gebhart/patrepeval huggingface dataset:
Reducing Power Consumption with Relaxed Quasi Delay-Insensitive Circuits (2009)

This paper introduces novel circuits to mitigate power consumption in asynchronous logic. By exposing a preexisting timing assumption in quasi-delay insensitive (QDI) circuits, we develop a set of circuit templates that reduce dynamic power consumption while maintaining the robustness of QDI circuits. We refer to these as relaxed quasi delay-insensitive circuits (RQDI). Power consumption is reduced in four ways. First, we present a circuit template that saves power by reducing the logic required to generate enable/acknowledge signals. Second, we develop voltage converters for asynchronous channels that allow non-performance critical components to be moved to lower voltage domains. Third, we propose a circuit template that improves upon the use of multiple voltage domains by keeping the data logic in the high voltage domain, but moves the enable/acknowledge logic to the low voltage domain. Fourth, we utilize a novel 2-phase buffer to half the switching in global routing and static switching networks. Experiments show that we can reduce energy by 30-50%, with a minimal impact on area and performance.
Dynamic Forces From Single Gland Labyrinth Seals: Part I — Ideal and Viscous Decomposition (1993)

A theoretical and experimental investigation on the aerodynamic forces generated by a single gland labyrinth seal executing a spinning/whirling motion has been conducted. A lumped parameter model which includes the kinetic energy carry-over effect is presented along with a linear perturbation solution technique. The resulting system is nondimensionalized and the physical significance of the reduced parameters is discussed. Closed form algebraic formulas are given for some simple limiting cases. It is shown that the total cross-force predicted by this model can be represented as the sum of an ideal component due to an inviscid flow with entry swirl and a viscous part due to the change in swirl created by friction inside the gland. The frequency dependent ideal part is solely responsible for the rotordynamic direct damping. The facility designed and built to measure these frequency dependent forces is described. Experimental data confirm the validity and usefulness of this ideal/viscous decomposition. A method for calculating the damping coefficients based on the force decomposition using the static measurements only is presented.
Errors (1976)

An exact analysis and classification of the error types that can appear in a system is of central importance to the development of reliable systems. After such an analysis and classification it is possible to introduce measures which either reduce the likelihood of certain classes of error, or minimise the effects of such errors should they appear.
Measurement of lower-leg volume change by quantitative computed tomography (2008)

Computed tomography can be used as a precise quantitative method to measure small volume changes of the lower leg as a whole, and separately for muscle and adipose tissue. The results were obtained with a negligible effective dose, lower than that delivered by modern fan-beam dual-energy X-ray absorptiometry whole-body examinations and equal to a few hours of background radiation.
Visualization support for user-centered model selection in knowledge discovery in databases (2002)

The process of knowledge discovery in databases inherently consists of several steps that are necessarily iterative and interactive. In each application, to go through this process the user has to exploit different algorithms and their settings that usually yield different discovered models. The selection of appropriate discovered models or algorithms to achieve such models, referred to as model selection-requires meta-knowledge on algorithm/model and model performance metrics - is generally a difficult task for the user. Taking account of this difficulty, we consider that the ease of model selection is crucial in the success of real-life knowledge discovery activities. Different from most related work that aims to an automatic model selection, in our view model selection should be a semiautomatic work requiring an effective collaboration between the user and the discovery system. For such a collaboration, our solution is to give the user the ability to try easily various alternatives and to compare competing models quantitatively by performance metrics, and qualitatively by effective visualization. This paper presents our research on such model selection and visualization in the development of a knowledge discovery system called D2MS.
Theoretical study of the characteristics of a continuous wave iron-doped ZnSe laser (2018)

