On-line image readout in CTEM

1994 ◽  
Vol 52 ◽  
pp. 400-401
Author(s):  
K.-H. Herrmann ◽  
W. D. Rau ◽  
R. Sikeler
Keyword(s):  
Primary Electron ◽  
Digital Information ◽  
Electron Hole ◽  
Detection Technology ◽  
Long Time ◽  
On Line ◽  
Electron Image ◽  
Optical Transfer ◽  
Detection Quantum Efficiency ◽  
Technical Solutions

Quantitative recording of electron patterns and their rapid conversion into digital information is an outstanding goal which the photoplate fails to solve satisfactorily. For a long time, LLL-TV cameras have been used for EM adjustment but due to their inferior pixel number they were never a real alternative to the photoplate. This situation has changed with the availability of scientific grade slow-scan charged coupled devices (CCD) with pixel numbers exceeding 106, photometric accuracy and, by Peltier cooling, both excellent storage and noise figures previously inaccessible in image detection technology. Again the electron image is converted into a photon image fed to the CCD by some light optical transfer link. Subsequently, some technical solutions are discussed using the detection quantum efficiency (DQE), resolution, pixel number and exposure range as figures of merit.A key quantity is the number of electron-hole pairs released in the CCD sensor by a single primary electron (PE) which can be estimated from the energy deposit ΔE in the scintillator,

The DQE of an electron image recording system

1978 ◽  
Vol 36 (1) ◽  
pp. 100-101
Author(s):  
K.-H. Herrmann ◽  
D. Krahl ◽  
H.-P Rust
Keyword(s):  
Primary Electron ◽  
Ideal Case ◽  
Image Recording ◽  
Main Requirement ◽  
High Detection ◽  
Electron Image ◽  
Video Amplifier ◽  
Detection Quantum Efficiency ◽  
Selection Of ◽  
The Ideal

The high detection quantum efficiency (DQE) is the main requirement for an imagerecording system used in electron microscopy of radiation-sensitive specimens. An electronic TV system of the type shown in Fig. 1 fulfills these conditions and can be used for either analog or digital image storage and processing [1], Several sources of noise may reduce the DQE, and therefore a careful selection of various elements is imperative.The noise of target and of video amplifier can be neglected when the converter stages produce sufficient target electrons per incident primary electron. The required gain depends on the type of the tube and also on the type of the signal processing chosen. For EBS tubes, for example, it exceeds 10. The ideal case, in which all impinging electrons create uniform charge peaks at the target, is not obtainable for several reasons, and these will be discussed as they relate to a system with a scintillator, fiber-optic and photo-cathode combination as the first stage.

scholarly journals Skaitmeninės informacijos išsaugojimas: specialistų kvalifikacijos tobulinimas. Projekto Digital Preservation Europe atvejis

2008 ◽  
Vol 44 ◽  
pp. 78-87
Author(s):  
Jūratė Kuprienė ◽  
Marija Prokopčik
Keyword(s):  
Vocational Training ◽  
Digital Preservation ◽  
Training Programme ◽  
Digital Information ◽  
Training Techniques ◽  
Training Materials ◽  
Long Time ◽  
Training Event ◽  
On Line ◽  
Training Courses

