169,772 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
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
โปรตีนโพรไฟล์ใน Chlorella spp., Desmodesmus spp., และ Scenedesmus spp. ซึ่งเลี้ยงที่อุณหภูมิช่วง 28°C - 40°C และการวิเคราะห์ลายพิมพ์ดีเอ็นเอและปริมาณบีตาแคโรทีน
No full textThesis (M.Sc.)--Chulalongkorn University, 2010Green microalgae including Chlorella spp., Desmodesmus spp. and Scenedesmus spp. are primary producers in the aquatic ecological systems. Deleterious effects on the primary producers undoubtedly lead to harmful effects on the consumers including human along the food chains. In addition, these microalgae have been found to be microorganisms for the production of useful products at laboratory scale which, with further research, could potentially be scaled-up to pilot and industrial scales. With the imminent global warming and its effects on primary producers including green microalgae and with the industrial importance of selecting fast-growing and heat-tolerant green microalgae for industries, this research was initiated with the aims of selecting fast-growing and heat-tolerant strains from 5 strains each of Chlorella spp., Desmodesmus spp. and Scenedesmus spp. The second aim of the research is to gather preliminary results on mechanisms of heat-tolerance in terms of existing β-carotene contents at 25°C and SDS-PAGE protein profiles when 5.5 x 10[superscript 6] CFU/ml of each strain were grown at 28°C-32°C in a temperature-controlled greenhouse and at 28°C-32°C for 16 h alternated with growth at 40°C for 8 h in a temperature - controlled water bath placed in the greenhouse throughout the experiments. Results of RAPD-PCR fingerprints of the 15 green microalgal strains showed they were different strains. Growth at 25°C showed unicellular green microalgae Chlorella spp. grew more rapidly than multicellular microalgae Desmodesmus spp. and Scenedesmus spp. Growth at 28°C-32°C and at 28°C-32°C for 16 h alternated with 40°C for 8 h showed Chlorella spp. strains PK37 and SS1 were heat-tolerant while Desmodesmus spp. strains NJ40 and SS5 were mesophilic. No correlation was obtained between heat tolerance or mesophilicity properties and contents of β-carotene and polypeptides which had similar molecular weights to those of heat-shock proteins.สาหร่ายสีเขียวขนาดเล็กรวมทั้ง Chlorella spp., Desmodesmus spp., และ Scenedesmus spp. เป็นผู้ผลิตขั้นต้นในระบบนิเวศน์แหล่งน้ำ ผลร้ายแรงต่อผู้ผลิตขั้นต้นย่อมส่งผลร้ายแรงต่อผู้บริโภครวมถึงมนุษย์ซึ่งอยู่ในห่วงโซ่อาหาร นอกจากนั้นสาหร่ายสีเขียวขนาดเล็กเหล่านี้ผลิตสารที่มีประโยชน์ในระดับห้องปฏิบัติการ ซึ่งสามารถขยายส่วนเป็นระดับนำร่องและระดับอุตสาหกรรม เนื่องจากสภาวะโลกอุ่นส่งผลต่อผู้ผลิตขั้นต้นรวมทั้งสาหร่ายสีเขียวขนาดเล็ก และสาหร่ายสีเขียวขนาดเล็กมีความสำคัญทางอุตสาหกรรมดังกล่าวข้างต้น วัตถุประสงค์ประการแรกของงานวิจัยนี้เพื่อคัดเลือกสาหร่ายสีเขียวขนาดเล็กสายพันธุ์ที่เพิ่มจำนวนเร็วและทนร้อน โดยคัดเลือกจากสาหร่ายสีเขียวขนาดเล็ก Chlorella spp., Desmodesmus spp., และ Scenedesmus spp.ชนิดละ 5 สายพันธุ์ รวมเป็น 15 สายพันธุ์ วัตถุประสงค์ประการที่สองเพื่อรวบรวมผลการทดลองเบื้องต้นที่จะใช้อธิบายกลไกการทนร้อนในสาหร่ายสีเขียวขนาดเล็กสายพันธุ์ที่คัดเลือกได้ ในแง่ของปริมาณบีตาแคโรทีนที่มีอยู่ในเซลล์ที่เลี้ยงที่ 25°C และโปรตีนโพรไฟล์หลังจากเลี้ยงเซลล์ 5.5 x 10[superscript 6] โคโลนีต่อมิลลิลิตรของแต่ละสายพันธุ์ที่ 28°C -32°C 16 ชั่วโมงสลับกับเลี้ยงที่ 40°C 8 ชั่วโมงในอ่างน้ำควบคุมอุณหภูมิที่วางในเรือนเพาะปลูกพืชทดลองตลอดการทดลอง ผลการหาลายพิมพ์ดีเอ็นเอของสาหร่ายสีเขียวขนาดเล็กทั้ง 15 สายพันธุ์โดยวิธี RADP-PCR พบว่าเป็นสายพันธุ์ต่างกัน ผลการเลี้ยงที่ 25°C แสดงให้เห็นว่าสาหร่ายสีเขียวขนาดเล็กเซลล์เดียว Chlorella spp.เพิ่มจำนวนเร็วกว่าสาหร่ายสีเขียวขนาดเล็กหลายเซลล์ Desmodesmus spp. และ Scenedesmus spp. ผลการเลี้ยงที่ 28°C -32°C และที่ 28°C -32°C 16 ชั่วโมงสลับกับ 40°C 8 ชั่วโมง พบ Chlorella spp. สายพันธุ์ PK37 และ SS1 ทนร้อน และพบ Desmodesmus sp. สายพันธุ์ NJ40 เพิ่มจำนวนได้ดีที่อุณหภูมิสูง ผลการทดลองไม่พบความสัมพันธ์ระหว่างความสามารถในการทนร้อนหรือการเพิ่มจำนวนได้ดีที่อุณหภูมิสูง กับปริมาณบีตาแคโรทีนและปริมาณพอลิเปปไทด์ที่มีขนาดโมเลกุลเท่ากับโปรตีนที่สร้างขึ้นเมื่อได้รับความร้อนกระทันหั
Social Challenges and Learners' Academic Performance: A Case of Selected Primary Schools in Lusaka District, Zambia
No full textAbstract: Social issues, also called social problem, a state of affairs that negatively affects the personal or social lives of individuals or the well-being of communities or larger groups within a society and about which there is usually public disagreement as to its nature, causes, or solution. Social challenges are common problems in present-day society and one that many people strive to solve. Social challenges are those conditions or behaviors that have negative consequences at the personal and work level. In addition, social challenges are issues and problems facing human beings today. Hence, the study aimed at examining the effects of social challenges on learners’ academic performance in some selected primary schools of Lusaka district, Zambia. The study was guided by the following specific objectives: (a) To identify the common types of social challenges exhibited by learners in selected primary schools of Lusaka district, (b) To examine the effects of social challenges on learners’ academic performance in selected primary schools of Lusaka district and (c) To offer recommendations on how best social challenges can be dealt with in selected primary schools of Lusaka district. Purposive sampling of the site was preferred to select the research area from which respondents participated in this study with a sample size of 140. The study employed both the qualitative and quantitative methods that sampled head teachers, primary teachers, pupils and community members. Interview guides were used to obtain qualitative data which was analyzed using thematic analysis while quantitative data were collected using questionnaires which were analyzed using descriptive statistics. The study found out that, most exhibited social challenges in primary schools were; peer pressure, drug abuse, child abuse, economic background and media influence. The study therefore recommended that teachers should pay special attention and identify different types of social problems among their leaners. Also, the study suggested that leaners should be sensitized fully on how to protect themselves from social challenges, more specifically from issues of child abuse.
