gebhart/patrepeval huggingface dataset:
Simultaneous Transmit-Receive Multi-Channel Operation in Next Generation WLANs (2020)

The next-generation IEEE 802.11 standard project, IEEE 802.11be, is focused to meet the growing demands of applications including high throughput, low latency and high reliability. With the emergence of dual-radio end user devices (STAs) and tri-band Access Points (APs), efficient operation over multiple channels distributed over multiple bands is a key technology being discussed in IEEE 802.11be task group to achieve the desired objectives. Due to insufficient channel separation in frequency, STAs might be unable to perform simultaneous transmit and receive operations over the multiple channels in an asynchronous manner. To maximize the medium utilization of such constrained STAs participating in asynchronous multi-channel operation, we design and analyze C onstraint A ware Async hronous multi-channel operation (CA-ASYNC) protocol that includes an opportunistic 802.11 backoff resumption technique applied by the constrained STAs and multichannel busy state indication by the AP to the constrained STAs. Our results show that (a) CA-ASYNC’s opportunistic backoff resumption technique significantly improves the medium utilization for constrained STAs compared to alternative strategies and (b) the multi-channel busy status indication significantly decreases the collisions due to constrained STAs and improves access delay performance.
Joint Hand Detection and Rotation Estimation Using CNN (2017)

Hand detection is essential for many hand related tasks, e.g., recovering hand pose and understanding gesture. However, hand detection in uncontrolled environments is challenging due to the flexibility of wrist joint and cluttered background. We propose a convolutional neural network (CNN), which formulates in-plane rotation explicitly to solve hand detection and rotation estimation jointly. Our network architecture adopts the backbone of faster R-CNN to generate rectangular region proposals and extract local features. The rotation network takes the feature as input and estimates an in-plane rotation which manages to align the hand, if any in the proposal, to the upward direction. A derotation layer is then designed to explicitly rotate the local spatial feature map according to the rotation network and feed aligned feature map for detection. Experiments show that our method outperforms the state-of-the-art detection models on widely-used benchmarks, such as Oxford and Egohands database. Further analysis show that rotation estimation and classification can mutually benefit each other.
Reinforcement Learning Approach for Optimal Distributed Energy Management in a Microgrid (2018)

In this paper, a multiagent-based model is used to study distributed energy management in a microgrid (MG). The suppliers and consumers of electricity are modeled as autonomous agents, capable of making local decisions in order to maximize their own profit in a multiagent environment. For every supplier, a lack of information about customers and other suppliers creates challenges to optimal decision making in order to maximize its return. Similarly, customers face difficulty in scheduling their energy consumption without any information about suppliers and electricity prices. Additionally, there are several uncertainties involved in the nature of MGs due to variability in renewable generation output power and continuous fluctuation of customers' consumption. In order to prevail over these challenges, a reinforcement learning algorithm was developed to allow generation resources, distributed storages, and customers to develop optimal strategies for energy management and load scheduling without prior information about each other and the MG system. Case studies are provided to show how the overall performance of all entities converges as an emergent behavior to the Nash equilibrium, benefiting all agents.
High-power Nd:YAG laser ablation of the endometrium. (1991)

Nd:YAG laser ablation of the endometrium has become an established procedure for the treatment of menorrhagia. Early studies utilized only half the 100-120 W available from commercially produced lasers. A preliminary in vitro study was done to measure the depth of coagulation caused by the Nd:YAG laser. Fifty watts applied with the contact or noncontact technique reached a depth of 3-4 mm, while 4-5 mm was reached using 100-120 W in the noncontact mode. Thirteen patients underwent endometrial ablation using the Nd:YAG laser at 100-120 W. The mean operating time was 31 minutes. All the patients were available for follow-up, and all had excellent results.
Interaction between the ectomycorrhizal fungus <i>Paxillus involutus</i> and <i>Pinus resinosa</i> induces resistance to <i>Fusarium oxysporum</i> (1988)

