gebhart/patrepeval huggingface dataset:
Model Predictive Control Approach for Autonomous Sun-Synchronous Sub-Recurrent Orbit Control (2021)

View Video Presentation: https://doi.org/10.2514/6.2021-1953.vid In recent years, control of satellites without resorting to ground stations, i.e., autonomous satellite control, has attracted significant interest due to the potential of providing high precision, flexibility, and reduced operating costs. In this paper we consider the autonomous satellite control in a Sun-synchronous Sub-recurrent orbit (SSO), in Very Low Earth Orbit (VLEO). We propose a linear time-varying Model Predictive Control (MPC) for SSO formulated based on Relative Orbital Elements (ROE). TheMPCcapabilities of handling multi-input multi-output systems subject to constraints, its predictive nature, and the usage of ROE in the cost function enables to control SSO keeping and transferring based on the ground trace, while also accounting for coasting phases where propulsion should not be engaged. The proposed method also has limited computational burden, since linear MPC requires solving a convex quadratic program for which efficient and compact solvers exists. We assess the performance of the proposed method by simulations in closed-loop with both, a nonlinear model of the satellite orbital dynamics and the GMAT simulation toolkit.
ChemInform Abstract: SYNTHESIS AND PHARMACOLOGICAL CHARACTERIZATION OF 5‐(2‐DODECYLPHENYL)‐4,6‐DITHIANONANEDIOIC ACID AND 5‐(2‐(8‐PHENYLOCTYL)PHENYL)‐4,6‐DITHIANONANEDIOIC ACID: PROTOTYPES OF A NOVEL CLASS OF LEUKOTRIENE ANTAGONISTS (1985)

Abstract Die auf verschiedenen Wegen zugänglichen Verbindungen (V) werden in die Dicarbonsäuren (VII) umgewandelt, die mit dem StandardLeukotrien‐Antagonisten (I) verglichen werden.
Organometallic Synthesis and Spectroscopic Characterization of Manganese-Doped CdSe Nanocrystals (2000)

The synthesis of II−VI semiconductor nanocrystals doped with transition metals has proved to be particularly difficult. In the case of CdSe quantum dots (QDs) produced via high-temperature pyrolysis in trioctylphosphine oxide (TOPO), specially designed precursors used in this study appear to be necessary to successfully incorporate low levels of Mn. A simple etching experiment and electron paramagnetic resonance (EPR) measurements reveal that most of the dopant atoms reside in the surface layers of the inorganic lattice. The dopant dramatically affects 113Cd magic angle spinning (MAS) nuclear magnetic resonance NMR spectra; the observed paramagnetic shift and decreased longitudinal relaxation time are consistent with Mn incorporated in the QDs. Paramagnetic atoms in QDs generate large effective magnetic fields, which implies that magnetooptical experiments can be performed simply by doping. Results from fluorescence line narrowing (FLN) studies on Mn-doped CdSe QDs mirror previous findings on undoped QDs in an external magnetic field. Experimental fitting of photoluminescence excitation (PLE) spectra of doped QDs reveals that the effective absorption line shape contains a new feature that is believed to be a previously unobserved, but theoretically predicted, optically dark fine structure state.
Efficient and tunable Er/Yb fiber grating lasers (1997)

Efficient and tunable single-frequency fiber Bragg grating (FBG) lasers are demonstrated using a novel photosensitive Er/Yb fiber design. Both sub-mW threshold pump power, and high slope efficiencies of /spl sim/31% at 1536 nm and /spl sim/26.1% at 1562 nm were achieved. Wavelength tuning could be obtained over 11 and 25 nm in 1535 and 1550 nm wavelength regions, respectively, by cavity-length tuning.
Searching for Efficient Neural Architectures for On-Device ML on Edge TPUs (2022)

