gebhart/patrepeval huggingface dataset:
Information-guided randomization for wireless physical layer secure transmission (2012)

Security capacity improvement is always the implementation goal of physical layer security, which can be achieved by deliberate randomization based on differentia and uniqueness of wireless channels through signal processing method. An information-guided randomization secure transmission scheme is proposed combined with a spatial modulation system in which information can be carried by receiving antennas index but actually by channel differentia. Randomization is generated along with channel modulation procedure realized by corresponding preprocessing to transmitting signals. We provide three approaches for designing preprocessing weights under different constraint conditions. The former two can only be used when the number of receiving antennas is less than transmitting and have a tradeoff with varying degrees between receiving performance and security. The third one then relaxes the limits via generalized spatial modulation and can be used for arbitrary antennas configuration but with a receiving performance compromise. Lastly, results of performance analysis and numerical evaluation show that the proposed secure scheme is effective to prohibit the eavesdropper from intercepting information.
Fabrication of V-grooved inner stripe GaAs-AlGaAs quantum-wire lasers (1997)

V-grooved inner stripe (VIS) GaAs-AlGaAs quantum-wire (QWR) lasers were successfully fabricated by, combining two-step metalorganic chemical vapor deposition (MOCVD) growth with a wet-etching technique. In order to achieve low threshold current density and high reliability, a conductive stripe width (W), a thickness (t/sub p-CBL/), and a doping concentration (n/sub p-CBL/) of the p-GaAs current-blocking layer (CBL) were determined to be W=1.2 μm, t/sub p-CBL/=2 μm, and n/sub p-CBL/=1×10/sup 18/ cm/sup -3/. The leakage currents passing through the CBL were also estimated using a modified P-SPICE. Thus far, a threshold current of 45 mA and an output power of 4 mW at 51 mA have been achieved under room-temperature pulsed operation for some devices with uncoated facets.
Combustion Characteristics of Minco Sub-bituminous Coal at Oxy-Fuel Conditions (2009)

New way to effectively capture in coal fired power plant is the combustion of coal using oxy-fuel technology. Combustion characteristics of Minco sub-bituminous coal at oxy-fuel conditions using TGA and drop tube furnace (DTF) were included activation energy about the char burnout, volatile yield and combustion efficiency of raw coal, the porosity of pyrolyzed char and fusion temperature of by-product ash. TGA result shows that the effect of on combustion kinetics reduces activation energy by approximately 7 kJ/mol at air oxygen level(21% ) and decreases the burning time by approximately 16%. The results from DTF indicated similar combustion efficiency under and atmospheres for equivalent concentration whereas high combustion efficiency under than was obtained for high temperature of more than . Overall coal burning rate under is decreased due to the lower rate of oxygen diffusion into coal surface through the rich boundary layer. By-product ash produced under and was similar IDT in irrelevant to concentration and atmospheres gas during the coal combustion.
When Allogeneic Mouse Spleen Cells Are Mixed in Vitro the T‐Cells Secrete a Product Which Guides the Maturation of B‐Cells (1972)

Allogeneic mouse spleen cells of strong hlstocompatibility difference mixed in vitro at equal proportions are unable to make a primary antibody response against thymus‐dependent as well as thymus‐independent antigens. This non‐responsiveness is not due to mutual cytotoxicity, because the reactivity of the cell partners can be recovered if the mixtures are transferred to irradiated hosts isoimmune to one of the cell partners. Responsiveness of allogeneic cell mixtures depends on the proportions at which the allogeneic cells are mixed, the strength of histocompatibility differences, the functional state of the ad mixed cells, the timing of the admixture, and the T/B cell ratio of the ad mixed cells. Supernatants from cultured allogeneic spleen cell mixtures can restore responsiveness of otherwise non‐responsive B‐spleen cells. The results suggest that interaction between cultured allogeneic T‐cells leads to rapid formation of soluble material which, depending on concentration, can either initiate or inhibit the maturation of B‐cells into antibody‐secreting cells in the presence of specific antigen.
Automated three-dimensional tracking of living cells by digital holographic microscopy (2009)