Inoculation of Pinus resinosa Ait. seedlings with the ectomycorrhizal fungus Paxillus involutus Fr. resulted in a 47% increase in resistance to subsequent infection by the root pathogenic fungus Fusarium oxysporum f.sp. pini as compared with control seedlings. This increase in seedling survival was associated with a sixfold decrease in the sporulation of F. oxysporum in the rhizosphere of seedlings inoculated with Pax. involutus when compared with the rhizosphere of control seedlings. Extraction and bioassay of the seedling rhizosphere and seedling tissues indicated that inoculation with Pax. involutus led to a fivefold increase in antibiotic activity in the rhizosphere of the seedlings treated with Pax. involutus. Most or all of the fungitoxicity was localized in the rhizosphere. Disease suppression by Pax. involutus in P. resinosa is, therefore, associated with an increase of fungitoxic chemicals in the rhizosphere of seedlings.
The natural history and incidence of Yersinia pestis and prospects for vaccination (2012)

Plague is an ancient, serious, infectious disease which is still endemic in regions of the modern world and is a potential biothreat agent. This paper discusses the natural history of the bacterium and its evolution into a flea-vectored bacterium able to transmit bubonic plague. It reviews the incidence of plague in the modern world and charts the history of vaccines which have been used to protect against the flea-vectored disease, which erupts as bubonic plague. Current approaches to vaccine development to protect against pneumonic, as well as bubonic, plague are also reviewed. The considerable challenges in achieving a vaccine which is licensed for human use and which will comprehensively protect against this serious human pathogen are assessed.
{StreamBox-TZ}: Secure Stream Analytics at the Edge with {TrustZone} (2019)

While it is compelling to process large streams of IoT data on the cloud edge, doing so exposes the data to a sophisticated, vulnerable software stack on the edge and hence security threats. To this end, we advocate isolating the data and its computations in a trusted execution environment (TEE) on the edge, shielding them from the remaining edge software stack which we deem untrusted. This approach faces two major challenges: (1) executing high-throughput, low-delay stream analytics in a single TEE, which is constrained by a low trusted computing base (TCB) and limited physical memory; (2) verifying execution of stream analytics as the execution involves untrusted software components on the edge. In response, we present StreamBox-TZ (SBT), a stream analytics engine for an edge platform that offers strong data security, verifiable results, and good performance. SBT contributes a data plane designed and optimized for a TEE based on ARM TrustZone. It supports continuous remote attestation for analytics correctness and result freshness while incurring low overhead. SBT only adds 42.5 KB executable to the TCB (16% of the entire TCB). On an octa core ARMv8 platform, it delivers the state-of-the-art performance by processing input events up to 140 MB/sec (12M events/sec) with sub-second delay. The overhead incurred by SBT's security mechanism is less than 25%.
CellTV—On the Benefit of TV Distribution Over Cellular Networks: A Case Study (2014)

As mobile IP-access is becoming the dominant technology for providing wireless services, the demand for more spectrum for this type of access is increasing rapidly.Since IP-access can be used for all types of services, instead of a plethora of dedicated, single-service systems, there is a significant potential to make spectrum use more efficient.In this paper, the feasibility and potential benefit of replacing the current terrestrial UHF TV broadcasting system with a mobile, cellular data (IP-) network is analyzed.In the cellular network, TV content would be provided as one of the services, here referred to as CellTV.In the investigation we consider typical Swedish rural and urban environments.We use different models for TV viewing patterns and cellular technologies as expected in the year 2020.Results of the quantitative analysis indicate that CellTV distribution can be beneficial if the TV consumption trend goes towards more specialized programming, more local contents, and more on-demand requests.Mobile cellular systems, with their flexible unicast capabilities, will be an ideal platform to provide these services.However, the results also demonstrate that CellTV is not a spectrum-efficient replacement for terrestrial TV broadcasting with current viewing patterns (i.e. a moderate number of channels with each a high numbers of viewers).In this case, it is doubtful whether the expected spectrum savings can motivate the necessary investments in upgrading cellular sites and developing advanced TV receiver required for the success of CellTV distribution.
Phytochemical screening and antimicrobial activity of some medicinal plants against multi-drug resistant bacteria from clinical isolates (2012)

