gebhart/patrepeval huggingface dataset:
Growth of inch-sized KCa<sub>0.8</sub>Sr<sub>0.2</sub>I<sub>3</sub>:Eu<sup>2+</sup>scintillating crystals and high performance for gamma-ray detection (2016)

A quaternary iodide KCa0.8Sr0.2I3:Eu2+ scintillator with 2.5% energy resolution at 662 keV in a 5 mm3 sample shows great potential for use in gamma-ray spectroscopy applications. In this work, we report the state-of-the-art growth of high quality 25, 38, and 50 mm diameter KCa0.8Sr0.2I3:Eu2+ single crystals by the vertical self-seeding Bridgman method. KCa0.8Sr0.2I3:Eu2+ with a size of ∅25 mm × 25 mm can achieve excellent energy resolutions of 3.15% at 662 keV and 6.8% at 122 keV irradiation, which are superior to that of a commercial NaI:Tl+ of the same size. The nonuniformity of light collection and production in ∅25 mm × 25 mm and ∅38 mm × 38 mm KCa0.8Sr0.2I3:Eu2+ crystals was evaluated by using a technique based on a collimated 137Cs source and coupling the crystal to a photomultiplier tube (PMT) in different directions. The performances of the packaged crystals for practical use were also measured.
Molecular characteristics of liver acetyl CoA carboxylase. (1966)

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
A single-chip 5-V 2400-b/s modem (1990)

A single-chip split-band 2400-b/s modem has been implemented in a 3- mu m CMOS process. A high-level of integration results in a low-cost, high-performance modem. Single-ended analog switched-capacitor circuitry and an application-specific digital signal processor (DSP) combine to perform all modem signal processing. The transmit processing is performed almost entirely in the analog domain. The receiver is performed almost entirely in the analog domain. The IC also supports a number of lower-speed (<or=1200 b/s) split-band modem standards. The chip occupies 68.8 mm/sup 2/ and dissipates 120 mW while operating off a single 5-V supply. System and circuit aspects of the design are discussed, and the measured performance of the IC is summarized.<<ETX>>
Data-aided symbol timing and CFO synchronization for filter bank multicarrier systems (2009)

In this paper we consider the problem of data-aided joint symbol timing and carrier-frequency offset (CFO) estimation for filter bank-based multicarrier (FBMC) systems. As all multicarrier systems, FBMC systems are very sensitive to synchronization errors, since CFO and symbol timing errors cause interference between successive symbols and adjacent subcarriers which can lead to a severe performance degradation. Therefore, reliable and accurate synchronization algorithms must be designed for these systems. The approach herein presented is based on the deployment of appropriate training sequences. In particular, we propose a new joint symbol timing and CFO synchronization algorithm based on the least squares approach and exploiting the transmission of a training sequence made up of identical parts. The performance of the derived estimators, assessed by computer simulations, is compared with that of two data-aided synchronization algorithms previously proposed in the literature.
Design, Manufacture, and Characterization of Composites Using On-Line Recycled Thermoplastic Powder Impregnation of Fibers and In-Situ Filament Winding (1998)

Recycled thermoplastic powder impregnated composites using in-situ filament winding and on-line consolidation of fibers have been successfully manufactured with the modified filament winding setup constructed in this study. Reclaimed low density polyethylene (RLDPE), reclaimed low-density polyethylene with polymer additives consisting of 0.25% by weight of Cyasorb® UV-3346 Light Stabilizer, 0.25% by weight of Cyasorb® UV-53 1 Light Stabilizer, and 0.08% by weight of Cyanox® 2777 Antioxidant (RLDPE-PA), and virgin low-density polyethylene (LDPE) were pulverized to ultrafine powders ranging from 20 to 300,um, and utilized to impregnate a separated fiberglass tow. After initial experiments, two powder-impregnated composite tubes were manufactured for each thermoplastic material system. The composites were then tested for tensile (hoop) strength and compressive bending strength under the ASTM D2290-95 and C-ring tests, respectively. This study showed that while the RLDPE composite did not perform well, composite samples made with RLDPE and polymer additives (i.e.. RLDPE-PA) performed better than RLDPE samples but not as well as composites made of virgin LDPE. The impregnation and consolidation steps in the manufacturing process were also effective for all three systems. The composite tubes exhibited very low void contents and high fiber volume fractions, while unmelted and unconsolidated thermoplastic powders were not present in the manufactured parts. The absence of fiber waviness and fiber migration through the thickness of the composite demonstrates that the online consolidation of powder-impregnated fibers was also effective. The collection of the separated powder-impregnated fibers prior to filament winding also seemed to be sufficient.
Stroke survivor gait adaptation and performance after training on a Powered Ankle Foot Orthosis (2010)

