme (TCS), which allows it to be flexibly used with different types of shunts while maintaining high accuracy. A low-cost room-temperature calibration scheme is proposed to optimize gain flatness over temperature by exploiting the shunt's self-heating at large currents. Over the industrial temperature range and a ±25A current range, it achieves state-of-the-art gain error (±0.25%) with both low-cost PCB and stable metal-alloy shunts.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
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