gebhart/patrepeval huggingface dataset:
Gabriella: An Online System for Real-Time Activity Detection in Untrimmed Security Videos (2021)

Activity detection in security videos is a difficult problem due to multiple factors such as large field of view, presence of multiple activities, varying scales and viewpoints, and its untrimmed nature. The existing research in activity detection is mainly focused on datasets, such as UCF-101, JHMDB, THUMOS, and AVA, which partially address these issues. The requirement of processing security videos in real-time makes this even more challenging. In this work, we propose Gabriella, a real-time online system to perform activity detection on untrimmed security videos. The proposed method consists of three stages: tubelet extraction, activity classification, and online tubelet merging. For tubelet extraction, we propose a localization network which takes a video clip as input and spatio-temporally detects potential foreground regions at multiple scales to generate action tubelets. We propose a novel Patch-Dice loss to handle large variations in actor size. Our online processing of videos at a clip level drastically reduces the computation time in detecting activities. The detected tubelets are assigned activity class scores by the classification network and merged together using our proposed Tubelet-Merge Action-Split (TMAS) algorithm to form the final action detections. The TMAS algorithm efficiently connects the tubelets in an online fashion to generate action detections which are robust against varying length activities. We perform our experiments on the VIRAT and MEVA (Multiview Extended Video with Activities) datasets and demonstrate the effectiveness of the proposed approach in terms of speed (~100 fps) and performance with state-of-the-art results. More details about this work are available on our project webpage <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sup> https://www.crcv.ucf.edu/research/projects/gabriella-an-online-system-for-real-time-activity-detection-in-untrimmed-security-videos.
<title>Design of illumination lenses via extrinsic differential geometry</title> (1998)

A novel method is described of designing lenses for general illumination tasks that are not circularly symmetric. The crux of the method is the specification of the illumination task by a grid on the unit sphere of directions. This grid, or tessellation, has cells which vary in solid angle such that each encompasses the same luminous flux: high intensity corresponds to small cells, and vice versa. Another grid, having the same topology and number of cells, is formed according to the intensity distribution of the source. An illumination lens must then transform the source distribution into the task distribution, via one or more refractions. Thus the direction vector of a cell in the source grid must be redirected into that of the corresponding cell in the task grid. Snell's law in vector form enables the derivation of a corresponding surface normal vector, or sequence of normal vectors, that will accomplish this redirection. Extrinsic differential geometry is then used to generate a lens surface having, as closely as possible, this distribution of surface normals, which must be irrotational to generate a smooth surface. This class of lenses has only recently become producible due to the advent of electric-discharge machining for the shaping of non-rotationally symmetric injection molds for plastic lenses.
Graphene-Based Reversible Nano-Switch/Sensor Schottky Diode (2010)

This proof-of-concept device consists of a thin film of graphene deposited on an electrodized doped silicon wafer. The graphene film acts as a conductive path between a gold electrode deposited on top of a silicon dioxide layer and the reversible side of the silicon wafer, so as to form a Schottky diode. By virtue of the two-dimensional nature of graphene, this device has extreme sensitivity to different gaseous species, thereby serving as a building block for a volatile species sensor, with the attribute of having reversibility properties. That is, the sensor cycles between active and passive sensing states in response to the presence or absence of the gaseous species.
Interactive Voice Response Mashup System for Service Enhancement (2013)

Mashup service is common in the realm of web development. Mashup, generally, is a web page that sources two or more data sources to create a new and an improved service. While mashup service is a common phenomenon in the web development scenario, there is no such mashup for services that are based on voice user interface in the Interactive Voice Response (IVR) systems. IVR based telephony services have been popular because they are an easy and a convenient means to inquire, seek information or book services. At the same time frequently used service, like taxi usually has multiple service operators. Though the Same Service is provided by Multiple Operators (SSMO) to the end user, their access points are different and require the user to choose a particular service operator to call. Unlike a web portal or a web mashup, there is no way for the user to comparatively and simultaneously check the offerings from SSMO and choose the best among them. This paper describes a novel approach, based on a recent patent, to create a mashup service by integrating two or more IVR services. Keywords: IVR Mashup, User experience, Telephony channel, service integration.
General Catalyst Control of the Monoisomerization of 1-Alkenes to <i>trans</i>-2-Alkenes (2014)