The in vitro antibacterial activity of various solvents and water extracts of aloe vera, neem, bryophyllum, lemongrass, tulsi, oregano, rosemary and thyme was assessed on 10 multi-drug resistant clinical isolates from both Gram-positive and Gram-negative bacteria and two standard strains including Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922. The zone of inhibition as determined by agar well diffusion method varied with the plant extract, the solvent used for extraction, and the organism tested. Klebsiella pneumoniae 2, Escherichia coli 3 and Staphylococcus aureus 3 were resistant to the plant extracts tested. Moreover, water extracts did not restrain the growth of any tested bacteria. Ethanol and methanol extracts were found to be more potent being capable of exerting significant inhibitory activities against majority of the bacteria investigated. Staphylococcus aureus 1 was the most inhibited bacterial isolate with 24 extracts (60%) inhibiting its growth whereas Escherichia coli 2 exhibited strong resistance being inhibited by only 11 extracts (28%). The results obtained in the agar diffusion plates were in fair correlation with that obtained in the minimum inhibitory concentration tests. The minimum inhibitory concentration of tulsi, oregano, rosemary and aloe vera extracts was found in the range of 1.56-6.25 mg/ml for the multi-drug resistant Staphylococcus aureus isolates tested whereas higher values (6.25-25 mg/ml) were obtained against the multi-drug resistant isolates Klebsiella pneumoniae 1 and Escherichia coli 1 and 2. Qualitative phytochemical analysis demonstrated the presence of tannins and saponins in all plants tested. Thin layer chromatography and bioautography agar overlay assay of ethanol extracts of neem, tulsi and aloe vera indicated flavonoids and tannins as major active compounds against methicillin-resistant Staphylococcus aureus.
Spread of Hepatitis B Virus Antigen (1979)

<h3>To the Editor.</h3> —I wish to thank Drs Richard W. Darrell and Ginette B. Jacob for confirming my 1975 research results<sup>'</sup>in their recent article in theArchives(96:674-676, 1978). Both articles point to the possibility of spread of hepatitis B surface (HB<sub>s</sub>) virus antigen by the ophthalmologist. The possibility of spreading hepatitis virus from patients undergoing dialysis or blood transfusions and addicts is quite real. Slit-lamp examinations, tonometry, cataract extractions, and contact lens fittings are endangered with the risk of hepatitis virus antigen spread. Dialyzed patients often require ophthalmic treatment, and the history of use of dialysis is easy to obtain. Even the history of positive hepatitis B antigenemia may be known to the patient. Office examinations of patients with a history of positive antigenemia should be performed with great care so as not to contaminate office equipment. Office equipment is extremely difficult to sterilize completely after direct
Regulation of meiotic maturation1 (2007)

