gebhart/patrepeval huggingface dataset:
Silk Fibroin/Calcium Phosphate Silicate Composites: In vitro Bioactivity (2013)

Co mposite materials of Silk Fib roin (SF) and Calciu m Phosphate Silicate (CPS) ceramic in the 15CaO-6SiO2-0.5P2O5 system were prepared by method of mixing d ifferent percentage of component weight. The structure was characterized before and after in vitro test by FTIR, SEM. The concentration of Ca, Si and P after in vit ro test was analysed by ICP-A ES. FTIR of the composites before in vitro test depicts that random coil and β-sheet structures co-exist in the co mposites. CPS ceramic has a significant effect on the secondary structure of SF. SEM observed that CPS particles uniformly dispersed in SF matrix. FTIR of the composites after in vitro test revealed that carbonate containing hydroxyapatite (CO3HA) was formed on the surface. B-type CO3HA preferentially formed in the samp le with 75 wt. % CPS ceramic. SEM proved that hydroxyapatite (HA) fo rmed in a high level. ICP-A ES showed that HA precipitation were similar fo r the three composites. Based of these results, it can be concluded that the incorporation of CPS ceramic powder enhanced the in vitro bioactivity.
Digital frequency and <i>Q</i> tuning techniquefor low-voltage active filters (1999)

A digital frequency and Q tuning technique is proposed for low-voltage (1 V) active RC biquad filters that uses programmable capacitor arrays (PCAs). The proposed technique does not require any peak detectors, which are difficult to implement at low voltages. Instead, it uses a small number of analogue comparators, a digital comparator and binary counters to adjust the PCAs.
Oscillatory patterns in hippocampus under light and deep isoflurane anesthesia closely mirror prominent brain states in awake animals (2015)

The hippocampus exhibits a variety of distinct states of activity under different conditions. For instance the rhythmic patterns of activity orchestrated by the theta oscillation during running and REM sleep are markedly different from the large irregular activity (LIA) observed during awake resting and slow wave sleep. We found that under different levels of isoflurane anesthesia activity in the hippocampus of rats displays two distinct states, which have several qualities that mirror the theta and LIA states. These data provide further evidence that the two states are intrinsic modes of the hippocampus; while also characterizing a preparation that could be useful for studying the natural activity states in hippocampus.
[Brain cell apoptosis after cerebral hypoxia-ischemia in neonatal rat]. (1998)

In the HIE, apoptosis appears earlier than necrosis, and both of the different cell death forms may exist induced dose relativity.
Axially Loaded Sandwich Panels (1987)

In recent years there has been a dramatic increase of interest in sandwich cladding panels consisting of metal faces and a rigid foam core. Previous studies have concentrated on the behavior of these panels when subject to bending action due to wind and snow load and under temperature gradient. Comparatively little is known about their behavior under axial compressive load when acting as load‐bearing wall panels. This paper first considers appropriate methods of analysis for sandwich panels subject to combined axial compressive load and bending moment and an exact finite element is derived. Some early and previously unpublished tests are described and the results compared with the theoretical values. It is concluded that great care must be taken in the design of load bearing wall panels because of the interaction between local and global buckling and their sensitivity to eccentricity of load.
Digital filtering in FPGAs (2002)

While the general purpose logic elements of the field programmable gate array (FPGA) appear to be unlikely candidates for implementing the multiply-intensive operations of digital filtering, the application of distributed arithmetic (DA) techniques turns the FPGA into a worthy contender. Indeed, in some important filter applications the Xilinx 4000 family of FPGAs offers superior performance over the fastest fixed point DSP microprocessors. A brief description of DA processing is presented to provide some background for the filter design examples that are presented. A simple FIR filter will serve to establish the design concepts, and a two dimensional Sobel edge detector will serve to illustrate the performance capabilities of this approach.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The Relationship Between The Sterling Quality Framework And Student Achievement In One Florida School District (2010)