Bibliotekų, archyvų ir muziejų darbuotojai susiduria su nauju iššūkiu – reikia išsaugoti skaitmeninę informaciją. Nors šia tema rašoma ir diskutuojama jau labai seniai, priimti sprendimus ir pradėti vykdyti skaitmeninės informacijos išsaugojimo programas (toliau – SIIP) vis dar pernelyg sudėtinga. Kultūros paveldo institucijų atstovai pripažįsta, kad ilgalaikio išsaugojimo problema tampa vis aktualesnė. Vis dažniau tenka priimti strateginius sprendimus ir atsakyti į praktinius klausimus, susijusius su konkrečių metodų ar technologijų pasirinkimu. Norint tokius uždavinius įgyvendinti reikia tinkamos profesinės kvalifikacijos, todėl būtina atkreipti dėmesį į specialistų rengimą bei kvalifikacijos tobulinimą šioje srityje. Skaitmeninės informacijos išsaugojimo (toliau – SII) veiklą Europoje koordinuojančio projekto DigitalPreservationEurope dalyviai, atlikę ankstesnių mokymų šioje srityje ir mokymams tinkamos medžiagos analizę bei projekto partnerių – archyvų, bibliotekų ir universitetų, dirbančių skaitmeninės informacijos išsaugojimo srityje atstovų – apklausą, parengė mokymų programą ir organizuoja skaitmeninės informacijos išsaugojimo specialistų mokymo kursus. Šiame straipsnyje aptariami šio projekto rezultatai ir nagrinėjamas skaitmeninės informacijos išsaugojimo mokymų poreikis, mokymo programos sudarymo tikslai ir principai. Pristatoma vykdant šį projektą parengta skaitmeninės informacijos išsaugojimo mokymų programa, apžvelgiami pirmųjų šio projekto organizuotų mokymų rezultatai.Digital preservation: vocational training. The case of Digital Preservation EuropeJūratė Kuprienė, Marija Prokopčik SummaryProfessionals representing library, archyves and museums community are now dealing with a new challenge – preservation of digital information. Even though this topic is being described and discussed for quite a long time, it is still difficult to take decisions and start implementation programmes on digital preservation. Representatives of cultural heritage institutions admit that the issue of longterm digital preservation becomes topical. More and more often these professions have to take strategical decisions and answer practical questions on the choise of specific methods or technologies. Implementation of such tasks requires special professional skills. That is why it is necessary to pay attention to education and vocational training in the field of digital preservation. DigitalPreservationEurope project, that is respon sible for coordination of digital preservation activities in Europe. Basing on the analysis of former training activities in this field and rewiev of relevant training materials as well as on the results of questionare that was distributed to DPE partners – representatives of archyves, libraries, universities working in digital preservation field – compiled a training programme and now are organising training courses for specialists in digital preservation. This article deals with the needs of training on digital preservation, aims and principles of the relevant training programme. The authors present detailed description of the first training event organised in Vilnius in autumn 2007, including topics discussed, training techniques, on-line pre-course and after-course training materials, evaluation and overall results.

Research Situation Analysis of On-line Detection Technology for Power Transformer Winding Deformation

2020 ◽  
Vol 13 (6) ◽  
pp. 823-832
Author(s):  
Zhenhua Li ◽  
Weihui Jiang ◽  
Li Qiu ◽  
Zhenxing Li ◽  
Yanchun Xu
Keyword(s):  
Detection Method ◽  
Theoretical Research ◽  
Line Detection ◽  
Response Analysis ◽  
Advantages And Disadvantages ◽  
Detection Technology ◽  
The Future ◽  
Transformer Winding ◽  
On Line ◽  
Winding Deformation

Background: Winding deformation is one of the most common faults in power transformers, which seriously threatens the safe operation of transformers. In order to discover the hidden trouble of transformer in time, it is of great significance to actively carry out the research of transformer winding deformation detection technology. Methods: In this paper, several methods of winding deformation detection with on-line detection prospects are summarized. The principles and characteristics of each method are analyzed, and the advantages and disadvantages of each method as well as the future research directions are expounded. Finally, aiming at the existing problems, the development direction of detection method for winding deformation in the future is prospected. Results: The on-line frequency response analysis method is still immature, and the vibration detection method is still in the theoretical research stage. Conclusion: The ΔV − I1 locus method provides a new direction for on-line detection of transformer winding deformation faults, which has certain application prospects and practical engineering value.

scholarly journals Patients' anxiety before cardiac catheterization

2010 ◽  
Vol 8 (4) ◽  
pp. 483-487 ◽  
Author(s):  
Leandro Loureiro Buzatto ◽  
Suely Sueko Viski Zanei
Keyword(s):  
Cardiac Catheterization ◽  
Patient Information ◽  
Scientific Publications ◽  
Patient Understanding ◽  
Post Procedure ◽  
Long Time ◽  
On Line ◽  
First Time ◽  
Multiprofessional Approach ◽  
Pharmacologic Therapies

ABSTRACT Objective: To identify researches related to anxiety and strategies to reduce it in patients who are in the pre-cardiac catheterization period. Methods: A bibliographic research was carried out in the on line databases of PubMed, MedLine, CINAHL, LILACS and SciELO, from 1997 to 2009 in MedLine and from 1999 to 2009 in the others databases. The boolean expressions “and” and “or” has been used with the descriptors in Portuguese and in English. The inclusion of discerning was related about the presence, level and workable of the anxiety from the period of pre-cardiac catheterization. Results: Coping most of 17 researches selected were in American scientific publications, with experimental-descriptive studies. The possibilities of intercurrence and/or complications during and post-procedure, diagnostic, possibility of bad prognostic, being alone during the waiting, the first time submission the procedure, lost information and/or orientation and long time waiting could cause anxiety in pre-cardiac catheterization. Maintenance of escort and family alongside the patient, information adapted to the patient understanding level, overcoming traumas and difficulties with a multiprofessional approach, pharmacologic and non pharmacologic therapies were strategies to reduce the anxiety. Conclusions: The nurses are responsible to provide a humanized assistance to offer a fast recuperation, minimize traumas of the hospitalization and the procedure. The knowledge of the causes and the strategies are fundamental to reduce the level of anxiety in pre-catheterization cardiac.

