170,032 research outputs found
Paléosurfaces et leur métallogenèse, par J. C. Samama, éd., 1980
No full textRouvier Henri. Paléosurfaces et leur métallogenèse, par J. C. Samama, éd., 1980. In: Bulletin de Minéralogie, volume 104, 1, 1981. pp. 71-72
17. Richer (Nicolas), Les Éphores. Études sur l'histoire et sur l'image de Sparte (VIIIe-IIIe s. av. J.-C)
No full textSamama Evelyne. 17. Richer (Nicolas), Les Éphores. Études sur l'histoire et sur l'image de Sparte (VIIIe-IIIe s. av. J.-C). In: Revue des Études Grecques, tome 115, Juillet-décembre 2002. pp. 820-821
The Quality of Samama Rotary Cut Veneer
No full textLathe check on veneer is formed as wood response to peeling process, which is usually analyzed in green veneer. After the veneer passed through drying process, the tendency of lathe check rises due to another factor and then it properly named as veneer check. This study was carried out to analyze lathe check and veneer check of samama. The fresh 8 year old samama log was peeled with the thickness of 1.5 mm and 3.0 mm subsequently after pretreatment of boiling in 50˚C for 4 hours and no boiling treatment as the control. Several 2-centimeter wide segmentations were noted from pith to bark and the resulted veneer of each segment was analyzed to determine the quality of lathe check and veneer check. The result showed that the total of peel crack (lathe check) declined from pith toward bark. The thicker veneer produced more lathe checks than the thinner veneer. Whereas, the depth and length of lathe check showed the same tendency as the total lathe check, which showed reduction toward bark’s segmentation. Boiling pretreatment in 50˚C for 4 hours before peeling process tended to increase the quality of samama wood veneer. It was indicated by decreasing in total, length, and depth of lathe checks. Further, it was found that veneer check increased by 19.42-24.94% in comparison to the lathe check. Therefore, the result of this research can be used as consideration in veneer production process of samama including handling and drying, so the quality of the veneer is well sustained
The Quality of Samama Rotary Cut Veneer
No full textLathe check on veneer is formed as wood response to peeling process, which is usually analyzed in green veneer. After the veneer passed through drying process, the tendency of lathe check rises due to another factor and then it properly named as veneer check. This study was carried out to analyze lathe check and veneer check of samama. The fresh 8 year old samama log was peeled with the thickness of 1.5 mm and 3.0 mm subsequently after pretreatment of boiling in 50˚C for 4 hours and no boiling treatment as the control. Several 2-centimeter wide segmentations were noted from pith to bark and the resulted veneer of each segment was analyzed to determine the quality of lathe check and veneer check. The result showed that the total of peel crack (lathe check) declined from pith toward bark. The thicker veneer produced more lathe checks than the thinner veneer. Whereas, the depth and length of lathe check showed the same tendency as the total lathe check, which showed reduction toward bark’s segmentation. Boiling pretreatment in 50˚C for 4 hours before peeling process tended to increase the quality of samama wood veneer. It was indicated by decreasing in total, length, and depth of lathe checks. Further, it was found that veneer check increased by 19.42-24.94% in comparison to the lathe check. Therefore, the result of this research can be used as consideration in veneer production process of samama including handling and drying, so the quality of the veneer is well sustained
Kualitas Kayu Lapis dari Finir Bagian Juvenil dan Dewasa Samama (The Quality of Plywood Made from Juvenile and Mature Wood Veneer of Samama
No full textThis study designed 7 types of plywood that were arranged by juvenile and mature part of samama (Anthocephalus macrophyllus) wood, The adhesive used was urea formaldehyde with addition of hardener (NH4Cl) in ratio of 100:1 (weight/weight). The adhesive was applied on both surfaces of core veneer, which were loose and tight surfaces, with glue spread was 150 g m-2. The veneers were arranged in accordance with the research design and the resulted structures were then hot pressed at 110 C for 30 seconds per mm of the plywood’s thickness. The pressure was 10 kg cm-2. The results showed that bonding strength of plywood made from juvenile samama veneer was lower than that of the mature one, although the value was still met SNI standard for type I interior plywood. Furthermore, plywood’s moisture content was also met the requirement of the standard. Plywood density was increased by 11-12% from that of the wood. These findings suggest the suitability of both juvenile and mature wood of samama for the material of good quality plywood. Further studies on determination of other veneer-based products, such as laminated veneer lumber (LVL), were then recommended.Keywords: juvenile, mature, plywood, samama, urea formaldehyd
The International Normalized Ratio Calibrated for Rivaroxaban-(INRrivaroxaban) has the Potential to Normalize PT Results for Rivaroxaban-treated Patients : Results of an in-vitro Study
No full textGoing 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
Peningkatan Kerapatan Kayu Samama Melalui Pre-kompresi Asam Sitrat (Density Improvement of Samama Wood by Pre-compression of Citric Acid)
No full textSamama wood (Anthocephalus macrophyllus (Roxb.) Havil.) is a potential fast-growing species of Sulawesi and Maluku. This study aimed to increase the density of the wood through citric acid pre-compression. The temperature/time pressing formula and the optimal concentration of citric acid for fixation were also determined. Water saturated samples of (5x5x4) cm3 (L = longitudinal x T = tangential x R = radial) were pre-compressed at 100 °C for one hour to reach drying set. Subsquently, the samples were soaked for 4 hours in a citric acid solution of 5% and 10% concentration, drained and wrapped in aluminum foil before re-pressed at 180 °C for 10, 20, 30, 40, 50, and 60 minutes. Fixation was measured by soaking the samples into water for 24 hours at room temperature. The results showed that the moisture contents at fiber saturation point ranged from 33.15-33.94%, with density of 0.46 g cm-3 and oven dry density of 0.37 g cm-3. The L, T, and R shrinkages were 0.18-0.20%, 4.13-4.14%, and 2.53-3.10%, respectively; while the T/R ratio was 1.33-1.63%. Pre-compression can only be done at a compression target of 25% with compression level of 19.57-20.01%. Pre-compression increased the oven dry density of 17.11-20.13% to 0.44-0.45 g cm-3. After thickness recovery, the weight of the oven dried samples increased by 1.79-2.72% at the 5% citric acid concentration and by 12.04-15.25% at the 10% citric acid concentration. Permanent fixation achieved at 180 °C for 50 minutes pressing time with 10% citric acid concentration
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
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