With over 600 thousand people each year surviving a stroke, it has become the leading cause of serious long-term disability in the United States [1], [2]. The adverse financial and social conditions attributed to stroke have prompted researchers and entrepreneurs to explore the viability of rehabilitation robots. The Powered Ankle Foot Orthosis (PAFO) utilizes robotic tendon technology and supports motion with a single degree of freedom, ankle rotation in the Sagittal plane. Motion capture data, robot sensor data, and functional 6 minute walk data were collected on three stroke subjects. All subjects had some positive changes in their key gait variables while using the PAFO. These changes were more dramatic while harnessed and using a treadmill as opposed to walking over ground. Robot sensor data showed significant improvements on key variables for the three subjects. Motion capture data showed improvements in knee range of motion for subject 1, and the 6 minute walk data showed an increase in distance walked for subjects 1 and 3. Comfort, stability, and robustness proved to be critical design parameters for developing a gait therapy robot capable of collecting repeatable data with low variability.
Regal Power and the Rule of Law: a Tudor Paradox (1964)

Tudor statesmen, in their statutes and debates, and Tudor jurists, in reports and treatises, recorded their awareness of an antithesis between regal power and political law. Political action and juridical argument made them increasingly sensitive to an oppugnancy between executive authority and constitutional control. Medieval men of law, too, had noted this inconsonance in England's polity. Sir John Fortescue, while Henry VI's Chancellorin-exile in 1468, faced the dilemma; but he resolved it only verbally. He wrote: “regal power is restrained by political law.” Then he added, “such is the law of the Kingdom” of England. So facile a formula as Fortescue's might make nice theory, yet it was one easier to prescribe than to apply to a live monarch. The pragmatic Tudors, however, succeeded in surmounting the antithesis between political law and regal power, paradoxically, by augmenting both. To solve immediate political crises and to enhance the effectiveness of government, Privy Councilors and parliamentarians passed act after act that increased the King's prerogatives. At the same time, moreover, these very statutes afforced, by implication, the principles of political, or public, law. Kings and queens, judges and councilors, Lords and Commons during the sixteenth century formulated a concept of the rule of law and made it transcendant. By the 1590's they had accorded the rule of law statutory, judicial, and regal recognition. For the Tudor time-being, this principle served to balance regal power and political law and to give to this antinomy a congruity.
A compact wideband sierpinski antenna loaded with metamaterial (2016)

In this paper, an effort has been made to use the metamaterial structure in union with the Sierpinski fractal pedal antenna, which resonates at six different frequencies covering C, X, K and Ka bands. It is designed and simulated using Ansoft HFSS which is proposed for SHF (Super High Frequency) applications. Metamaterial used in design increases gain and efficiency of antenna systems, as 90 percent of the input signal is reflected back to the antenna design and Sierpinski fractal antenna provides multiband and high frequency. Antenna is etched on an FR4 epoxy substrate whose dielectric constant is 4.4. It radiates at 10 GHz, 21.7GHz, 24.5GHz, 25.8GHz and 29.6 GHz covering wide range of applications. The overall size of an antenna is 35 × 52 × 1.57 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> .
Non-parametric Dependent Components (2006)

