gebhart/patrepeval huggingface dataset:
Precision landing options in unmanned aerial vehicles (2018)

This paper presents a precision landing system for unmanned aerial vehicles (UAVs). When designing the solution, we paid special attention to the required accuracy of the various sensors. The system comprises a highly accurate flight controller and a visual sensor for object detection. The platform is constructed to integrate into various types of unmanned aerial vehicles. The method for the visual tracking of the landing platform via an optical camera enables us to increase the landing reliability. The precise position of the unmanned aerial vehicle at landing is provided by an image analysis where the specially designed landing platform is detected. All calculations for precision landing guidance are performed directly on board. An infrared (IR) camera is used as the main sensor for monitoring the IR light beam. This aircraft guidance technique does not necessitate data transfer to and from the landing station. The proposed system can be a suitable solution to replace more complex and expensive systems, such as RTK GPS (Real-Time Kinematic Global Positioning System). A hexacopter drone was used for the test flights, and the results obtained were then subjected to comparison. The navigation to the location was first tested by a GPS sensor only; subsequent tests flights, however, already relied on a visual sensor. All of the precision landing options eventually yielded the required quality.
A low power miniaturized 1.95mm<sup>2</sup> fully integrated transceiver with fastPLL mode for IEEE 802.15.4/bluetooth smart and proprietary 2.4GHz applications (2013)

This paper presents an ultra-low power miniaturized single chip transceiver operating in the ISM band at 2.4GHz. Targeting low power and minimum die size, while excluding RF-options and minimizing the count of external components for low-cost, asks for appropriate architectural choices to obtain high performance. Fast PLL locking and immediate RX-TX turn-around minimize the consumption overhead at wake-up and turn-around. With a die size of only 1.95mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> in a 90nm standard digital CMOS technology, the receiver achieves a sensitivity of -94.5dBm (1Mbps, BER 10E-3) while consuming only 7.1mA and the transmitter consumes 9.2mA for 0dBm output power. The base-band is compliant with the IEEE 802.15.4 standard, the Bluetooth Smart standard (former Bluetooth low energy BLE) and can be configured for proprietary standards at 2.4GHz, with data-rates up to 3Mbps.
A thin surface-wave antenna using a via-less EBG structure for 2.45 GHz ON-Body communication systems (2010)

A 2mm-thick surface wave antenna suited for On-Body communication systems is presented. The antenna consists in an artificial ground plane excited by a center-fed circular patch and exhibits a monopole-like radiation pattern. The proposed antenna performances (return loss, radiation pattern, efficiency, SAR calculation and non-line-of-sight path loss) are evaluated thanks to a tissue-equivalent numerical phantom and compared to other existing wearable antennas found in the literature. It appears that our antenna is a good solution for On-Body communication applications, especially when antenna thickness is a critical parameter.
Purine Nucleoside Analogues for the Treatment of Hematological Malignancies: Pharmacology and Clinical Applications (2005)

The purine nucleoside analogues (PNAs), fludarabine (FA), 2-CdA (2-chlorodeoxyadenosine, 2-CdA) and pentostatin (2'-deoxycoformycin, DCF) represent a group of cytotoxic agents with high activity in lymphoid and myeloid malignancies. PNAs share similar chemical structure and mechanism of action. Several mechanisms could be responsible for their cytotoxicity both in proliferating and quiescent cells, such as inhibition of DNA synthesis, inhibition of DNA repair and accumulation of DNA strand breaks. Induction of apoptosis through the mitochondrial pathway, direct binding to apoptosome or modulation of p53 expression all lead to apoptosis, which is the main end-point of PNA action. However, individual PNAs exhibit significant differences, especially in their interaction with enzymes involved in adenosine and deoxyadenosine metabolism. Synergistic interactions between PNAs and other cytotoxic agents (alkylating agents, anthracycline antitumor antibiotics, cytarabine, monoclonal antibodies) have been demonstrated in both preclinical and clinical studies. PNAs are highly effective in chronic lymphoid leukemias and low grade B- and T-cell non-Hodgkin's lymphomas, including Waldenström's macroglobulinemia. DCF and 2-CdA are currently the drugs of choice in hairy cell leukemia. Moreover, clinical studies have confirmed the efficacy of PNAs alone or in combination protocols in the treatment of acute myeloid leukemia and myelodysplastic syndromes. Finally, PNAs, especially FA, play an important role in non-myeloablative conditioning regimens for allogenic stem cell transplantation in high-risk patients. The toxicity profiles of PNAs are similar for all agents and consist mainly of dose-limiting myelotoxicity and prolonged immunosuppression. Three other compounds: clofarabine, nelarabine and immucillin-H are currently being evaluated clinically.
Angiographic Embolization for Epistaxis: A Review of 114 Cases (1998)