The focus of this research was to determine the relationship, if any, between student achievement and the implementation of the Sterling Quality Management System in a southwest Florida school district. A quantitative analysis focused on three sources of data. Two surveys provided by the Florida Sterling Council were used to collect data from school based personnel and student achievement gain scores obtained from the Florida DOE School Accountability Report 2005-2009. In this study, little positive correlation was found between perceived implementation of Sterling practices and student achievement gains. Of a possible score of 5, the total mean implementation score across all groups was found to be 4.14. This meant that the perceived level of Sterling implementation among respondents overall was very high. No significant correlation was found between the total average Sterling implementation mean score and student achievement gains (school points) made between 2005 and 2009. Overall, very few correlations were found to be statistically significant. This suggested the lack of a linear relationship between Sterling implementation and student achievement gains in the schools in the study Following are recommendations for future research. 1. This study could be repeated using a population of multiple school districts in Florida or in different states. 2. This study could be repeated using different measures of student achievement, such as end of course exam results, SAT or ACT scores, or achievement in Advanced Placement or International Baccalaureate programs in high schools. iv 3. This study could be repeated with a population of administrators that includes all school principals and assistant principals. 4. This study could be repeated in a school district that has achieved the Sterling Quality award. 5. This study could be repeated to determine a relationship between Sterling Quality and other school effectiveness measures, such as parent involvement, community support, and teacher retention. 6. Determine the relationship if any that the implementation of Sterling Quality practices at the district level has on student achievement.
Effects of Water and Nitrogen Utilized by Means of Dripping on Growth of Root and Canopy and Matter Distribution in Spring Wheat (2013)

In order to provide scientific strategies of water and nitrogen regulation, the effects of different amount of watering and nitrogen rate by means of drip irrigation on root/shoot growth and matter distribution in wheat were studied by using methods of soil drill sampling and growth analysis. The results indicated that reducing drip irrigation amounts and nitrogen rate would cause root weight decreased, shoot growth reduced and yield dropped. In water deficit irrigation treatments (2400 m3/ha), root length and root surface area increased in flowering stage, but rapid declined in milking stage, that severely hampered leaf growth and grain grouting. In milking stage, appropriate irrigation amount (3600 m<sup>3</sup>/ha) could maintain higher root weight, root length and root diameter that promoted root/shoot coordinated growing. Nitrogen deficiency significantly reduced dry matter accumulation amount of stem in flowering stage and root length and root surface area in milking stage, that was not conductive to the extension and fulfilling of roots functions and leaded to canopy severely premature aging. High nitrogen supply (urea 450 kg/ha) would cause vigorously growing of shoot and declining of the growth quality of spike and decreasing of the economic coefficient. Water and nitrogen had significant collaborative compensation effects on root/shoot growth and yield traits and the effects of regulating water by nitrogen supply on root traits was larger than on shoot, while regulating nitrogen by water supply on shoot traits was larger than on root, so in actual production, it was necessary to maintain a high level of nitrogen supply in flowering stage but a appropriate level of water supply in milking stage. The drip irrigation amounts and nitrogen rate and yield components indicators in high-yielding drip irrigation wheat field were put forward by analyzing quadratic polynomial equation built by the data of water and nitrogen two factors field experiments.
On the Role of Substrate Diffusion in Enzyme Electrodes (1971)

The determination of a substrate concentration by an enzyme electrode is an indirect method which involves several consecutive processes. The first is diffusion of substrate through a semipermeable membrane which separates the test solution from the enzyme layer. If diffusion through this membrane is made the rate-determining step of the overall process, linearity and time stability of the enzyme electrode are considerably improved. The theory of the influence of substrate diffusion is derived for a simplified model and compared with experimental results obtained with an enzyme electrode for lactate.
Convenient Synthesis of some new purine analogues incorporating furan nucleus (2014)

Sodium 3-(furan-2-yl)-3-oxoprop-1-en-1-olate was used as precursor for synthesis of some novel derivatives of various fused heterocyclic ring systems namely pyrazolo[1,5-a]pyrimidines, triazolo[1,5-a]pyrimidines, benzo[4,5]imidazo-[l,2-a]pyrimidines, pyrazolo[5,l-c]triazines, [l,2,4]triazolo[4,3-c]triazines, benzo[4,5]imidazo[2,1-c]triazines. The structures of the newly synthesized were established on the basis of their spectral data, elemental analyses and alternate synthetic route whenever possible.
Reliability concept for electric fuses (1997)

When fuses are subjected to current pulses, cyclic stress is induced owing to temperature variations. Damage in the fuse elements is gradually accumulated and results in resistance increase. Consequently, current–time characteristics shift to effect early operation during the normal service period. Under such circumstances, proper protection required for other equipment will not be achieved. Reliability concerns for after sales service arise owing to these facts. The paper presents a method for predicting lifetimes of fuses for cyclic loading. The physical model is based on the description of elastic, plastic and creep deformation during a series of current pulses. In comparison with existing methods and IEC recommendations, it has the advantage of requiring a very limited number of tests. Results from the physical model can be used to evaluate practical fuse designs and provide advanced information for fuse replacements. The method has been demonstrated for commercial time-lag miniature fuses, low-voltage fuses with M-effect, low-voltage fuses for semiconductor protection, and high-voltage fuses for motor protection.
Glycosyl composition of polysaccharide from Tinospora cordifolia. (2003)