Canonical correlation analysis (CCA) is equivalent to finding mutual information-maximizing projections for normally distributed data. We remove the restriction of normality by non-parametric estimation, and formulate the problem of finding dependent components with a connection to Bayes factors. The method is applied for characterizing yeast stress by finding what is in common in several different stress conditions.
Adaptive feature enhancement for mammographic images with wavelet multiresolution analysis (1997)

A novel and computationally efficient approach to an adaptive mammographic image feature enhancement using wavelet-based multiresolution analysis is presented. On wavelet decomposition applied to a given mammographic image, we integrate the information of the tree-structured zero crossings of wavelet coefficients and the information of the low-pass-filtered subimage to enhance the desired image features. A discrete wavelet transform with pyramidal structure is employed to speedup the computation for wavelet decomposition and reconstruction. The spatiofrequency localization property of the wavelet transform is exploited based on the spatial coherence of image and the principle of human psychovisual mechanism. Preliminary results show that the proposed approach is able to adaptively enhance local edge features, suppress noise, and improve global visualization of mammographic image features. This wavelet-based multiresolution analysis is therefore promising for computerized mass screening of mammograms.
Effect of a straight teeth-on-rotor labyrinth seal on rotordynamics (1991)

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.
Synthesis of Aspirin: A General Chemistry Experiment (1998)

An experiment is described that is suitable for the early portion of the laboratory in a general chemistry course and integrates organic examples. It is the two-step synthesis of aspirin starting from oil of wintergreen. The mechanism for this synthesis provides examples of three major classes of chemical reactions: hydrolysis, condensation, and proton transfer. To understand the chemistry, the student must be able to recognize the common molecular framework shared by oil of wintergreen, salicylic acid, and aspirin and to identify the -OH and -CO2 sites where chemical changes occur. The experiment differs in three ways from traditional aspirin synthesis experiments for general chemistry. It is designed to be performed early rather than late; it starts from a naturally occurring material and requires two steps rather than one; and it utilizes FTIR spectroscopy to distinguish among oil of wintergreen starting material, salicylic acid intermediate, and aspirin product. The use of FTIR spectroscopy introduces students to a modern analytical technique that is currently used in research involving aspirin.
ADAMTS13: a new link between thrombosis and inflammation (2008)

von Willebrand factor (VWF) levels are elevated and a disintegrin-like and metalloprotease with thrombospondin type I repeats-13 (ADAMTS13) activity is decreased in both acute and chronic inflammation. We hypothesized that by cleaving hyperactive ultralarge VWF (ULVWF) multimers, ADAMTS13 down-regulates both thrombosis and inflammation. Using intravital microscopy, we show that ADAMTS13 deficiency results in increased leukocyte rolling on unstimulated veins and increased leukocyte adhesion in inflamed veins. Both processes were dependent on the presence of VWF. Depletion of platelets in Adamts13(-/-) mice reduced leukocyte rolling, suggesting that platelet interaction with ULVWF contributes to this process. Increased levels of endothelial P-selectin and plasma VWF in Adamts13(-/-) compared with wild-type (WT) mice indicated an elevated release of Weibel-Palade bodies. ULVWF multimers released upon stimulation with histamine, a secretagogue of Weibel-Palade bodies, slowed down leukocyte rolling in Adamts13(-/-) but not in WT mice. Furthermore, in inflammatory models, ADAMTS13 deficiency resulted in enhanced extravasation of neutrophils, and this process was also dependent on VWF. Our findings reveal an important role for ADAMTS13 in preventing excessive spontaneous Weibel-Palade body secretion, and in the regulation of leukocyte adhesion and extravasation during inflammation.
The mycobacterial component of complete Freund's adjuvant induces expulsion of the intestinal nematode Trichinella spiralis in mice. (1996)