Angiography with selective embolization has become an accepted method of treating posterior epistaxis that is not controlled with conservative measures. The authors reviewed 112 cases of patients who had received selective angiographic embolization for refractory epistaxis from January 1990 to December 1995. There were 114 embolizations over this 5-year period. The immediate success rate was 93%, with long-term success achieved in 88% of patients. The overall complication rate was 17%, with the long-term morbidity rate less than 1%. Selective angiographic embolization is a safe and effective method that should be considered in the treatment of refractory epistaxis.
Petrophysics of Triple-Porosity Tight Gas Reservoirs With a Link to Gas Productivity (2011)

Summary Petrographic work on thin sections from rock samples collected in tight gas sandstones of the western Canada sedimentary basin (WCSB) shows that the sandstones are composed of intergranular, microfracture and slot, and isolated noneffective porosities. The petrographic observations of these triple-porosity rocks have led to a petrophysical interpretation with the use of a triple-porosity model. Tight gas reservoirs are very complex heterogeneous systems that have been evaluated in the past mostly with single-porosity models. We propose that these types of reservoirs can be represented better by triple-porosity models for more rigorous quantitative petrophysical characterization. The triple-porosity model discussed in this paper fits the petrographic observations very well, leading to a more rigorous characterization of effective and noneffective porosity. The petrographic and core-calibrated triple-porosity model is then used for well-log interpretation of those wells when these data are not available. The result is a reasonable quantitative characterization of the tight gas reservoir that can be used for improving hydraulic-fracturing design, flow-units determination, reservoir engineering, and simulation studies. The data can be determined at room conditions and simulated conditions of net stress. It is concluded that honoring with a triple-porosity model the different types of porosities observed in thin sections and cores leads to more-rigorous and -useful petrophysical interpretations that can be linked to gas productivity.
Targeting prostate cancer stem cells for cancer therapy. (2012)

Prostate cancer is the most common malignant neoplasm in men and the second most frequent cause of cancer death for males in the United States. Recently, emerging evidence suggests that prostate cancer stem cells (CSCs) may play a critical role in the development and progression of prostate cancer. Therefore, targeting prostate CSCs for the prevention of tumor progression and treatment of prostate cancer could become a novel strategy for better treatment of patients diagnosed with prostate cancer. In this review article, we will summarize the most recent advances in the prostate CSCs field, with particular emphasis on targeting prostate CSCs to treat prostate cancer.
Mismatch cancellation in quadrature bandpass ΔΣ modulators using an error shaping technique (2002)

A technique for shaping component mismatch error in the real and imaginary paths of a complex (quadrature) /spl Delta//spl Sigma/ are studied and simulated. Complex bandpass /spl Delta//spl Sigma/ modulators provide improved performance over a pair of real bandpass /spl Delta//spl Sigma/ modulators of the same order in the conversion of narrow-band quadrature intermediate frequency (IF) signals. This is possible due to elimination of redundant conjugate pairs of poles and zeros in its noise and signal transfer function. Mismatches in the modulators real and imaginary paths, however, results in spectral leakage of image band interference and image band quantization noise to the passband of the converted output. Strategic pole-zero placement, as well as adaptive techniques has been studied in earlier works. The work presented here takes advantage of the inherent dual paths of the complex bandpass /spl Delta//spl Sigma/ modulator to reduce component mismatch effects using a switched capacitor error shaping technique.
Hyperbaric oxygen after global cerebral ischemia in rabbits does not promote brain lipid peroxidation (1995)