On-device ML accelerators are becoming a standard in modern mobile system-on-chips (SoC). Neural architecture search (NAS) comes to the rescue for efficiently utilizing the high compute throughput offered by these accelerators. However, existing NAS frameworks have several practical limitations in scaling to multiple tasks and different target platforms. In this work, we provide a two-pronged approach to this challenge: (i) a NAS-enabling infrastructure that decouples model cost evaluation, search space design, and the NAS algorithm to rapidly target various on-device ML tasks, and (ii) search spaces crafted from group convolution based inverted bottleneck (IBN) variants that provide flexible quality/performance trade-offs on ML accelerators, complementing the existing full and depthwise convolution based IBNs. Using this approach we target a state-of-the-art mobile platform, Google Tensor SoC, and demonstrate neural architectures that improve the quality-performance pareto frontier for various computer vision (classification, detection, segmentation) as well as natural language processing tasks.
Imaging the hydroxyl surface of lizardite at atomic resolution with the atomic force microscope (1992)

The [001] surface of lizardite has been examined in air with lhe atomic force microscope (AFM). Images of the hydroxyl gxoups on the outer OH surface of the sheet of octahedra and the tops of the magnesium atoms just below the hydroxyl groups were recorded at atomic resolution. Images of the hexagonal rings of basal oxygen atoms of the sheet of. tetrahedra were recorded at molecular resolution. The images were obtained both from fresh cleavage surfaces prepared immediately prior to examination and from unprepared surfaces of crystals. There was no difference in the results from the two surfaces. The OH surface of lizardite is similar to the outer OH surface of chrysotile asbestos. Recent work on modifying chrysotile asbestos to reduce its chemical reactivity in the environrnent has centered on chemical alteration of the surface of the fibers using POCI3 and organosilicon compounds. The success of the AFM study of lizardite suegests that the AFM can be applied to studies of surface reactions of chrysotile asbestos, as well as to studies of other layer silicates and modulated layer silicates.
The role of I-region associated antigen (Ia)-bearing accessory cells in the generation of cytotoxic T cells in a subpopulation of thymocytes. (1986)

The roles of killer-helper factor (KHF) and accessory cells bearing I-region associated antigen (Ia) in the generation of cytotoxic T lymphocytes (CTL) were analyzed. Peanut agglutinin-binding (PNA+) thymocytes from C3H/HeN mice generated efficient CTL responses against 2,4,6-trinitrophenyl (TNP)-modified syngeneic spleen cells in the presence of cell-free supernatant (CFS) derived from purified protein derivatives (PPD)-stimulated Mycobacterium tuberculosis-primed BALB/c spleen cell culture (PPD-CFS). The KHF which is present in PPD-CFS devoid of the activities of IL-1 or IL-2 was required in conjunction with IL-2 for generation of CTL in PNA+ thymocytes. In contrast, PNA- thymocytes as well as spleen cells could generate CTL in the absence of helper factors. However, a significant CTL response against Ia-negative syngeneic tumor cells was not induced from either PNA+, PNA- thymocytes or spleen cells in the absence of Ia-positive accessory cells. Moreover, the treatment of spleen cells with relevant anti-Ia antiserum plus complement before TNP-modification abrogated the stimulatory capacity of TNP-spleen cells. In both cases, the addition of Ia-positive accessory cells restored the impaired capacity of TNP-modified stimulator cells. The addition of IL-1 to the culture of PNA- thymocytes or spleen cells stimulated with TNP-X5563 cells in the absence of accessory cells restored the CTL generation. In contrast, the addition of IL-1 to the culture of PNA+ thymocytes was ineffective. The role of Ia-positive accessory cells in the generation of CTL in a subpopulation of thymocytes is discussed.
Location of Mutation in the KCNQ1 and Phenotypic Presentation of Long QT Syndrome (2003)

There are no significant differences in clinical presentation, ECG parameters, and cardiac events among LQT1 patients with different locations of KCNQ1 mutations. These findings indicate that factors other than location of mutation influence clinical phenotype in patients with LQT1 mutations.
Influences of pain and learning on vibrotaction (1995)