Expulsion of T. spiralis adult worms was accelerated in high-responder NIH mice vaccinated previously with complete Freund's adjuvant (CFA) emulsified in PBS, whereas the expulsion of this parasite from low-responder C57 BL/10 mice was unaffected. Incomplete Freund's adjuvant (IFA) did not induce protection and it was concluded that the mycobacterial component, present in CFA but absent from IFA, was responsible for inducing these non-specific protective effects. CFA did not induce T. spiralis-specific B- or T-cell responses, but high levels of IFN gamma from Con A-stimulated mesenteric lymph node cells of CFA-vaccinated NIH mice were detected. Such cytokine release was not produced by cells from the C57 BL/10 strain. It is therefore proposed that IFN gamma production is related to the mode of adjuvanticity and non-specific protective effects of CFA in this system.
Research of the current-injection-based P-type 12-pulse ATRU (2012)

P-type 12-pulse auto-transformer rectifier unit (ATRU) is a very attractive harmonic solution in aviation situation for its lower volt-ampere rating of transformer compared with other multi-pulse methods. However, the input current THD of 12-pulse ATRU is about 15% larger than 10% THD requirement by the related standards. Current-injection method is an effective harmonic mitigation method for 12-pulse rectifiers. This paper analyzed the input current waveform based on triangle current-injection method for P-type 12-pulse ATRU. It also points that the key to get the required injection current taking use of the voltage difference across interphase reactors is to emulate a resistor. The optimum equivalent current injection resistance is derived in this paper. And a novel harmonic injection scheme based on DCM flyback converter is proposed and analyzed. Experimental results from three 4kW P-type 12-pulse ATRU testify the effectiveness of the theoretical analysis and the proposed harmonic injection method.
<i>In Vivo</i> Imaging of Cerebral Microvascular Plasticity from Birth to Death (2012)

Cerebral function and viability are critically dependent on efficient delivery of oxygen and glucose through the microvasculature. Here, we studied individual microvessels in the intact brain using high-resolution confocal imaging and long-term time-lapse two-photon microscopy across the lifetime of a mouse. In the first postnatal month, we found large-scale sprouting but to our surprise the majority of sprouts underwent pruning and only a small fraction became perfused capillaries. After the first month, microvessel formation and elimination decreased and the net number of vessels stabilized. Although vascular stability was the hallmark of the adult brain, some vessel formation and elimination continued throughout life. In young adult mice, vessel formation was markedly increased after exposure to hypoxia; however, upon return to normoxia, no vessel elimination was observed, suggesting that new vessels constitute a long-term adaptive response to metabolic challenges. This plasticity was markedly reduced in older adults and aging where hypoxia-induced angiogenesis was absent. Our study describes, for the first time in vivo patterns of cerebral microvascular remodeling throughout life. Disruption of the observed balance between baseline turnover and vascular stability may underlie a variety of developmental and age-related degenerative neurological disorders.
Why TIPA Leads to an Increase in the Mechanical Properties of Mortars Whereas TEA Does Not (2003)

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Expression of apoptotic tumour necrosis factor receptor‐associated factor, caspase recruitment domain and cell death‐inducing DFF‐45 effector genes in therapy‐treated renal cell carcinoma (2008)

These newly identified RCC apoptosis genes have shown potential for improving outcome in other cancers and may prove to have the same potential in RCC with further study.
The National Foundation for Health, Physical Education, and Recreation (1971)

"The National Foundation for Health, Physical Education, and Recreation." Journal of Health, Physical Education, Recreation, 42(3), pp. 8–9
Age-associated decline in mitochondrial respiration and electron transport in <i>Drosophila melanogaster</i> (2005)