Mammalian oocytes are arrested at prophase of the first meiotic division before induction of maturation by the preovulatory LH surge. In vitro, oocyte maturation occurs spontaneously. The first meiotic arrest is characterized by a large nucleus called the germinal vesicle. One important signaling molecule for resumption of meiosis is cyclic AMP (cAMP). High levels of cAMP block spontaneous meiotic resumption. Research investigating the regulation of oocyte cAMP has led to the discovery of new receptors, guanosine 5'-triphosphate-binding (G) proteins, cyclases, and phosphodiesterases. Leydig insulin-like 3, a polypeptide growth factor of the insulin family, is expressed in thecal cells. Leydig insulin-like 3 activates the Leu-rich, repeat-containing, G protein-coupled receptor 8, which is expressed in the oocyte. Coupled to the inhibitory GTP binding protein, this receptor leads to a decrease in cAMP production. Treatment with Leydig insulin-like 3 polypeptide initiates meiotic progression of oocytes in preovulatory follicles, demonstrating the importance of cAMP management for meiotic resumption. Furthermore, microinjection of an antibody against stimulatory G protein (Gs) into mouse oocytes results in meiotic resumption, suggesting that meiotic arrest of the oocyte is dependent on Gs activity. The orphan Gs-linked receptor, GPR3, is expressed in the oocyte. The oocytes of GPR3-null mice resume meiosis when still in their follicles, suggesting that GPR3 is involved in the control of cAMP production and thus meiotic arrest. Cyclic nucleotides are synthesized by cyclases and degraded by phosphodiesterases. Mouse and rat oocytes express isoform 3 of adenylyl cyclase. In the mouse, the null mutation results in approximately 50% of the oocytes resuming meiosis, demonstrating the importance of the synthesis of cAMP in controlling nuclear maturation. The null mutation of the major phosphodiesterase expressed in mouse oocytes results in female sterility due to ovulation of meiotically arrested oocytes that cannot be fertilized. Maintenance of meiotic arrest is explained by constitutive cAMP signaling associated with undetectable cAMP-phosphodiesterase activity. Collectively, these results are beginning to illuminate the key signaling molecules involved in the control of intraoocyte cAMP levels, thus regulating the arrest and resumption of meiosis.
Evaluation of CPDLC and voice communication during approach phase (2015)

The objective of CPDLC is to improve the safety and efficiency of air traffic management. The safety review reports approach and landing phase of flight as the most critical phase of flight. TMA (Terminal Maneuvering Area) airspace is designated area with high volume of air traffic resulting in higher pilot and controller workload and performance requirements. To address this problem, a research studying means of using CPDLC with ATC procedures in TMA was proposed. This paper provides an analysis of existing procedures in communication between ATCO (Air Traffic Controller) and pilot in approach phase of flight and the impact of using data link communication or their combination. For purposes of this research was developed software application simulating communication between pilots and ATCO in a form of a procedural control. All procedures and simulation application was developed to meet the EUROCONTROL requirements. The research objectives were specified for general use of data link communication for procedural training to reduce number of orders, define common errors, eliminate errors using data link, create user friendly interface of software application for ATCO, create electronic only environment, identify usage of combination of voice and data link communication and compare congestion using voice and data link communication in approach phase of flight. Simulations using Beechcraft B58 flight simulator were included to evaluate pilot workload during approach phase of flight with, without or with combination of voice and data link means of communication. In results, data link communication proves itself as a tool of a significant voice communication congestion decrease to reduce controller's workload. Finally, the results of an experiment dedicated to performance improvements are presented.
Detailed Analysis of Patients with Bilateral Anterior Cruciate Ligament Injuries (1994)

To better understand anatomic and other possible predisposing factors for anterior cruciate ligament injuries, we retrospectively studied 31 patients with noncontact, bilateral injuries of this ligament. The 31 patients were carefully matched by age, sex, height, weight, and activity level with 23 control subjects who had no history of knee injury. All 54 subjects underwent a full clinical knee examination, joint hypermobility tests, a hamstring tightness assessment, a computerized tomography scan analysis, and a plain view radiographic analysis, and were asked to provide a complete immediate-family history of knee ligament injury. In addition, the 31 patients in the experimental group underwent a KT-1000 arthrometer knee laxity examination and were also asked to provide an injury profile, including mechanism of injury, treatment received for each injury, and the time interval between injuries. Measurements obtained from the computerized tomography scan analysis demonstrated a significantly wider lateral femoral condyle in the experimental group compared with the control group, indicating that certain anatomic factors may predispose people to anterior cruciate ligament injury. A significant difference was also found in the incidence rate of anterior cruciate ligament injury in the family history of the experimental group compared with the control group, indicating a possible congenital aspect of this injury.
What is a Psychoanalytic Sociology of Emotion? (2000)