Treatment with hyperbaric oxygen after ischemia increased the amount of oxygen free radicals in the brain. However, this increase in free radical generation was not associated with an increase in lipid peroxidation or a reduction in neurophysiologic recovery when measured after 75 mins of recirculation. These results suggest that hyperbaric oxygen administered immediately after global ischemia does not promote early brain injury.
A Model and Tracking Algorithm for a Class of Video Targets (1982)

Algorithms are developed for a real-time, automatic system capable of tracking two-dimensional (2-D) targets in complex scenes. A mathematical model of 2-D image spatial and temporal evolution applicable to certain classes of targets and target perturbations is developed. It is shown that for small target perturbations the 2-D tracking problem may be approximated as a 1-D time-varying parameter estimation problem. A CCD-implementable solution is developed which is particularly useful when considering target rotation and dilation and target/background separation. Results of system simulation and suggestions for future research are presented.
Immunological reactivity of herpes simplex virus 1 and 2 polypeptides electrophoretically separated and transferred to diazobenzyloxymethyl paper (1981)

In this paper we report that viral polypeptides from herpes simplex virus 1 (HSV-1) and 2 (HSV-2)-infected cells electrophoretically separated in sodium dodecyl sulfate-polyacrylamide-agarose gels and transferred to diazobenzyloxymethyl paper can react with rabbit hyperimmune sera, both polyvalent and prepared against specific antigens. The polyvalent hyperimmune sera against HSV-1 reacted with 17 HSV-1 polypeptide bands and 8 HSV-2 polypeptide bands. Concordantly, polyvalent sera against HSV-2 reacted with at least 16 HSV-2 polypeptide bands and 8 HSV-1 polypeptide bands. The antisera prepared against the specific antigens reacted with a smaller number of polypeptide bands. Preimmune sera and immune sera did not react with electrophoretically separated polypeptides from infected and uninfected cells, respectively. The immune localization of separated antigens test provides a powerful technique for identification of immunogenic viral polypeptides, especially those which are normally insoluble and therefore unavailable for immunological reactivity in immune precipitation tests.
<title>Combination gratings</title> (1996)

A combination grating is the diffractive relief structure resulting from the superposition of at least two gratings. For the case of two combined gratings, whose individual profiles are described by function f<SUB>1</SUB> and f<SUB>2</SUB>, the resultant surface relief profile is described by f<SUB>1</SUB> + f<SUB>2</SUB>. Typical examples are crossed gratings. Experimental and theoretical results for different combination gratings are presented, including examples which cannot be produced using standard holographic or ruling techniques. The applications include diffractive optical variable devices, which are applied to documents as visual high-security features.
Dairy science, 1967 (1967)

DEHY-100 substitutes for soybean oil meal in dairy rations / H. R. Conrad and J. W. Hibbs -- Corn silage as the only roughage for dairy cows / R. W. Hemken and J. H. Vandersall -- Prototype layouts for dairy cows / J. S. Boyd -- Materials handling in prototype dairy layouts / R. L. Maddex -- Silage and haylage for dairy cows / C. H. Gordon -- Maintaining the milk fat test / D. L. Palmquist
BENZODIAZA-, BENZOXAZA-, AND BENZODIOXAPHOSPHORINONES - FORMATION, REACTIVITY, STRUCTURE, AND BIOLOGICAL ACTIVITY (2000)

Abstract Although diverse phosphorus-containing heterocycles had been synthe-sized during the late nineteenth century already, work was still sparse in this area as recently as 1950[1,2]. The realization, around 1950, of the importance of phosphorus-containing substances in biological processes resulted in intense activity in preparative organophosphorus chemistry, and in an upsurge of research on structural and mechanistic problems [3–6].
Optical tank circuits used for all-optical timing recovery (1992)