Digital holographic microscopy (DHM) enables a quantitative multifocus phase contrast imaging that has been found suitable for technical inspection and quantitative live cell imaging. The combination of DHM with fast and robust autofocus algorithms enables subsequent automated focus realignment by numerical propagation of the digital holographically reconstructed object wave. In combination with a calibrated optical imaging system, the obtained propagation data quantify axial displacements of the investigated sample. The evaluation of quantitative DHM phase contrast images also enables an effective determination of lateral cell displacements. Thus, 3-D displacement data are provided. Results from investigations on sedimenting red blood cells and HT-1080 fibrosarcoma cells in a collagen tissue model demonstrate that DHM enables marker-free automated quantitative dynamic 3-D cell tracking without mechanical focus adjustment.
Portable telephones for cellular systems (1980)

A portable radiotelephone suitable for operation in 800 MHz cellular systems and compatible with the developmental systems proposed by Bell Laboratories and Motorola has been developed. The size, weight and power drain goals in critical transceiver portions were achieved by the use of custom integrated circuits packaged in hybrid modules. The partitioning of the microprocessor based logic unit into custom CMOS chips and test results for the data acquisition system are presented. Design and human engineering factors are discussed.
Synthesis of optically active 2,3-epoxycyclohexanone and the determination of its absolute configuration (1980)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of optically active 2,3-epoxycyclohexanone and the determination of its absolute configurationHans Wynberg and Bea MarsmanCite this: J. Org. Chem. 1980, 45, 1, 158–161Publication Date (Print):January 1, 1980Publication History Published online1 May 2002Published inissue 1 January 1980https://pubs.acs.org/doi/10.1021/jo01289a031https://doi.org/10.1021/jo01289a031research-articleACS PublicationsRequest reuse permissionsArticle Views773Altmetric-Citations100LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Community Learning Day 2016 (2016)

On August 25, 1986 the charter faculty and staff met for the first time at IMSA. Imagine the scene: No students. No specific curriculum, nor SSL's. No history. Never had a Community Learning Day! No nothing! Only a promise that we would be better than the alternative. Let’s take a moment right now to share with 2/3 persons sitting near you about what might have been going through your mind and heart if you had been here on that first Community Learning Day in 1986—a little time travel! Today, we are gathered for our 30th Community Learning Day! Welcome to our 30th year!
Corticotropin-Releasing Factor Receptors and Pituitary Adrenal Responses during Immobilization Stress (1988)

The regulation of pituitary and brain CRF receptors and corticotroph responses during stress were studied in rats subjected to prolonged immobilization. Plasma ACTH levels showed the characteristic biphasic changes, with a rapid 23-fold increase in 15 min, followed by a decrease to about twice the basal levels after 6-h immobilization. In contrast, plasma corticosterone levels were markedly elevated throughout the duration of the stress. Pituitary CRF receptor content, measured by binding of [125I]Tyr-ovine CRF to pituitary membrane-rich fractions, was unchanged after 2.5 h, but was reduced by 28 +/- 2.7% (+/- SE) and 47.6 +/- 1.1% after 18 and 48 h of immobilization, respectively. These results were confirmed by autoradiography in slide-mounted frozen pituitary sections. In contrast, no changes in CRF receptor content were observed in brain areas, including olfactory bulb, frontoparietal cortex, hippocampus, amygdala, and lateral septum. A concomitant decrease in immunoreactive (ir) CRF content in the median eminence of rats immobilized for 48 h is consistent with the hypothesis that increased release of CRF into the portal circulation occurs during chronic stress. Despite pituitary CRF receptor loss and reduced in vitro responses to CRF, the increases in plasma ACTH and corticosterone in vivo after ether exposure or CRF injection were greater and more prolonged in rats immobilized for 48 h than in nonimmobilized controls. The decrease in pituitary CRF receptors was accompanied by decreased CRF-stimulated cAMP and ACTH release in cultured pituitary cells from 48-h restrained rats. However, concomitant incubation of cells with CRF and vasopressin restored cAMP and ACTH responses to control levels, suggesting that the simultaneous release of both regulators from the hypothalamus determines the plasma ACTH level. These findings indicate that the decrease in plasma ACTH during the adaptation phase to stress is accompanied by decreases in pituitary CRF receptors. However, the enhanced pituitary response to a superimposed stress or CRF injection implies that the decrease in plasma ACTH levels during prolonged stress may be due to adaptive changes at the central level. These findings emphasize the importance of the integrated actions of CRF and other regulators in the control of the pituitary adrenal-axis during stress.
Smartphone-Compatible Ultrasound Probe (2014)