A theoretical model describing the dynamic process of a continuous-wave Fe2+:ZnSe laser is presented. The influence of some of the operating parameters on the output characteristics of an Fe2+:ZnSe laser is studied in detail. The results indicate that the temperature rise of the Fe2+:ZnSe crystal is significant with the use of a high power pump laser, especially for a high doped concentration of crystal. The optimal crystal length increases with decreasing the doped concentration of crystal, so an Fe2+:ZnSe crystal with simultaneous doping during growth is an attractive choice, which usually has a low doped concentration and long length. The laser pumping threshold is almost stable at low temperatures, but increases exponentially with a working temperature in the range of 180 K to room temperature. The main reason for this phenomenon is the short upper level lifetime and serious thermal temperature rise when the working temperature is higher than 180 K. The calculated optimum output mirror transmittance is about 35% and the performance of a continuous-wave Fe2+:ZnSe laser is more efficient at a lower operating temperature.
SUAS: A Novel Soft Underwater Artificial Skin with Capacitive Transducers and Hyperelastic Membrane (2018)

Summary The paper presents physical modeling, design, simulations, and experimentation on a novel Soft Underwater Artificial Skin (SUAS) used as tactile sensor. The SUAS functions as an electrostatic capacitive sensor, and it is composed of a hyperelastic membrane used as external cover and oil inside it used to compensate the marine pressure. Simulation has been performed studying and modeling the behavior of the external interface of the SUAS in contact with external concentrated loads in marine environment. Experiments on the external and internal components of the SUAS have been done using two different conductive layers in oil. A first prototype has been realized using a 3D printer. The results of the paper underline how the soft materials permit better adhesion of the conductive layer to the transducers of the SUAS obtaining higher capacitance. The results here presented confirmed the first hypotheses presented in a last work and opened new ways in the large-scale underwater tactile sensor design and development. The investigations are performed in collaboration with a national Italian project named MARIS, regarding the possible extension to the underwater field of the technologies developed within the European project ROBOSKIN.
Effect of reaction environment and in situ formation of the precursor on the composition and shape of iron oxide nanoparticles synthesized by the thermal decomposition method (2018)

In this work, we investigate the effect of the reaction environment and the <italic>in situ</italic> formation of an iron precursor on the synthesis of iron oxide nanoparticles (IONPs) through thermal decomposition.
Retinopathy in Galactosemic Dogs Continues to Progress After Cessation of Galactosemia (1995)

The fact that retinopathy did not halt promptly at intervention is consistent with previous data from diabetic dogs and suggests that the vascular lesions may be due to sequelae of excessive tissue aldohexose that are not promptly corrected by correction of the aldohexose level.
Elaboration and refinement of a motivational communication training program for healthcare professionals in pediatric oncology: a feasibility and acceptability study (2021)

The training <i>Motivation Cafés</i> is now ready to be pilot tested in pediatric cancer care centers.
Trimethylamine and Organic Matter Additions Reverse Substrate Limitation Effects on the δ 13 C Values of Methane Produced in Hypersaline Microbial Mats (2014)

Methane production has been observed in a number of hypersaline environments, and it is generally thought that this methane is produced through the use of noncompetitive substrates, such as the methylamines, dimethylsulfide and methanol. Stable isotope measurements of the produced methane have also suggested that the methanogens are operating under conditions of substrate limitation. Here, substrate limitation in gypsum-hosted endoevaporite and soft-mat hypersaline environments was investigated by the addition of trimethylamine, a noncompetitive substrate for methanogenesis, and dried microbial mat, a source of natural organic matter. The δ(13)C values of the methane produced after amendments were compared to those in unamended control vials. At all hypersaline sites investigated, the δ(13)C values of the methane produced in the amended vials were statistically lower (by 10 to 71‰) than the unamended controls, supporting the hypothesis of substrate limitation at these sites. When substrates were added to the incubation vials, the methanogens within the vials fractionated carbon isotopes to a greater degree, resulting in the production of more (13)C-depleted methane. Trimethylamine-amended samples produced lower methane δ(13)C values than the mat-amended samples. This difference in the δ(13)C values between the two types of amendments could be due to differences in isotope fractionation associated with the dominant methane production pathway (or substrate used) within the vials, with trimethylamine being the main substrate used in the trimethylamine-amended vials. It is hypothesized that increased natural organic matter in the mat-amended vials would increase fermentation rates, leading to higher H2 concentrations and increased CO2/H2 methanogenesis.
Neurology Was There: 1929 (2000)