A novel all-optical timing-recovery scheme that uses an optical tank circuit is presented. An optical clock synchronized to an incoming data stream is generated by extracting line spectral components in the incoming data stream using an optical resonator whose free spectral range is equal to the incoming data bit rate. The principle of operation is demonstrated using a confocal Fabry-Perot-type optical tank circuit and a fiber-ring-type optical tank circuit at 2 Gb/s and 324 Mb/s, respectively. Quality factor in the baseband domain is measured and shown to agree well with the theoretical value. A workable data bit rate, required source linewidth, and stability are discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Tunable Biomimetic Chalcogels with Fe<sub>4</sub>S<sub>4</sub> Cores and [Sn<sub><i>n</i></sub>S<sub>2<i>n</i>+2</sub>]<sup>4–</sup>(<i>n</i> = 1, 2, 4) Building Blocks for Solar Fuel Catalysis (2013)

Biology sustains itself by converting solar energy in a series of reactions between light harvesting components, electron transfer pathways, and redox-active centers. As an artificial system mimicking such solar energy conversion, porous chalcogenide aerogels (chalcogels) encompass the above components into a common architecture. We present here the ability to tune the redox properties of chalcogel frameworks containing biological Fe(4)S(4) clusters. We have investigated the effects of [Sn(n)S(2n+2)](4-) linking blocks ([SnS(4)](4-), [Sn(2)S(6)](4-), [Sn(4)S(10)](4-)) on the electrochemical and electrocatalytic properties of the chalcogels, as well as on the photophysical properties of incorporated light-harvesting dyes, tris(2,2'-bipyridyl)ruthenium(II) (Ru(bpy)(3)(2+)). The various thiostannate linking blocks do not alter significantly the chalcogel surface area (90-310 m(2)/g) or the local environment around the Fe(4)S(4) clusters as indicated by (57)Fe Mössbauer spectroscopy. However, the varying charge density of the linking blocks greatly affects the reduction potential of the Fe(4)S(4) cluster and the electronic interaction between the clusters. We find that when the Fe(4)S(4) clusters are bridged with the adamantane [Sn(4)S(10)](4-) linking blocks, the electrochemical reduction of CS(2) and the photochemical production of hydrogen are enhanced. The ability to tune the redox properties of biomimetic chalcogels presents a novel avenue to control the function of multifunctional chalcogels for a wide range of electrochemical or photochemical processes relevant to solar fuels.
The tissue renin–angiotensin system and intracellular signalling (2005)

There is a need to re-evaluate the role(s) played by the molecular components of the "extended" local renin-angiotensin system and their role in vascular disease and type 2 diabetes.
Apparatus for Recording Avoidance Movements of Fish (1973)

An apparatus is described for continuous measurements of movements of fish exposed to chemical substances in a tank. A strip chart recording provides information on position and rate of movement of the test specimen during the experiment.
Rapid Crystallization of Silicalite Nanocrystals in a Capillary Microreactor (2009)

Abstract Silicalite nanocrystals were synthesized in a pressurized capillary microreactor at 150 °C within 11 min with synthesis solutions aged at 80 or 100 °C for 1–6 h. The effects of aging of the synthesis solution and the reaction pressure were examined. The resulting products were characterized by XRD, DLS, TEM, FT‐IR and TG‐DSC. Aging of the synthesis solution played an important role in shortening the crystallization time of the silicalites. The synthesis pressure should be higher than the saturation vapor pressure of water at 150 °C (∼0.5 MPa) and silicalite nanocrystals with crystallinities of 70 % and 100 % could be produced from the synthesis solution aged at 100 °C for 2 h with residence times of 11 min at 0.7 MPa and 1 MPa, respectively. The mean particle sizes of these two samples were 102.2 nm and 166.4 nm, respectively. Thus, the crystallization time of the silicalite nanocrystals is shown to be significantly reduced in the capillary microreactor compared to a traditional batch system.
Common chemical agent threats (2002)