Smartphones are one of the most widely used cell phones in the United States today. They perform multiple functions, and in April 2009, another capability was added to that list. Smartphones are now able to display sonographic images of the human body and organs through use of a smartphone-compatible ultrasound probe. The probe can be plugged into the USB slot of a smartphone and used to allow gray-scale image visualization. This article discusses the function and structure of this new and emerging technology while looking at the impact of this technology on the field of sonography.
Nitrovasodilators, Low-Dose Aspirin, Other Nonsteroidal Antiinflammatory Drugs, and the Risk of Upper Gastrointestinal Bleeding (2000)

The use of nitrovasodilator drugs is independently associated with a decreased risk of upper gastrointestinal bleeding.
Immunologic Interference from Sequential Administration of Live Attenuated Alphavirus Vaccines (1998)

Two different human vaccine trials examined interference arising from sequential administration of vaccines against heterologous alphaviruses. The first trial indicated that persons previously vaccinated against Venezuelan equine encephalitis virus (VEEV) exhibited poor neutralizing antibody responses to a live attenuated chikungunya virus (CHIKV) vaccine (46% response rate). The second trial prospectively examined neutralizing antibody responses to live attenuated VEEV vaccine in persons previously inoculated with either CHIKV vaccine or placebo. Following seroconversion to CHIKV, CHIKV vaccine recipients' geometric mean titers (GMTs) to VEEV by 80% plaque-reduction neutralization titration never exceeded 10, compared with a peak GMT of 95 after VEEV vaccination for alphavirus-naive volunteers who initially received placebo (P < .003). ELISA antibody responses demonstrated cross-reactive IgG to VEEV after primary CHIKV immunization and then an anamnestic response upon subsequent VEEV vaccination. These data indicate that preexisting alphavirus immunity in humans interferes with subsequent neutralizing antibody response to a live attenuated, heterologous vaccine.
Discrete pulse modulation strategies for high-frequency inverter systems (1993)

High-performance, high-frequency inverter systems for UPS (uninterruptible power system) applications cannot be easily realized using conventional hard-switched PWM inverter topologies. Adoption of typical soft-switched inverters such as the resonant DC link inverter, require the use of discrete pulse modulation strategies. New controller structures are necessary to cope with stringent voltage regulation and distortion constraints in the presence of unbalanced and nonlinear loads. A controller that utilizes a load current feedforward strategy with a cost function current regulator to achieve excellent transient performance characteristics is presented. Voltage regulation is ensured using a synchronous frame regulator. Detailed simulation and experimental results verifying the concepts are presented. Although this work focuses on soft-switching inverters, the control concepts can be applied to conventional hard-switching inverters as well.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Measurement and Analysis of Plasma Arc Cutting Acoustic Signal (2004)

Plasma arc cutting sound has close relation with cutting conditions, so it contains useful information about this cutting process. In order to analyze the relationship between the plasma arc cutting acoustic signal and cut quality (including top and bottom kerf widths, bevel angle and dross attached level), a number of experiments under various cutting speeds have been carried out. It is shown that SPL (sound pressure level) of cutting acoustic signal shows mountain-shaped distribution with an increase of bottom kerf width. Experimental results also suggest the possibility to make an acoustic-based quality monitoring system for plasma arc cutting process.
STUDIES ON HUMAN SERUM PROTEINS (1941)

