170,197 research outputs found
Woody biomass of invaded karstic pastures - a case study at Podgorski kras plain
No full textRaziskava je del projekta, ki preučuje ogljikov cikel na zaraščajočih kraških pašnikih v submediteranskem območju Slovenije na Podgorskem Krasu (JZ Slovenija). Analize smo opravili na dveh raziskovalnih ploskvah v različnih stadijih zaraščanja z gozdom (pašnik in z drevjem deloma zarasel pašnik). Cilj našega dela je bila ocena biomase lesnatih rastlin na zaraščajoči površini in primerjava s pašnikom. Delali smo v skladu z metodologijo kot jo predlaga Terrestrial Carbon Observation Panel (TCO), ki je del Global Terrestrial Observing System (GTOS) - http://www.fao.org/gtos. Na podlagi natančne inventure lesnatih rastlin smo s pomočjo alometrijskih funkcij izračunali biomaso lesnatih rastlin. Skupna biomasa lesnatih rastlin na zaraščajočem se pašniku je bila ocenjena na 32.065 t ha-1. Glavnina (86%) vse biomase odpade na puhasti hrast (Quercus pubescens L.). Z dendrokronološko študijo smo na vzorcu 18 dreves preučili tudi priraščanje biomase v času in prostoru. Ugotavljamo, da je v 52 letih gozd zasedel kar 21% suhega kraškega pašnika. Analiza volumenskega prirastka je še pokazala, da nobeno od analiziranih dreves še ni doseglo kulminacije volumenskega prirastka in da je to z vidika ponora ogljika zaželeno. Naša spoznanja so pomembna za razumevanjeprostorskih in časovnih sprememb v zalogah ogljika in o pomenu gozda za shranjevanje ogljika in blaženje klimatskih sprememb.Our research was part of a broader study that deals with the carbon cycling in abandoned karstic pastures of Slovenian sub-mediterranean region (Podgorski kras, SV). At this site two study plots that differ in succession (pasture andgrassland invaded by woody plants) are researched. The aim of our work wasto make estimation of woody plants biomass at invaded area. The method for the field measurements of biomass was one proposed by Terrestrial Carbon Observation panel (TCO) of, the Global Terrestrial Observing System programme (GTOS) (http://www.fao.org/gtos/). We did an inventory and we calculate total woody biomass for each species with different allometric equation. Total woody biomass of the site was estimated to 32,065 t , and was mainly contributed by pubescent oak (Quercus pubescens L., 86 % of total). We did also a dendrocronological measurement, we took samples from 14 trees with a increment borer and we also collected disks from 4 trees. In 52 years the forest overgrowth 21% of dry karstic pastures we can see that in ours samples trees, we observe a significant growth in these years analizing our samples trees. None of the trees in our case culminate and biomass production is in all trees in exponential increase that culmination is reached at very high ages so basically carbon storage is constantly increasing. The information on diameter increment and growth patterns of trees contributes to understand the changes in carbon stock during woody plant encroachment
Positional Comparisons in the Impact of Fatigue on Movement Patterns in Hockey
No full textPurpose: To examine the influence of the match period on the movement patterns of hockey players according to their playing positions under the introduction of quarters (QTRs). Methods: Sixteen subelite-level Spanish National League male hockey players participated in the study (age: 25.5 [2.9] y; body mass: 74.6 [5.5] kg). Global positioning system devices were used to monitor players’ running performance during 17 competitive matches (113 match-play profiles). Only players who played for at least 85% of the game were analyzed. Players were placed into 3 position categories: backs, midfielders, and forwards. Results: Moderate to large differences in relative total distance were found between midfielders and both backs and forwards in all QTRs (effect size [ES]: 0.4–1.2). ES for total distance was moderate for midfielders when compared with backs during the first QTR (moderate ES: 0.7). Midfielders and forwards covered more distance (m and m·min−1) in high-velocity zones than backs (ES: 0.6). Acceleration activities (n·min−1) at moderate and high intensities decreased in all groups across QTRs with moderate to very large ES (ES: 0.4–1.4). Relative sprinting distance decreased in backs (ES: 0.8). Backs had fewer repeated-sprint bouts (n and n·min−1) as the game progressed (ES: 1.0). Conclusions: During competitive match play, a degree of positional variation can be observed across QTRs. The relative distance and the number of accelerations and decelerations at moderate and high intensity decreased across QTRs. No between-QTRs differences in high-speed activity were reported.</jats:p
La explotación de los recursos cárnicos en la frontera del Reino Nazarí de Granada.: Un estudio de caso en el yacimiento de La Moraleda (Antequera, Málaga)
No full textThe border area between Nasrid and Castille Kingdom created a special situation which influenced every aspect of life in nearby settlements. In this study, we compare fauna from the site of La Moraleda (14th-15th C., Antequera, Málaga) to other coetaneous sites from the interior of Nasrid Kingdom, to determinate if this situation also afected the usage and consumption patterns of the livestock. The faunistic data of La Moraleda shows a important presence of large ungulates, which has been explained by the military conflict that caused a decreased in the usual meat resources (sheeps and goats) forcing people to use alternatives such as bovinae, equidae and great hunting.La aparición de la frontera entre el Reino Nazarí de Granada y la Corona de Castilla creó una situación especial que influyó en casi todos los aspectos de la vida de las poblaciones cercanas. En este estudio comparamos la fauna obtenida en el yacimiento de La Moraleda (ss. XIV-XV, Antequera, Málaga) con la de otros yacimientos coetáneos del interior del reino nazarí para comprobar si esta situación también afectó el manejo y pautas de consumo de la cabaña ganadera. El yacimiento de La Moraleda muestra una presencia mucho más elevada de grandes ungulados, que ha sido explicada porque el conflicto militar que sufrió la zona redujo la disponibilidad de las fuentes de carne habituales (ovejas y cabras) obligando a sus habitantes a explotar alternativas como el vacuno, los équidos y la caza mayor
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
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
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