After searching for the proper catalyst, the dual challenges of controlling the position of the double bond, and cis/trans-selectivity in isomerization of terminal alkenes to their 2-isomers are finally met in a general sense by mixtures of (C5Me5)Ru complexes 1 and 3 featuring a bifunctional phosphine. Typically, catalyst loadings of 1 mol % of 1 and 3 can be employed for the production of (E)-2-alkenes at 40-70 °C. Catalyst comprising 1 and 3 avoids more than any other known example the thermodynamic equilibration of alkene isomers, as the trans-2-alkenes of both nonfunctionalized and functionalized alkenes are generated.
A random broadcast consensus synchronization algorithm for large scale wireless mesh networks (2012)

In wireless mesh networks, a robust synchronization is an enabler for optimizing performance, for example allowing powerful radio resource management and energy saving. In this paper, we combine a consensus algorithm, already proven efficient for the synchronization of wireless mesh networks, with a random broadcast for fully distributing its implementation. Unfortunately, when the distances between the wireless devices increase, the accumulation of non-negligible propagation delays resulting from the consensus algorithm introduce a drift in addition to the clock skew and offset of each node. We introduce a monitoring and broadcasting of the drift correction by a reference node that does not participate to the consensus algorithm, and show this allows for both solving the clock drift and aligning all nodes to the reference node's clock.
Ultra-high Resolution and Compact Spectrometers using Volume Holograms as Dispersive Elements (2007)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Chaoray Hsieh, Omid Momtahan, Majid Badieirostami, Ali Adibi; Ultra‐high Resolution and Compact Spectrometers using Volume Holograms as Dispersive Elements. AIP Conf. Proc. 24 October 2007; 949 (1): 272–279. https://doi.org/10.1063/1.2812308 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
Observability analysis of a vision-aided inertial navigation system using planar features on the ground (2013)

In this paper, we present an observability analysis of a vision-aided inertial navigation system (VINS) in which the camera is downward looking and observes a single point feature on the ground. In our analysis, the full INS parameter vector (including position, velocity, rotation, and inertial sensor biases) as well as the 3D position of the observed point feature are considered as state variables. In particular, we prove that the system has only three unobservable directions corresponding to global translations along the x and y axes, and rotations around the gravity vector. Hence, compared to general VINS, an advantage of using only ground features is that the vertical translation becomes observable. The findings of the theoretical analysis are validated through real-world experiments.
Miniaturization and image optimization of a full-color holographic display system using a vibrating light guide (2022)

In this study, a miniaturized full-color holographic reconstruction system that uses a single spatial light modulator to achieve full-color image reconstruction was developed. The reconstruction system uses a single light guide for light combination and is therefore less voluminous than conventional reconstruction systems. The experimental results demonstrated that the system had a full-color display, corrected light combination, and eliminated zero-order light. The vibrations of the light guide disrupted the temporal coherence of the laser beam, thus ensuring that the speckle in the reconstructed image was almost imperceptible to the human eye.
BBB: Simplifying Persistent Programming using Battery-Backed Buffers (2021)