All hydrogen ion concentrations were determined electrometrically with a glass electrode.
Image Features As Virtual Beacons For Local Navigation (1989)

A technique for dynamic position correction using image features as virtual beacons is described. An algorithm which acquires new features, computes robot position correction vectors from tracked features, and maintains feature reliability statistics is detailed. The algorithm minimizes the use of matching to reduce computational expense and increase robustness. The principal inputs to the algorithm are the relative bearings observed between feature pairs. Unlike stereo-vision techniques it does not compute explicit feature range estimates. Unlike the bulk of vision based navigation methods, an accurate position estimate results from the integration of a large number of correction vectors derived from the low level analysis of many images. A control architecture for an autonomous mobile robot which makes use of this positioning technique is discussed. The general navigation problem of positioning, model building, path finding, and path execution is decomposed into local and global navigation. Local navigation is independent of high level representations, it is concerned with the immediately perceivable environment and deals with the bulk of the real-time constraints. Methods for coupling local and global navigation are explored. Simulation results showing the behavior of such a control system are presented. The motivation behind this research is the belief that a substantial subset of the navigation problem can be solved using only information obtained during early vision processing. This technique is expected to be more computationally tractable than methods based on optical flow field determination and more accurate than landmark based navigation methods.
Improved on/off temporally differentiating address-event imager (2005)

We have fabricated an improved version of an imager reported earlier (Kramer, J., Int. Symp. Circuits and Systems, vol.II, p.165-8, 2002), primarily by using a better pixel circuit and better layout principles. The new imager functions over 5 decades of background illumination and has much more symmetrical ON and OFF responses. This imager achieves massive redundancy reduction by temporally differentiating the image contrast. The ideal functions of the pixels are to compute the rectified derivatives /sup d///sub dt/(log I) = (dI/dt)/I, where I is the photocurrent in the pixel. The values of these derivatives are rectified and output as rate-coded events on the AER (address-event representation) bus. The 2.2 mm by 2.2 mm, chip was built in a 0.35 /spl mu/m 4M 2P CMOS process. The pixels are 40 /spl mu/m by 40 /spl mu/m and the array has 32 by 32 pixels, each with ON and OFF outputs. System power consumption is about 30 mA at 3.3 V.
Macrophage-mediated 15-lipoxygenase expression protects against atherosclerosis development. (1996)

Oxidative modification of LDL increases its atherogenicity, and 15-lipoxygenase (15-LO) has been implicated in the process. To address this issue, we generated transgenic rabbits that expressed 15-LO in a macrophage-specific manner and studied their susceptibility to atherosclerosis development when they were fed a high-fat, high-cholesterol (HFHC) diet (Teklad 0533 rabbit diet 7009 with 10% corn oil and 0.25% cholesterol) for 13.5 wk. Transgenic and nontransgenic rabbits developed similar degrees of hypercholesterolemia and had similar levels of triglyceride, VLDL, LDL, and HDL. Quantitative morphometric analysis of the aortic atherosclerosis indicated that the transgenic animals (n = 19) had significantly smaller lesion areas (9.8+/-6.5%, mean+/-SD) than their littermate controls (n = 14, 17.8+/-15.0%) (P < 0.05). In a subgroup (n = 9) of transgenic rabbits that received the HFHC diet plus the antioxidant N',N '-diphenyl-phenylenediamine (1%), the extent of lesion involvement (9.8+/-7.5%) did not differ from the subgroup (n = 10) that received the regular HFHC diet (9.7+/-5.9%). Since the results were unexpected, we repeated the experiments. Again, we found that the nontransgenic littermates (n = 12) had more extensive lesions (11.6+/-10.6%) than the transgenic rabbits (n = 13; 9.5+/-7.8%), although the difference was not significant. In a third set of experiments, we crossed 15-LO transgenic rabbits with Watanabe heritable hyperlipidemic (WHHL) rabbits and found that the lesion area in the 15-LO transgenic/heterozygous WHHL rabbits (n = 14) was only about one third (7.7+/-5.7%) that found in nontransgenic heterozygous WHHL littermate controls (n = 11, 20.7+/-19.4%) (P < 0.05). These data suggest that overexpression of 15-LO in monocytes/macrophages protects against lipid deposition in the vessel wall during early atherogenesis in these rabbit models of atherosclerosis.
Primary Malignant Renal Tumors in the Second Decade of Life: Wilms Tumor Versus Renal Cell Carcinoma (1982)