Polysaccharide from Tinospora cordifolia was isolated, purified, hydrolysed, trimethylsilylated and then subjected to GC-MC studies. The polysaccharide composition was estimated as follows: glucose 98.0%, arabinose 0.5%, rhamnose 0.2%, xylose 0.8%, mannose 0.2% and galactose 0.3%.
Earnings Functions, Rates of Return and Treatment Effects: The Mincer Equation and Beyond (2005)

This paper considers the interpretation of "Mincer rates of return." We test and reject the Mincer model. It fails to track the time series of true returns. We show how repeated cross section and panel data improves the ability of analysts to estimate the ex ante and ex post marginal rate of returns.
Organically modified silicates (ormosils) as adhesives for siliceous surfaces (1987)

Abstract Adhesion to glass surfaces still may be a problem under “heavy duty” conditions such as temperature and moisture or both. In many cases the problem may be overcome by use of adhesion promoters such as reactive silanes. These silanes remove water films from the glass surface by chemical reaction, are able to form chemical bonds to the glass surface and, in addition to this, can have an affinity to the sealing material to be used. A decay of adhesion strength between glass and a seal under wet conditions is caused by the following effect:
The case for real time MPEG testing (1997)

MPEG2 and associated standards such as DVB and ATSC require not just a new terminology but also completely new methods of test and measurement. When several pieces of compression equipment refuse to work together it is not always clear where the fault lies. Although off-line analysis can be used for development, real time monitoring analysis is needed in the field. This paper gives a brief guide to ideal MPEG testing and monitoring, with suggested configurations, at all levels from multi-transport stream bouquets right down to the macroblock level video coding decisions. The test and measurement of networks, multiplexers, encoders, decoders and receivers is addressed and a list of service information (SI) which need monitoring is given.
Substrate triggering and salicide effects on ESD performance and protection circuit design in deep submicron CMOS processes (2002)

The effect of salicides and the influence of the local substrate potential on ESD performance of deep submicron nMOS transistors have been studied. It is shown that salicidation causes a strong dependence of ESD performance on effective channel length in these devices. Salicides also impact the behavior of the lateral npn parasitic bipolar transistor by affecting the emitter efficiency. A higher local substrate potential has been shown to have a positive impact on ESD performance. Based on these results we have designed and demonstrated a substrate triggered nMOS protection circuit which provides >2 kV ESD performance in a fully salicided process.
Developing a New Powered Seed Delivery System with Constant Seed Release Speed Using Two Confronting Belts (2018)

Seed delivery devices are aimed to carry seeds down to open furrow that might affect uniformity of plant stand and spacing. The objective of this study was to develop and evaluate a new seed delivery system utilizing a two-belt mechanism configuration for sunflower (Helianthus annuus). A prototype were fabricated and tested with MeterMax? Ultra Test Stand in order to evaluate the new seed delivery system. The outcomes show that dependent variables like seed population, singulation, skips, and multiples rates were not affected by planting speed levels (Pvalues > 0.05), while planting speed had a negative effect on seed spacing consistency (P-values < 0.05). In addition, due to facing broken seeds during test process, multiples rate were between 8.0 to 9.5% and consequently affected other variables as well. To improve this mechanism and avoid the systematic error that caused by broken seeds, this system should be redesigned in a single-belt form.
A SHORT DESCRIPTION OF ANDROSACE GENRE PLANTS PRESENT IN ALEXANDRU BELDIE HERBARIUM FROM I.N.C.D.S. BUCHAREST (2017)

”Marin Drăcea” National Institute for Research and Development in Forestry from Bucharest has in its possession a Herbarium with a rich collection of plants (approximately 60.000 plates) and which is registered in Index Herbarium. The Alexandru Beldie Herbarium consists of private donated collections as well as collections obtained through exchanges of plates. For the present article, 66 plates from the Herbarium were studied, namely the ones belonging to the Androsace genre. The plates were then systemized on species (19 to be specific), harvest year, place of origin and after the specialist that has gathered them. The Androsace species were harvested from Romania, as well as other countries and are in a very good conservation state, even though some species were harvested starting with the year 1840. Most species were gathered in the interval 1940-1949. The Al Beldie Herbarium offers significant historical data which is a valuable research resource, together with rich data concerning the species, their origin place and developing conditions.
Bolt-Plate Fixation for Anterior Spinal Fusion (1986)