Non-volatile memory (NVM) is poised to augment or replace DRAM as main memory. With the right abstraction and support, non-volatile main memory (NVMM) can provide an alternative to the storage system to host long-lasting persistent data. However, keeping persistent data in memory requires programs to be written such that data is crash consistent (i.e. it can be recovered after failure). Critical to supporting crash recovery is the guarantee of ordering of when stores become durable with respect to program order. Strict persistency, which requires persist order to coincide with program order of stores, is simple and intuitive but generally thought to be too slow. More relaxed persistency models are available but demand higher programming complexity, e.g. they require the programmer to insert persist barriers correctly in their program. We identify the source of strict persistency inefficiency as the gap between the point of visibility (PoV) which is the cache, and the point of persistency (PoP) which is the memory. In this paper, we propose a new approach to close the PoV/PoP gap which we refer to as Battery-Backed Buffer (BBB). The key idea of BBB is to provide a battery-backed persist buffer (bbPB) in each core next to the L1 data cache (L1D). A store value is allocated in the bbPB as it is written to cache, becoming part of the persistence domain. If a crash occurs, battery ensures bbPB can be fully drained to NVMM. BBB simplifies persistent programming as the programmer does not need to insert persist barriers or flushes. Furthermore, our BBB design achieves nearly identical results to eADR in terms of performance and number of NVMM writes, while requiring two orders of magnitude smaller energy and time to drain.
Immunopathogenesis and therapy of cutaneous T cell lymphoma (2005)

Cutaneous T cell lymphomas (CTCLs) are a heterogenous group of lymphoproliferative disorders caused by clonally derived, skin-invasive T cells. Mycosis fungoides (MF) and Sezary syndrome (SS) are the most common types of CTCLs and are characterized by malignant CD4(+)/CLA(+)/CCR4(+) T cells that also lack the usual T cell surface markers CD7 and/or CD26. As MF/SS advances, the clonal dominance of the malignant cells results in the expression of predominantly Th2 cytokines, progressive immune dysregulation in patients, and further tumor cell growth. This review summarizes recent insights into the pathogenesis and immunobiology of MF/SS and how these have shaped current therapeutic approaches, in particular the growing emphasis on enhancement of host antitumor immune responses as the key to successful therapy.
Optimal oligonucleotide sequences for TLR9 inhibitory activity in human cells: lack of correlation with TLR9 binding (2011)

Toll-like receptor (TLR)9 performs our innate response to bacterial DNA, warning us of the presence of infection. Inhibitory oligodeoxyribonucleotides (INH-ODN) have been developed that selectively block activation of mouse TLR9. Their inhibitory motif consisting of CCx(not-C)(not-C)xxGGG (x = any base) also reduces anti-DNA antibodies in lupus mice. The current study demonstrates that this motif also provides the sequences required to block TLR9 in human B cells and human embryonic kidney (HEK) cells transfected with human TLR9. However, extending the sequence by four to five bases at the 5' end enhanced activity and this enhancement was greater when a phosphorothioate (pS) backbone replaced the native phosphodiester (pO) backbone. A series of pO-backbone INH-ODN representing a 500-fold range of activity in biologic assays was shown to cover less than a 2.5-fold range of avidity for binding human TLR9-Ig fusion protein, eliminating TLR9 ectodomain binding as the explanation for sequence-specific differences in biologic activity. With few exceptions, the relative activity of INH-ODN in Namalwa cells and HEK/human TLR9 cells was similar to that seen in mouse B cells. INH-ODN activity in human peripheral blood B cells correlated significantly with the cell line data. These results favor the conclusion that although the backbone determines strength of TLR9 binding, critical recognition of the INH-ODN sequence necessary for biologic activity is performed by a molecule that is not TLR9. These studies also identify the strongest INH-ODN for human B cells, helping to guide the selection of INH-ODN sequences for therapeutics in any situation where inflammation is enhanced by TLR9.
Preparation of (La<sub>1-x</sub>Sr<sub>x</sub>)<sub>2</sub>CuO<sub>4-δ</sub> Superconducting Films by Screen Printing Method (1987)

(La 1- x Sr x ) 2 CuO 4-δ (LSCO) films were prepared by a screen printing method. Electrical properties of the films were strongly dependent on sintering time and especially on substrate material. Quartz and corning #7059 substrates are found to react with LSCO under high-temperature sintering conditions. Crack formation was observed in the films printed on alumina substrates and sintered at 1000°C. Superconducting films could be obtained by using yttrium stabilized zirconia (YSZ) and La 2 CuO 4 as substrates; T c onset of 42 K and the temperature of zero resistivity as high as 25 K were achieved.
4-(1,2,5,6-Tetrahydro-1-alkyl-3-pyridinyl)-2-thiazolamines: a novel class of compounds with central dopamine agonist properties (1990)