The parallel processing of tactile information by independent channels as defined psychophysically, physiologically and anatomically has been amply described in the literature. For a unified percept to occur, however, information carried by these separate channels must be combined centrally. Furthermore, the unified percepts are affected by submodality interactions, such as the gate theory of pain whereby tactile stimulation suppresses pain, and cognitive factors (e.g., attention). Several series of experiments are presented showing that painfully hot and cold stimuli can substantially diminish vibrotactile sensation, but only when co-localized with the tactile stimuli. The effect occurs regardless of the tactile channel activated. This tough-gate acts oppositely to the pain gate and indicates centrally located touch–pain interactions. The results of additional experiments show that training of observers in an intensity-discrimination task can significantly affect the ability to distinguish differences in vibrotactile intensity. This learning effect appears to be bilateral and affects intensity as well as spatio-temporal perceptions of tactile stimuli. The effect indicates that high-level cognitive functions can influence tactile perceptions; the neural basis for these perceptions are presumably located at the cortical level.
Nonlinearity in MCF7 Cell Survival Following Exposure to Modulated 6 MV Radiation Fields (2015)

The study of cell survival following exposure to nonuniform radiation fields is taking on particular interest because of the increasing evidence of a nonlinear relationship at low doses. We conducted in vitro experiments using the MCF7 breast cancer cell line. A 2.4 × 2.4 cm(2) square area of a T25 flask was irradiated by a Varian Novalis accelerator delivering 6 MV photons. Cell survival inside the irradiation field, in the dose gradient zone and in the peripheral zone, was determined using a clonogenic assay for different radiation doses at the isocenter. Increased cell survival was observed inside the irradiation area for doses of 2, 10, and 20 Gy when nonirradiated cells were present at the periphery, while the cells at the periphery showed decreased survival compared to controls. Increased survival was also observed at the edge of the dose gradient zone for cells receiving 0.02 to 0.01 Gy when compared with cells at the periphery of the same flask, whatever the isocenter dose. These data are the first to report cell survival in the dose gradient zone. Radiotherapists must be aware of this nonlinearity in dose response.
Efficient Orchestration Mechanisms for Congestion Mitigation in NFV: Models and Algorithms (2015)

Network Functions Virtualization (NFV) has recently gained momentum among network operators as a means to share their physical infrastructure among virtual operators, which can independently compose and configure their communication services. However, the spatio-temporal correlation of traffic demands and computational loads can result in high congestion and low network performance for virtual operators, thus leading to service level agreement breaches. In this paper, we analyze the congestion resulting from the sharing of the physical infrastructure and propose innovative orchestration mechanisms based on both centralized and distributed approaches, aimed at unleashing the potential of the NFV technology. In particular, we first formulate the network functions composition problem as a non-linear optimization model to accurately capture the congestion of physical resources. To further simplify the network management, we also propose a dynamic pricing strategy of network resources, proving that the resulting system achieves a stable equilibrium in a completely distributed fashion, even when all virtual operators independently select their best network configuration. Numerical results show that the proposed approaches consistently reduce resource congestion. Furthermore, the distributed solution well approaches the performance that can be achieved using a centralized network orchestration system.
Adjunctive Thrombectomy and Distal Protection in Primary Percutaneous Coronary Intervention (2009)

A significant proportion of patients with ST-elevation myocardial infarction have persistent impairment of microvascular blood flow despite successful reperfusion of epicardial vessels. Microvascular dysfunction has been associated with larger infarct size, increased predisposition to ventricular arrhythmias, heart failure, cardiogenic shock, recurrent myocardial infarction, and death. It remains unclear whether this association is of direct mechanistic significance or whether the microcirculatory injury is an epiphenomenon and a manifestation of greater ischemic insult to the myocardium. Although several potential mechanisms have been proposed for the microvascular dysfunction, distal microembolization during mechanical reperfusion is likely to be an important contributor. Consequently, there has been increasing interest in the concept of adjunctive mechanical thrombectomy to improve outcomes in primary percutaneous coronary intervention. Until recently, randomized trials of thrombectomy and distal protection devices during primary percutaneous coronary intervention have provided conflicting results with no definitive evidence for efficacy. The recently published Thrombus Aspiration During Percutaneous Coronary Intervention in Acute Myocardial Infarction Study has rekindled the interest in this area. This trial is the largest randomized study of a thrombectomy device published to date and demonstrates that adjunctive treatment with aspiration thrombectomy during primary percutaneous coronary intervention improves surrogate and clinical end points. The aim of the present report is to review the evidence to date on the role of mechanical thrombectomy and embolic protection in native coronary arteries during primary percutaneous coronary intervention.
A Notation to Aid Column and Beam Layout Design for Reinforced Concrete Construction in China (2014)