A bolt-plate device for fixation of distal thoracic and proximal lumbar vertebral bodies has proved effective in a variety of surgical situations. The instrumentation is designed to obtain the optimum conditions for the healing of cancellous bone, namely, rigid immobilization and, if possible, close apposition of surfaces. The device may also be effectively employed to protect grafts used to replace a vertebral body.
Functional analysis of the ClpATPase ClpA of Brucella suis, and persistence of a knockout mutant in BALB/c mice The GenBank accession number for the sequence reported in this paper is AJ224881. (2000)

The protein ClpA belongs to a diverse group of polypeptides named ClpATPases, which are highly conserved, and which include several molecular chaperones. In this study the gene encoding the 91 kDa protein b-ClpA of the facultative intracellular pathogen Brucella suis, which showed 70% identity to ClpA of Rhodobacter blasticus, was identified and sequenced. Following heterologous expression in Escherichia coli strains SG1126 (DeltaclpA) and SG1127 (Deltalon DeltaclpA), b-ClpA replaced the function of E. coli ClpA, participating in the degradation of abnormal proteins. A b-clpA null mutant of B. suis was constructed, and growth experiments at 37 and 42 degrees C showed reduced growth rates for the null mutant, especially at the elevated temperature. The mutant complemented by b-clpA and overexpressing the gene was even more impaired at 37 and 42 degrees C. In intracellular infection of human THP-1 or murine J774 macrophage-like cells, the clpA null mutant and, to a lesser extent, the strain of B. suis overexpressing b-clpA behaved similarly to the wild-type strain. In a murine model of infection, however, the absence of ClpA significantly increased persistence of B. suis. These results showed that in B. suis the highly conserved protein ClpA by itself was dispensable for intramacrophagic growth, but was involved in temperature-dependent growth regulation, and in bacterial clearance from infected BALB/c mice.
Effect of Nitrogen Concentration of the Nutrient Solution on the Volatile Constituents of Leaves of <i>Salvia fruticosa</i> Mill. in Solution Culture (2003)

Essential oils from hydroponically cultivated Salvia fruticosa were analyzed by GC-MS techniques. Three different levels of nitrogen (100, 150, and 200 mg/L) were used in the nutrient solution for the cultivation, using the nutrient film technique. A total of 79 compounds were identified, and qualitative and quantitative differences have been observed between the samples collected at full bloom (flowering stage) and at the end of the seed formation stage. 1,8-Cineole, beta-caryophyllene, and viridiflorol were the predominant constituents in most cases. 13-epi-Manool was identified by using GC parameters and mass spectrum fragmentation pattern, whereas labd-7,13-dien-15-ol, a labdane type diterpene, was identified for the first time in the genus Salvia, using GC parameters and an authentic sample. The results obtained from GC-MS analyses were submitted to chemometric analysis.
Small cell carcinoma of the ovary with hypercalcemia: A report of eleven cases (1982)

Eleven cases of a small cell ovarian cancer associated with hypercalcemia that was reversed by removal of the tumor are reported and compared with three similar cases in the literature. The 14 cases account for 50% of recorded cases of ovarian-cancer-related hypercalcemia. The 14 tumors occurred in women between the age of 13 and 35, with an average of 22 years and, with two exceptions, behaved clinically in an aggressive fashion. Light and electron microscopic study confirmed the epithelial nature of the neoplasms but failed to disclose their specific subtype or origin.
AN EFFICIENT IMAGE COMPRESSION ALGORITHM FOR BAYER-PATTERN IMAGES (2015)

In this paper, an efficient image compression algorithm for Bayer-pattern images is introduced. In Bayer pattern images each pixel is represented by 8-bit rather than 24-bit for colour images. The proposed algorithm separates the colour information from the Bayer-pattern image data before performing the compression operation. It partitions each colour plane into fixed size blocks. Each block is classified as a low or high intensity variation block using the standard deviation which compared against a predefined threshold. The low intensity variation blocks are encoded by its average while, the other blocks are encoded using the minimum, quantisation step and the bit plane. The quantisers that used in this paper are from 32 and 16 levels types. The effect of the block size on the output bit rate and image accuracy is studied. The results clarify that a good performance is achieved using 4×4-pixel blocks. Using 32 and 16 quantisation levels a bit rates of 1.8 to 5.2 bpp with a PSNR of 30 to 45 dB can be achieved for a range of thresholds 10 to 0.5.
200 Years of Hydrography of Adriatic (2006)

Years of Hydrography of AdriaticAn important anniversary to be celebrated this year is the 200th anniversary of hydrography or, to be more precise, 200 years since the beginning of the depth survey and chart plotting of the eastern Adriatic coast.