Our website uses cookies to enhance your experience. By continuing to use our site, or clicking "Continue," you are agreeing to our Cookie Policy | Continue JAMA Neurology HomeNew OnlineCurrent IssueFor Authors Podcast Publications JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry (1919-1959) JN Learning / CMESubscribeJobsInstitutions / LibrariansReprints & Permissions Terms of Use | Privacy Policy | Accessibility Statement 2023 American Medical Association. All Rights Reserved Search All JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Forum Archive JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry Input Search Term Sign In Individual Sign In Sign inCreate an Account Access through your institution Sign In Purchase Options: Buy this article Rent this article Subscribe to the JAMA Neurology journal
F61. TRIVIAL TRANSITIONS? SIPS-DEFINED CONVERSIONS TO PSYCHOSIS: ONE YEAR OUTCOME (2019)

Although the clinical high risk (CHR) for psychosis paradigm has become well-established over the past two decades, one key component has received surprisingly little direct investigative attention: the validity of the conversion to psychosis or transition criteria. This lack of evidence is surprising because many CHR treatment and prediction studies rely on the conversion measure as an outcome. In the absence of such evidence, some observers have raised the possibility that conversions from CHR may be trivial. The aim of this study is to evaluate the predictive validity of the transition to psychosis as measured by the Structured Interview for Psychosis-Risk Syndromes (SIPS) in CHR individuals. To our knowledge, this is the first study to examine the CHR conversion to psychosis at one-year follow-up. It is hypothesized that CHR participants whose conversion to frank psychosis was ascertained by SIPS (SIPS CV) will show similar diagnostic stability and severity of illness compared to the FEP sample and will differ significantly from SIPS Non-Converters (NCV) on clinical severity. Participants included 33 SIPS Converters (CV) (met criteria for conversion to frank psychosis (COPS) on SIPS) and 399 CHR NCV both from the North American Prodromal Longitudinal Study (NAPLS 2), as well as a sample of 67 separately-ascertained first-episode psychosis (FEP) patients from the STEP Coordinated Specialty Care (CSC) program in New Haven, CT. Comparisons using Chi-square and ANOVA were made at baseline and one-year follow-up on variables from demographic, diagnostic stability (SCID) and available measurement domains relating to severity of illness (psychotropic medication and resource utilization). The principal findings of the present study are: 1) large majority of cases in both SIPS CV (n=27/33, 81.8%) and FEP (n=57/67, 85.1%) samples continued to have current psychosis diagnoses at one year follow up, 2) exposure to antipsychotic medication was higher in SIPS CVs (n=17/32, 53.1%) compared to SIPS NCVs (n=81/397, 20.4%), and similar as compared to FEP cases (n=39/65, 60%), 3) at follow up, SIPS CV had higher rates of resource utilization (any psychiatric hospitalizations, day hospital admissions, and ER visits) than SIPS-NCV and were similar to FEP in most categories. The results suggest that the SIPS definition of psychosis onset carries substantial validity in that those with SIPS-defined psychosis demonstrate similar diagnostic stability and severity of illness at one-year follow as a first episode sample and greater severity of illness as compared to a SIPS-defined CHR con-converting sample. Limitations include the lack of functional assessments at follow-up in the SIPS-CV. Additional studies are needed to further validate the CHR vs transition to psychosis distinction. Since many patients who come to baseline evaluation for CHR are discovered to have previously unrecognized frank psychosis, future studies should aim to obtain additional evidence by following this important group.
Applications of Kalman Filtering in Aerospace 1960 to the Present [Historical Perspectives] (2010)

In the 1960s, the Kalman filter was applied to navigation for the Apollo Project, which required estimates of the trajectories of manned spacecraft going to the Moon and back. With the lives of the astronauts at stake, it was essential that the Kalman filter be proven effective and reliable before it could be used. This article is about the lead up to Kalman's work, key discoveries in the development and maturation of the filter, a sampling of its many applications in aerospace, and recognition of some who played key roles in that history.
Hemoglobin oxidative stress in cancer. (1996)