(2000). What is a Psychoanalytic Sociology of Emotion? Psychoanalytic Studies: Vol. 2, No. 1, pp. 35-49.
Studies of intermediates in photoreactions of Cp2Fe2(CO)4 with CO and phosphorus ligands (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of intermediates in photoreactions of Cp2Fe2(CO)4 with CO and phosphorus ligandsShulin Zhang and Theodore L. BrownCite this: J. Am. Chem. Soc. 1993, 115, 5, 1779–1789Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://doi.org/10.1021/ja00058a024RIGHTS & PERMISSIONSArticle Views163Altmetric-Citations25LEARN 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 InReddit PDF (1 MB) Get e-AlertscloseSupporting Info (2)»Supporting Information Supporting Information Get e-Alerts
Communication architectures and algorithms for media mixing in multimedia conferences (1993)

The problem of media mixing that arises in teleconferencing applications such as teleorchestra is addressed. The mixing algorithm presented minimizes the difference between generation times of the media packets that are being mixed together in the absence of globally synchronized clocks, but in the presence of jitter in communication delays on packet switched networks. In order to support applications, such as teleorchestra, that involve a large number of participants, hierarchical mixing architectures are proposed, and it is shown that they are an order of magnitude more scalable than purely centralized or distributed architectures. Furthermore, mechanisms for minimizing the delays incurred by mixing in various communication architectures are presented. The mixing algorithms are implemented on a network of workstations connected by Ethernets, and the performance of various mixing architectures is experimentally evaluated. The results reveal the maximum number of participants that can be supported in a conference.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Mathematical Relationship Identification for Photovoltaic Systems under Dusty Condition (2015)

Solar energy, which comes from the sun in theform of solar irradiance, can be directly converted toelectricity by using photovoltaic (PV) technology. However,the properties related to the nature of semiconductors usedin solar cells, has limited the efficiency of PV systems to 15-20 %. Thus, in order to increase the efficiency of PV systems, some improvements such as applying sun trackers and maximum power point tracking controllers, has been applied in PV system installation. Although these improvements have increased the efficiency of PV systems, afew studies have shown that the deposition of dust accumulation on the PV panels can significantly decrease theefficiency of PV systems. In this study, two Photovoltaic (PV)arrays were examined, of which one was cleaned weekly andthe other was not cleaned at all during the experiment. Thepanels were installed in Serdang, Malaysia, at coordinates2°59'20"N 101°43'30"E and under tropical-based groundconditions. To evaluate the effect of all environmental factors on output power, multiple regression analysis was applied.
Performance Analysis Comparison between LoRa and Frequency Hopping-based LPWAN (2019)

The number of Internet of Things (IoT) devices are increasing exponentially as the demand for data is driving to days market. Consequently, the need for testing and implementing new technologies is inevitable to be able to adapt to the growing number of devices and applications' needs. IoT mainly relies on Low Power Wide Area Networks (LPWANs). Different LPWAN technologies have distinctive performance metrics in terms of latency, throughput, covered distances, etc. Therefore, the choice of the IoT connectivity option is crucial to satisfy the precise needs of heterogeneous applications and network deployments. Among various LPWANs, LoRa-LPWAN stands out due to upright synthesis of optimized battery lifetime, long communication range and cost. LoRa Physical layer chiefly relies on chirp spread spectrum modulation with six spreading factors, while LoRaWAN MAC protocol imposes exploiting random channel frequency-hopping for each transmission using unlicensed frequency bands. Thus, the adopted CSS modulation operating on top LoRaWAN is analogical to frequency-hopping based modulation. Given the akin medium access behaviour of exploiting frequency-hopping prompted by different layers in each system, this paper provides a data-driven comparison between LoRa and a variant of frequency-hopping based modulation; Telegram Splitting Multiple Access. Network performance comparison is conducted through system level simulations using multiple IoT applications.