The principal objective of the present study was to identify specific alterations in mitochondrial respiratory functions during the aging process. Respiration rates and the activities of electron transport chain complexes were measured at various ages in mitochondria isolated from thoraces of the fruit fly, Drosophila melanogaster, which consist primarily of flight muscles. The rates of state 3 respiration (ADP-stimulated), RCRs (respiratory control ratios) and uncoupled respiration rates decreased significantly as a function of age, using either NAD+- or FAD-linked substrates; however, there were no differences in state 4 respiration (ADP-depleted) rates. There was also a significant age-related decline in the activity of cytochrome c oxidase (complex IV), but not of the other mitochondrial oxidoreductases examined. Exposure of mitochondria isolated from young flies to low doses of KCN or NaAz (sodium azide), complex IV inhibitors, decreased cytochrome c oxidase activity and increased the production of H2O2. Collectively, these results support the hypothesis that impairment of mitochondrial respiration may be a causal factor in the aging process, and that such impairment may result from and contribute to increased H2O2 production in vivo.
A guide to the synthesis of block copolymers using reversible-addition fragmentation chain transfer (RAFT) polymerization (2013)

The discovery of reversible-deactivation radical polymerization (RDRP) has provided an avenue for the synthesis of a vast array of polymers with a rich variety of functionality and architecture. The preparation of block copolymers has received significant focus in this burgeoning research field, due to their diverse properties and potential in a wide range of research environments. This tutorial review will address the important concepts behind the design and synthesis of block copolymers using reversible addition-fragmentation chain transfer (RAFT) polymerization. RAFT polymerization is arguably the most versatile of the RDRP methods due to its compatibility with a wide range of functional monomers and reaction media along with its relative ease of use. With an ever increasing array of researchers that possess a variety of backgrounds now turning to RDRP, and RAFT in particular, to prepare their required polymeric materials, it is pertinent to discuss the important points which enable the preparation of high purity functional block copolymers with targeted molar mass and narrow molar mass distribution using RAFT polymerization. The key principles of appropriate RAFT agent selection, the order of monomer addition in block synthesis and potential issues with maintaining high end-group fidelity are addressed. Additionally, techniques which allow block copolymers to be accessed using a combination of RAFT polymerization and complementary techniques are touched upon.
Cellularity of bovine adipose tissue (1973)

Subcutaneous and perirenal adipose tissue from bovine animals that had different fat deposition patterns were characterized in terms of the weight of the adipose tissue organ and adipose cell number and mean cell size as determined by electronic counting of osmium-fixed adipose cells. Similar parameters were also measured in the interfascicular adipose tissue dissected from four muscles. Adipose tissue from animals of the leaner Holstein breed contained smaller cells than the respective tissues from the fatter Hereford x Angus animals. The small subcutaneous deposit in the Holstein animals was due to a small number of adipose cells that were small in size. During growth of the bovine animal, an increase in adipose tissue mass was accompanied by cellular hypertrophy and hyperplasia. However, by 14 months of life hyperplasia was complete in all but the interfascicular adipose tissue. In the 14-month-old Hereford x Angus steers, interfascicular adipose tissue had an appreciable number of small cells and a bimodal distribution for cell diameter. The results of this study suggest that interfascicular adipose tissue is a late developing depot and that hyperplasia is still an active process in this depot at 14 months of life, whereas hyperplasia appears to be nearly complete in the subcutaneous and perirenal depots of bovine animals by about 8 months of life or shortly thereafter. Correlation coefficients indicated that intramuscular lipid content was positively related to the number of interfascicular adipose cells per 100 g of muscle in four different muscles. However, average cell diameter and volume were significantly correlated to intramuscular lipid content in only one of the four muscles studied.
Securing Time-Synchronization Protocols in Sensor Networks: Attack Detection and Self-Healing (2008)

There have been many time synchronization protocols proposed for sensor networks. However, the security problems related to time synchronization have not been fully solved yet. If malicious entities manipulate time synchronization, failures of many functionalities in the sensor networks would occur. In this paper, we identify various attacks against time synchronization and then develop a detection and self-healing scheme to defeat those attacks. The proposed scheme has three phases: (1) abnormality detection performed by individual sensors, (2) trust- based malicious node detection performed by the base station, and (3) self-healing through changing the topology of synchronization tree. Simulations are performed to demonstrate the effectiveness of the proposed scheme as well as the implementation overhead.