The role played by free radicals in carcinogenesis and their relationships with antioxidant pool and cancer have already been shown. Free radicals induce increased membrane permeability through membrane lipid peroxidation, protein oxidation and histamine release from mast cells. Free radicals also cause oxyhemoglobin oxidative stress which increases methemoglobin and hemichromes. For this reason, we studied the in vitro formation of methemoglobin at 0' and 90', dosed following the HPLC method, after oxidative stress of blood by means of acetylphenylhydrazine in 40 subjects with cancer and 40 healthy donors. The results showed that methemoglobin formation was highly significant in tumors as compared to controls (P < 0.0001). The statistical analyses we carried out showed that metHb formation is not affected by age, sex, smoking habit, red blood cell number, Hb, Ht or tumor staging. This makes us believe that free radicals alter erythrocyte membrane permeability and predenaturate oxyhemoglobin so that erythrocyte membrane becomes more susceptible to new oxidative stress. This caused the abnormal response we found. Our results clearly underline the role played by free radicals in tumorous disease and provide a successful and easy method to detect early, even in a pre-clinical stage, the presence of tumorous alterations in the human body.
Constructing Penrose-like tilings from a single prototile and the implications for quasicrystals (1997)

We present two sets of rules for constructing quasiperiodic tilings that suggest a simpler structural model of quasicrystals and a more plausible explanation of why quasicrystals form. First, we show that quasiperiodic tilings can be constructed from a single prototile with matching rules which constrain the way that neighbors can overlap. Second, we show that maximizing the density of a certain cluster of fat and thin tiles can force a Penrose tiling without imposing the usual Penrose matching rules.
Impact of linear power amplifier efficiency on capacity of OFDM systems with clipping (2008)

Capacity of clipped OFDM systems is analyzed. In contradistinction to previous work, we take into account intrinsic properties of the linear power amplifier efficiency - the dependence of power efficiency on clipping ratio. The following tradeoff emerges: a low clipping ratio causes signal distortion and decreases capacity. However, it also increases the efficiency of the power amplifier, which increases capacity. We resolve this tradeoff by evaluating the optimal clipping ratio for achieving maximal capacity. We show that increasing the clipping ratio does not necessarily result in higher capacity. Instead there exists an optimal clipping ratio for given channel SNR. Increasing the clipping ratio beyond optimal significantly reduces capacity.
Adaptive Channel Shortening Equalization For Coherent OFDM Doubly Selective Channels (2006)

In this work we propose a new adaptive channel shortening technique for doubly selective (time-varying frequency-selective) Orthogonal Frequency Division Multiplexing (OFDM) channels. OFDM is considered to be a very bandwidth efficient wireless transmission technique (due to its tightly packed orthogonal subcarrier structure) for multi-path channels. Transmissions in multipath channels exhibiting long delay spread channels, however, require an excessively long cyclic prefix (CP) to prevent inter-symbol interference (ISI) with OFDM, and thus undesirably reduce the bandwidth and power efficiency of the information transmission. Channel shortening equalization (CSE) is used to shorten the channel delay spread to a certain length (less than the CP length) so that ISI is minimized. Our technique adapts to channel variation and provides a significant bit error rate (BER) improvement in performance over non-adaptive techniques. We show that the adaptive technique improves the demodulated BER by greater than a factor of 10, with diversity order 1, in a mobile long delay spread (frequency-selective) channel, while the non-adaptive method exhibits a BER floor at 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup>
Quiescent epithelial cell rests of Malassez can differentiate into ameloblast‐like cells (2008)