A Vision-Based Gap Detection Method during the Placement of Large-Scale Composite Structures

2011 ◽  
Vol 186 ◽  
pp. 11-15
Author(s):  
Li Cao ◽  
Wen Chen ◽  
Jun Xiao
Keyword(s):  
Image Processing ◽  
Video Processing ◽  
Composite Structures ◽  
Large Scale ◽  
Low Cost ◽  
High Quality ◽  
Detection Technology ◽  
Gap Measurement ◽  
Automatic Placement ◽  
On Line

Video processing technology is regarded as a low-cost detection technology in complex environment. Because the placement layer is thin and the surface is complex that causes high detection error and high cost in laser measurement. Two problems must be solved before using it in large-scale composite structures automatic placement. One is to obtain the high-quality and stable image, and the other is to improve efficiency of image processing. In this paper, a method obtaining the high quality placement gap images was studied. It made use of the optical characteristics of composite material’s surface texture. And some parameters were determined by experiments. To reduce the calculation cost of image processing, a placement gap measurement method based on line scanning was also proposed here. The method was effective in our detection experiments on an actual workpiece.

scholarly journals Traditional Ulama', Islamic Traditions, and Ngaji Pasanan within the Networked Society

2021 ◽  
Vol 19 (2) ◽  
pp. 266-304
Author(s):  
Mohamad Sobirin
Keyword(s):  
Digital Media ◽  
Live Streaming ◽  
Digital Information ◽  
Political Issues ◽  
The Public ◽  
Digital Space ◽  
Digital World ◽  
Two Samples ◽  
Long Time ◽  
Digital Information Technology

In Ramadan, kiai in various pondok pesantren (Indonesian Islamic Boarding Schools) conduct lecturing activities known as "Ngaji Pasanan". This tradition has been going on for a long time ago till today. However, since 2017 up to now, it has been seen to be held by taking advantage of digital information technology through live streaming via Facebook, YouTube or other media platforms. In 2020, online “Ngaji Pasanan” has become a trend nationwide. This study aims to reveal the context of the online “Ngaji Pasanan phenomenon, which is carried out by the ulama' in pondok pesantren, by taking two samples, namely K.H. Mustofa Bisri and K.H. Said Aqil Siradj. Data collection and analysis used a netnographic approach. This study found that: First, Ngaji Pasanan of the two traditional Ulama' who used digital media were actually conducted offline, but were mediated by the internet and broadcast online. Second, through the online “Ngaji Pasanan”, the two traditional Ulama' not only convey the teachings in the kitab kuning but also contextualize them into socio-religious issues within the digital world, beside they also produce religious discourses and actual nationalities that are being debated by the public, whether in the online or offline context. Third, the presence of traditional Ulama' in the digital space, on the other hand, has been used by netizens to support their opinions by framing their positions on controversial religious and political issues. Fourth, the presence of traditional ulama' in the digital space is more driven by their insistence on addressing the flow of religious and national discourse in the digital space compared to their affirmation of the use of digital technology to carry out the academic tradition of pondok pesantren in Ramadan, namely "Ngaji Pasanan".

Double-Position Positioning Test and Analysis on Holographic / Protruding Lettering of Cigarette Packet Based on Machine Vision

2013 ◽  
Vol 312 ◽  
pp. 597-602 ◽  
Author(s):  
Jie Fang Xing ◽  
Yuan Chen ◽  
Lu Jun He
Keyword(s):  
Vertical Direction ◽  
Development Trend ◽  
Production Quality ◽  
Examination System ◽  
Detection Technology ◽  
On Line ◽  
New Type ◽  
Improve Production Quality ◽  
Normal Production ◽  
The Development Trend

In order to improve production quality and efficiency of cigarette trademark, new type reel cigarette trademark on soft package adopts production mode of reel to reel, which becomes the development trend. This technique makes higher requirements on double-position connection lettering and detection technology of holographic / concave and protruding lettering. This experiment uses on-line quality examination system to conduct the relevant examinations on double-position lettering of holographic / protruding lettering of cigarette packet and makes the analysis. The experiment shows that: holographic lettering quality varies with the amount of lettering and lettering speed. For protruding lettering unit, electrified aluminium in vertical direction has a better result than that in horizontal direction. This study lays a foundation for normal production of machine and further quality inspection after lettering.

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