The design, synthesis, and pharmacological properties of a novel type of 4-(1,2,5,6-tetrahydro-1-alkyl-3-pyridinyl)-2-thiazolamine with dopaminergic properties are described. In particular, 4-(1,2,5,6-tetrahydro-1-propyl-3-pyridinyl)-2-thiazolamine (4c, PD 118440) and its allyl analogue (4i, PD 120697) have been identified as orally active dopamine (DA) agonists with pronounced central nervous system effects in tests that include [3H]-haloperidol and [3H]-N-propylnorapomorphine binding, inhibition of striatal DA synthesis, inhibition of DA neuronal firing, inhibition of spontaneous locomotor activity, and reversal of reserpine-induced depression in rats. The DA autoreceptor selectivity of these heterocyclic analogues of 3-(1-propyl-3-piperidinyl)phenol (3-PPP) was also evaluated. In this series, DA agonist activity was found to be highly dependent on the size of the N-alkyl substituent, the saturation level of the six-membered ring, and the mode of attachment of the 2-aminothiazole ring.
A Metal–Organic Framework with Optimized Open Metal Sites and Pore Spaces for High Methane Storage at Room Temperature (2011)

Besser als verlangt: Die Volumenspeicherkapazität für Methan von UTSA-20 (siehe Bild) ist mit 195 cm3 cm−3 höher als der von der US-Energiebehörde bei Raumtemperatur und 35 bar vorgegebene Wert von 180 cm3 cm−3. UTSA-20, ein auf einem neuartigen trinodalen (3,3,4)-Netz basierendes Metall-organisches Gerüst ist dank offener Kupferpositionen und optimaler Porenräume das Material mit der höchsten Methanspeicherdichte (0.22 g cm−3) in Mikroporen. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Myocardial<i>T</i><sub>2</sub>mapping with respiratory navigator and automatic nonrigid motion correction (2012)

Quantitative T₂ mapping was recently shown to be superior to T₂-weighted imaging in detecting T₂ changes across myocardium. Pixel-wise T₂ mapping is sensitive to misregistration between the images used to generate the parameter map. In this study, utility of two motion-compensation strategies-(i) navigator gating with prospective slice correction and (ii) nonrigid registration-was investigated for myocardial T₂ mapping in short axis and horizontal long axis views. Navigator gating provides respiratory motion compensation, whereas registration corrects for residual cardiac and respiratory motion between images; thus, the two strategies provided complementary functions. When these were combined, respiratory-motion-induced T₂ variability, as measured by both standard deviation and interquartile range, was comparable to that in breath-hold T₂ maps. In normal subjects, this combined motion-compensation strategy increased the percentage of myocardium with T₂ measured to be within normal range from 60.1% to 92.2% in short axis and 62.3% to 92.7% in horizontal long axis. The new motion-compensated T₂ mapping technique, which combines navigator gating, prospective slice correction, and nonrigid registration to provide through-plane and in-plane motion correction, enables a method for fully automatic and robust free-breathing T₂ mapping.
Photodynamic therapy for skin field cancerization: an international consensus. International Society for Photodynamic Therapy in Dermatology (2012)

Field cancerization is a term that describes the presence of genetic abnormalities in a tissue chronically exposed to a carcinogen. These abnormalities are responsible for the presence of multilocular clinical and sub-clinical cancerous lesions that explains the increased risks of multiple cancers in this area. With respect to the skin, this term is used to define the presence of multiple non-melanoma skin cancer, its precursors, actinic keratoses and dysplastic keratinocytes in sun exposed areas. The multiplicity of the lesions and the extent of the area influence the treatment decision. Providing at least equivalent efficacy and tolerability, field directed therapies are therefore often more worthwhile than lesion targeted approaches. Photodynamic therapy (PDT) with its selective sensitization and destruction of diseased tissue is one ideal form of therapy for this indication. In the following paper the use of PDT for the treatment of field cancerized skin is reviewed and recommendations are given for its use.
Selective Brain Cooling with Transnasal Flow of Ambient Air for Pediatric Resuscitation (2018)