In this paper we report on the ongoing development of a toolkit to support the design of column and beam layouts for reinforced concrete structures in China. We present a visual, human- and machine-readable notation for architects and structural engineers to rapidly model column and beam layouts, as well as our underlying considerations. In conjunction with the toolkit, which consists of a CAD package, an editor, a parser, and an interpreter, the notation addresses aspects of local construction practice and supports design considerations including appearance, structural viability, constructability, and cost.
Low cost, pervasive detection of radiation threats (2011)

The recent nuclear crisis at Fukushima, Japan is a stark reminder that radiation emergencies can and do happen. In addition to accidents, the potential use of radioactive materials by terrorists has raised serious concerns. While the primary concern has been with preventing these materials from entering the United States, thousands of dangerous radiological sources are already here within our borders, located in vulnerable locations in hospitals, food processing plants, and industrial sites. These sources pose a risk for use in two terrorist threats described by the Department of Health and Human Services (DHHS): the Dirty Bomb and the Silent Source. In a Dirty Bomb attack, radioactive material is dispersed using a conventional explosive. In a Silent Source attack, radioactive material is hidden in locations where people congregate (restaurants, airports, subway stations, shopping malls, etc.). Both scenarios can injure or kill people and cause significant political, social and economic disruption. This paper will describe the GammaPix™ technology, which has the potential to provide low cost, pervasive detection of, and warning against, radiation threats. The GammaPix technology is based on software analysis of the images produced by a surveillance or smartphone camera to measure the local gamma-ray radiation exposure at the device. The technology employs the inherent gamma-ray sensitivity of CCD and CMOS chips used in the digital image sensors of these devices. This paper describes the use of the technology in calibration and testing scenarios using installed video cameras and smartphone cameras.
Integrating Perception, Language and Problem Solving in a Cognitive Agent for a Mobile Robot (2004)

We are implementing a unified cognitive architecture for a mobile robot. Our goal is to endow a robot agent with the full range of cognitive abilities, including perception, use of natural language, learning and the ability to solve complex problems. The perspective of this work is that an architecture based on a unified theory of robot cognition has the best chance of attaining human-level performance. This agent architecture is an integration of three theories: a theory of cognition embodied in the Soar system, the RS formal model of sensorimotor activity and an algebraic theory of decomposition and reformulation. These three theories share a hierarchical structure that is the basis of their integration. These three component theories have been implemented and tested separately and their integration is currently underway. This paper describes these components and the overall architecture.
Pharyngo-cutaneous fistulae after laryngectomy.Influence of previous radiotherapy and prophylactic metronidazole (1988)

The development of a pharyngocutaneous fistulae is a major complication after total laryngectomy. In Denmark radiotherapy is the primary treatment for all laryngeal carcinomas. Based on the experience with conventional daily irradiation, a split-course radiation schedule was introduced in 1978. The charts of 106 consecutive patients laryngectomized for recurrence in the years 1975 to 1984 were examined. Thirty-four patients developed a fistula. An evaluation of the different radiotherapy schedules used during this period allowed a dose-response curve to be constructed. It showed a pronounced increase of fistulae with high doses of radiotherapy. Split-course radiotherapy caused a rise in late complications and did not improve tumor control. Large field sizes increased the number of fistulae. High-dose fractions showed a surprisingly high incidence of late complications. Prophylactic metronidazole (introduced in 1980) resulted in a highly significant decrease in the frequency of postoperative fistulae. Patients in whom fistula formed were hospitalized for an average of 54 days, patients without, for 22 days.
MULTISURFACE MATRIX ISOLATION APPARATUS FOR A VACUUM FTIR (1982)