Keywords: Academic Performance, Child Abuse, Effect, Learners School and Social Challenges.
Title: Social Challenges and Learners’ Academic Performance: A Case of Selected Primary Schools in Lusaka District, Zambia
Author: Chanda Chansa Thelma
International Journal of Novel Research in Humanity and Social Sciences
ISSN 2394-9694
Vol. 10, Issue 5, September 2023 - October 2023
Page No: 38-49
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 16-September-2023
DOI: https://doi.org/10.5281/zenodo.8351325
Paper Download Link (Source)
https://www.noveltyjournals.com/upload/paper/Social%20Challenges%20and%20Learners’%20Academic-16092023-4.pdfInternational Journal of Novel Research in Humanity and Social Sciences, ISSN 2394-9694, Novelty Journals, Website: www.noveltyjournals.co
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
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
An Article About Albertus C. Van Raalte, Author Unknown, Except for Parts Taken from an Article by Anna C. Post
No full textAn article about Albertus C. Van Raalte, author unknown, except for parts taken from an article by Anna C. Post. The author knew first generation persons in the Holland settlement and therefore, the article has some value.https://digitalcommons.hope.edu/vrp_1890s/1012/thumbnail.jp
Archivist, Archaeologist, Author and the Tactile Window
No full textThe idea that the predominant way of engaging with architecture is through vision is not uncommon but also not always the most appropriate given that buildings are also experienced through tactile interventions. This consequence that emphasises visual aesthetics in order to appreciate and understand architecture probably has much to do with the assumed but rather vaguely defined role of the architect as designer in the practice of architectural design. A resulting misapprehension is that architects designing for visual appreciation think that they are actually designing physical space for embodied tactile engagement.
This prioritisation of vision in the way architects think about and approach design is questioned through the design project of the Tactile Window in which the position of the architect is redefined through inhabiting the roles of archivist, archaeologist and author during the design process.
A 16th century portrait of Queen Elizabeth I known as the Ditchley portrait, currently on display at the National Portrait Gallery is used as the source from which the design of the Tactile Window is derived from and refers back to. Questioning the validity of vision as the sole means of engaging with the work, information about the portrait and working methods gathered from the three carefully chosen positions mentioned above are drawn on and applied to the making of this Tactile Window that becomes an alternative Ditchley portrait. Through exploring the hidden historical and current narratives of and in the existing portrait, the presence of the portrait is alluded to on an alternative physical site. Key to this are the working methods of an invented archival system of design reasoning, the unearthing of archaeological texts and assuming of authorship within the individual frameworks of the roles of archivist, archaeologist and author.
The redefined role of the architect as archaeologist takes onboard the unearthing of associated drawings and writings as well as the methods of organising and applying the recovered information to the system set up by the archivist. This analysis of the graphic and text based information is used to formulate historical narratives that are woven into the design project. Whereas traditional archaeology stresses on the study of a site from a site with quantifiable limits to the physical context, the notion of archaeological sites in this instance refers to the places where the stored information is unearthed. Through the careful process of archiving and analysing this information, a new site that is located within both the physical and historical contexts of interest is discovered. The author then draws upon the elements in the archival system that includes the findings of the archaeologist to construct the alternative Ditchley portrait in this new site of the Echoing Cedar, the result of which bears no visual resemblance to the existing work.
The Tactile Window is a reading of the Ditchley portrait in which information about and in the painting is transformed into a design proposal for an inhabited structure. The intended method of interaction with this alternative portrait is not merely restricted to vision but relies on engagement with the other senses. This experience is enhanced by the interplay with certain site conditions such as wind and rain in order to allude to specific aspects of the Ditchley portrait that are not visually apparent in the existing work.
In the processes of excavating, finding and revealing the hidden information to create this alternative portrait, the effects of the visuals afforded by the existing portrait inadvertently begin to fade as the validity of a single means of visual expression is questioned
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