Discharge rates and neurologic outcome from out‐of‐hospital pediatric cardiac arrest remains poor. The recent THAPCA trial for out‐of‐hospital pediatric cardiac arrest reported only a small, non‐significant favorable outcome with hypothermic treatment. A major limitation of this study was the median 5.9‐hour delay in inducing hypothermia, as studies in animals show loss of efficacy with this delay in initiation of hypothermia. To minimize this delay, we developed a simple yet innovative technique of transnasal cooling. Air at ambient temperature is passed through standard nasal cannula and out of the mouth to produce evaporative cooling of the nasal passages and a countercurrent heat exchange with cephalic arterial blood. We determined whether an age‐dependent effect exists in the ability to cool the brain because of potential differences in air humidification capacity during development. We studied piglets at 2–5 days of age (1.8 kg; 40 g brain weight), 2 weeks of age (4 kg; 45 g brain weight) and 6 weeks of age (16 kg; 75 g brain weight; adult brain = 110 g). The corresponding nasal turbinate surface area was estimated to be 3176±243, 4847±417, and 8651±1234 mm 2 . In anesthetized 1.8‐kg piglets with mechanical ventilation and an open mouth to permit airflow exit, institution of nasal airflow of 4 L/min through nasal cannula decreased brain temperature from 38.0±0.4°C to 36.4±0.9, 35.6±1.2, and 34.4±1.7°C at 30, 60, and 120 min, respectively. In 4‐kg piglets, nasal airflow of 32 L/min decreased brain temperature from 38.3±0.3°C to 35.0±0.6, 33.8±0.6, and 31.9±0.6°C at 30, 60, and 120 min, respectively. In 16‐kg piglets, nasal airflow of 32 L/min decreased brain temperature from 38.5±0.4°C to 35.1±1.6, 34.1±1.8, and 32.9±1.6°C at 30, 60, and 120 min, respectively. No further benefit was seen by increasing airflow to 48 L/min. No substantial spatial temperature gradients were seen among the sensory cortex, putamen, thalamus, cerebellum and olfactory bulb in any age group, suggesting that heat transfer is via blood convection rather than direct conduction from the airway wall. Decreases in rectal temperature lagged brain temperature by 30–60 min at all three ages. The rapid and selective brain cooling indicates that a high humidifying capacity of the nasal turbinates is present early in life. Because of its simplicity, portability, and low cost, transnasal cooling potentially could be deployed in the field by emergency medical technicians, in both community hospital emergency rooms, and in low resource areas for early initiation of brain cooling prior to maintenance with standard surface cooling after pediatric cardiac arrest. Support or Funding Information Supported by NIH NS095036 This abstract is from the Experimental Biology 2018 Meeting. There is no full text article associated with this abstract published in The FASEB Journal .
Non-Coherent Grassmann TCM Design for Physical-Layer Network Coding in Bidirectional MIMO Relaying Systems (2011)

We investigate non-coherent multi-input multi-output (MIMO) signal processing which requires no channel state information (CSI) at either the transmitter or the receiver. With non-coherent codes on Grassmann manifold, a receiver employing generalized likelihood ratio test (GLRT) algorithm offers the maximum-likelihood performance even without CSI. However, the conventional GLRT suffers from a severe performance degradation when the channel changes fast within a coding block duration.We propose an improved GLRT algorithm referred to as high-order super-block techniques. The super-block scheme makes effective use of correlated channels for adjacent blocks in slow fading, whereas the high-order scheme can overcome the channel fluctuation during a block in fast fading. We demonstrate that the proposed scheme significantly improves performance for MIMO-OFDM with non-coherent Grassmann space-frequency block codes (SFBC).
Production of Interleukin-20 cytokines limits bacterial clearance and lung inflammation during infection by Streptococcus pneumoniae (2018)

This work was supported by CNRS, INSERM, INSERM-transfert, the University of Lille and the Fondation du Souffle (Paris, France).