A new multisurface matrix isolation apparatus has been designed for an IBM vacuum FTIR spectrometer. Forty five surfaces one inch by 0.35 inch are available for matrix isolation studies. A rotatable vacuum window interface permits both far and mid- infrared studies on the same sample. Two quartz crystal oscillators cooled to 10K permit a direct measure of matrix gas and reactant species molar ratios. Provision has also been made for mass spectrometric monitoring of the condensing beam. Studies of incorporation of reactive species into non volatile liquids is also possible. The design and performance of the apparatus will be discussed in detail.
City Walk: Improving GPS Accuracy for Urban Pedestrians (2008)

This article looks at the difficulities of Global Positioning System (GPS)-based positioning for pedestrians in urban areas. Urban canyons create degradation in the accuracy and integrity of GPS ranging. They can also increase the geometric dilution of receiver precision. The article describes a novel approach involving a geographic information system (GIS) database containing the geometrical description of buildings in the area. The approach involves restricting the area of possible locations, mitigating multipath effects, matching the environment with GPS measurements, and employing models to compute accurate fixes. The intrinsic freedom of the pedestrian is maintained. The article then describes how this new method was implemented using GIS products which enabled the concept to be used as light middleware on mass market terminals such as personal navigation devices or personal digital assistants (PDAs). Results from tests conducted in several cities reveal significant improvements in the accuracy of GPS-based positioning.
Primary Stability of an Acromioclavicular Joint Repair Is Affected by the Type of Additional Reconstruction of the Acromioclavicular Capsule (2018)

Combined stabilization of the AC capsule and CC ligaments demonstrated the greatest capacity to restore the native stability against translational and rotational loads, with the specific configuration of the AC capsule repair to be chosen according to the personal preferences of the surgeon.
Analysis of the mechanism for extracellular processing in the presentation of human immunodeficiency virus‐1 envelope protein‐derived peptide to epitope‐specific cytotoxic T lymphocytes (2000)

An immunodominant epitope of human immunodeficiency virus-1 (HIV-1) gp160 recognized by Dd class I major histocompatibility complex (MHC) molecule-restricted, CD8+ cytotoxic T lymphocytes (CTL) was originally identified as a peptide composed of 15 amino acids (P18IIIB: RIQRGPGRAFVTIGK). However, further study has indicated that a 10-mer peptide, I-10 (RGPGRAFVTI), within P18IIIB is the minimal-sized epitope and the trimming step(s) of two carboxyl terminal amino acids (GK) is essential to produce I-10 from P18IIIB. In the processing, angiotensin-1-converting enzyme (ACE), found in sera, plays a central role in generating I-10. Target cells could be sensitized with I-10 under conditions where ACE activity in the sera was abrogated. In contrast, in the case of P18IIIB, requiring further processing to delete the C-terminus of two amino acids in order to act, sensitization of target cells was completely abrogated under the conditions. Pretreatment of target cells with brefeldin A (BFA), preventing the presentation of endogenous antigens from the class I MHC molecule pathway, did not inhibit the presentation of P18IIIB. Moreover, glutaraldehyde-fixed cells, which can not process native protein, though they could present the exogenously added peptides, were also sensitized by P18IIIB. These results clearly demonstrate that the fine processing to produce I-10 occurred in the extracellular milieu. Furthermore, our result suggests that the longer P18IIIB can bind to the class I molecules on the cell surface, and then be trimmed by ACE while it is bound. The mechanisms behind the extracellular processing outlined in this paper will offer important information for designing peptide-based vaccines to elicit MHC molecule-restricted effectors.