The events of September 11, 2001, highlight the fact that we live in precarious times. National and global awareness of the resolve and capabilities of terrorists has increased. The possibility that the civilian neurosurgeon may confront a scenario involving the use of chemical warfare agents has heightened. The information reported in this paper serves as a primer on the recognition, decontamination, and treatment of trauma patients exposed to chemical warfare agents.
To a mouse (1995)

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WiPIN: Operation-Free Passive Person Identification Using Wi-Fi Signals (2019)

Wi-Fi signals-based person identification attracts increasing attention in the booming Internet-of-Things era mainly due to its pervasiveness and passiveness. Most previous work applies gaits extracted from WiFi distortions caused by person walking to achieve the identification. However, to extract useful gait, a person must walk along a pre-defined path for several meters, which requires user high collaboration and increases identification time overhead, thus limiting use scenarios. Moreover, gait based work has severe shortcoming in identification performance, especially when the user volume is large. In order to eliminate above limitations, in this paper, we present an operation-free person identification system, namely WiPIN, that requires least user collaboration and achieves good performance. WiPIN is based on an entirely new insight that Wi-Fi signals would carry person body information when propagating through the body, which is potentially discriminated for person identification. Then we demonstrate the feasibility on commodity off-the-shelf Wi-Fi devices by well- designed signal pre-processing, feature extraction, and identity matching algorithms. Results show that WiPIN achieves 92% identification accuracy over 30 users, high robustness to various experimental settings, and low identifying time overhead, i.e., less than 300ms.
Arrhenius–Néel thermal decay in polycrystalline thin film media (1999)

A simple expression for the remanent coercivity versus field time duration has been developed for polycrystalline thin film media with two-dimensional random anisotropy axis orientation. Explicit averaging of the thermally induced reversal for random grains is shown to be well approximated by the thermal decay of one particle with anisotropy axis at an angle of ≈21° to the applied field. The expression has no adjustable parameters and two slightly different forms apply to noninteracting and weakly interacting grains. Applicability is shown to be for times greater than approximately 100 ns. Good agreement is shown with measurements on two series of thin films with varying coating thickness.
Variable length virtual output queue based fuzzy congestion control at routers (2011)

Internet routers play an important role during congestion. Most of the Internet routers have buffers at input and output ports, which hold the packets in the time of congestion. An active and efficient management of buffers is critical to minimize the congestion. However, queue management becomes very complex because of dynamics of input packets. We direct out attention to the variable length virtual queues as, to the best of our knowledge, all the queue management schemes available in the literature focus on fixed queue limit. Recognizing the fact that most of the Internet today runs drop-tail gateways we propose a modification to the drop-tail algorithm, based on Fuzzy logic control principles, which makes it a generic active queue management scheme in TCP/IP networks. The obtained simulation results are encouraging as they show low packet loss and high utilization of the buffers in comparison to drop-tail.
Window query processing for joining data streams with relations (2007)

Query processing for data streams raises challenges that cannot be directly handled by existing database management systems (DBMS). Most related work in the literature mainly focuses on developing techniques for a dedicated data stream management system (DSMS). These systems typically either do not permit joining data streams with conventional relations or simply convert relations to streams before joining. In this paper, we present techniques to process queries that join data streams with relations, without treating relations as special streams. We focus on a typical type of such queries, called star-streaming joins. We process these queries based on the semantics of (sliding) window joins over data streams and apply a load shedding approximation when system resources are limited. A recently proposed window join approximation based on importance semantics for data streams is extended in this paper to maximize the total importance of the approximation result of a star-streaming join. Both online and offline approximation algorithms are discussed. Our experimental results demonstrate that the presented techniques are quite promising in processing star-streaming joins to achieve the maximum total importance of their approximation results.