Primary renal malignancies occur least frequently in the second decade of life. Of the 4,798 cases of renal cell carcinoma and Wilms tumor referred to the Armed Forces Institute of Pathology 53 renal cell carcinomas and 56 Wilms tumors occurred in the 10 to 20-year age group. Pathologically, both tumors in this age range are similar to those occurring at a more typical age, and histologic differentiation between renal cell carcinoma and Wilms tumor is seldom a problem. While radiographic evaluation is useful to characterize the neoplasm, evaluate the contralateral kidney and detect the presence of tumor extension, current imaging techniques cannot confidently distinguish these 2 tumors.
The Cert Guide to System and Network Security Practices (2001)

Preface. 1. The Handbook of System and Network Security Practices. I. SECURING COMPUTERS. 2. Securing Network Servers and User Workstations. 3. Securing Public Web Servers. 4. Deploying Firewalls. II. INTRUSION DETECTION AND RESPONSE. 5. Setting Up Intrusion Detection and Response Practices. 6. Detecting Signs of Intrusion. 7. Responding to Intrusions. Appendix A. Security Implementations. Appendix B. Practice-Level Policy Considerations. Index.
Multilayer electret activated by direct contact silicon electrode. (2014)

Electrets used in microelectromechanical systems (MEMS) devices are often formed by corona charging, where ionized gases are generated in an electric field to introduce a charge to the electret surface. The purpose of this study was to investigate a new technique for creating an electret from a plasma enhanced chemical vapor deposition (PECVD) multilayer film of SiO2/Si3N4/SiO2 using a direct contact electrode of silicon. The electret formation takes advantage of deep traps in silicon nitride, which are known to develop from hydrogen interactions with silicon dangling bonds and, in some stoichiometries, nitrogen dangling bonds. The electret activation process has been optimized for maximum effective surface voltage (ESV). The deposition and activation process for the electret has the additional benefit of using commercially available equipment present in many microelectronic fabrication facilities. Standardized processes for depositing the PECVD film stack and activating the electret with a wafer level bonder have been developed.Using this new process, electret films have been produced with positive and negative effective surface voltages in excess of +/‐194.0 V. Extrapolated lifetimes, based on thermal decay studies, are calculated to be 57 years and 23 years for positive and negative electrets respectively if they are maintained in moderate to low humidity environments below 125°C. Activation energy levels in positive and negative electrets are 1.4 eV and 1.2 eV respectively. This new electret multilayer film stack and direct charging method produced thin film electrets with a half‐life 5 times greater than that reported in literature by other groups using PECVD multilayer electrets [1, 2]. A new application was investigated to see how an electret may benefit semiconductor‐liquid interactions. The PECVD electret was used to apply a gate bias to the back side of a double side polished silicon wafer to determine the effect of gate bias on the etch rates of an anisotropic silicon etch in 25% wt. tetramethylammonium hydroxide (TMAH). Our results show that the positively charged electret produced a statistically significant increase in etch rate, when compared to neutral and negatively charged electrets, as the silicon‐TMAH interface approached the depletion region produced by the electret. The mean values of the silicon etch rate were evaluated for the last hour of etching with samples categorized by electret potentials as positive, negative or neutral. The positive potential electret had a mean etch rate of 12.0 um/hr for silicon as compared to 8.8 um/hr and 8.6 um/hr for negatively and neutrally charge