Epithelial cell rests of Malassez (ERM) are quiescent epithelial remnants of Hertwig's epithelial root sheath (HERS) that are involved in the formation of tooth roots. After completion of crown formation, HERS are converted from cervical loop cells, which have the potential to generate enamel for tooth crown formation. Cervical loop cells have the potential to differentiate into ameloblasts. Generally, no new ameloblasts can be generated from HERS, however this study demonstrated that subcultured ERM can differentiate into ameloblast-like cells and generate enamel-like tissues in combination with dental pulp cells at the crown formation stage. Porcine ERM were obtained from periodontal ligament tissue by explant culture and were subcultured with non-serum medium. Thereafter, subcultured ERM were expanded on 3T3-J2 feeder cell layers until the tenth passage. The in vitro mRNA expression pattern of the subcultured ERM after four passages was found to be different from that of enamel organ epithelial cells and oral gingival epithelial cells after the fourth passage using the same expansion technique. When subcultured ERM were combined with subcultured dental pulp cells, ERM expressed cytokeratin14 and amelogenin proteins in vitro. In addition, subcultured ERM combined with primary dental pulp cells seeded onto scaffolds showed enamel-like tissues at 8 weeks post-transplantation. Moreover, positive staining for amelogenin was observed in the enamel-like tissues, indicating the presence of well-developed ameloblasts in the implants. These results suggest that ERM can differentiate into ameloblast-like cells.
System-level performance of mmWave cellular networks for urban micro environments (2017)

In this paper, we investigate the propagation coupling loss (captures all sources of attenuation between serving cell and mobile station (MS)) and geometry metric (GM) (downlink average signal-to-interference plus noise ratio) performance of mmWave cellular networks for outdoor and indoor MSs, considering urban micro (UMi) environments. Based on these studies, we identify effective mmWave frequency bands for cellular communication. We consider 3GPP compliant system-level simulations with two power allocation schemes: 1) transmit power scaled with communication bandwidth, and 2) constant total transmit power. Simulation results show that with scaled transmit power allocation, GM performance degradation is small: 20% of MSs experience GM less than 0 dB at all mmWave frequencies considered, for outdoor MSs. With constant Tx power allocation, 20% of MSs experience GM less than 0 dB for frequencies up to 30 GHz. Furthermore, 35% (48%) of outdoor MSs experience GM performance less than 0 dB at 60 GHz (100 GHz). On the other hand, for indoor MSs, even with scaled Tx power allocation, favorable GM performance is observed only at low frequencies, i.e., 2 GHz.
Enhanced sympathetic outflow and decreased baroreflex sensitivity are associated with intermittent hypoxia-induced systemic hypertension in conscious rats (2006)

Long-term exposure to intermittent hypoxia (IH), such as that occurring in association with sleep apnea, may result in systemic hypertension; however, the time course changes in arterial pressure, autonomic functions, and baroreflex sensitivity are still unclear. We investigated the changes in cardiovascular neural regulations during the development of chronic IH-induced hypertension in rats. Sprague-Dawley rats were exposed to repetitive 1.25-min cycles (30 s of N2+45 s of 21% O2) of IH or room air (RA) for 6 h/day during light phase (10 AM-4 PM) for 30 days. Arterial pressure was measured daily using the telemetry system during RA breathing. The mean arterial pressure (MAP) and interpulse interval (PPI) signals were then used to assess the autonomic functions and spontaneous baroreflex sensitivity by auto- and cross-spectral analysis, respectively. Stable MAP, low-frequency power of MAP (BLF), and low-frequency power (LF)-to-high frequency power (HF) ratio of PPI (LF/HF) were significantly higher in IH-exposed rats, compared with those of RA-exposed rats. Elevation of the MAP, BLF, LF/HF, and minute ventilation started 5 days after IH exposure and lasted until the end of the 30-day observation period. Additionally, IH-exposed rats had significant lower slope of MAP-PPI linear regression (under a successively descending and ascending) and magnitude of MAP-PPI transfer function (at frequency ranges of 0.06-0.6 Hz or 0.6-2.4 Hz) after IH exposure for 17 days. However, RA-exposed rats did not exhibit these changes. The results of this study indicate that chronic IH-induced hypertension is associated with a facilitation of cardiovascular sympathetic outflow and inhibition of baroreflex sensitivity in conscious rats.