Miracle-dz/UniFAR-FTUs huggingface dataset:
Improving semantic topic clustering for search queries with word co-occurrence and bigraph co-clustering

Uncovering common themes from a large number of unorganized search queries is a primary step to mine insights about aggregated user interests. Common topic modeling techniques for document modeling often face sparsity problems with search query data as these are much shorter than documents. We present two novel techniques that can discover semantically meaningful topics in search queries: i) word co-occurrence clustering generates topics from words frequently occurring together; ii) weighted bigraph clustering uses URLs from Google search results to induce query similarity and generate topics. We exemplify our proposed methods on a set of Lipton brand as well as make-up & cosmetics queries. A comparison to standard LDA clustering demonstrates the usefulness and improved performance of the two proposed methods. keywords: search queries, topic clustering, word cooccurrence, bipartite graph, co-clustering
Potential Host Range of the Newly Introduced Aphid Parasitoid Aphidius transcaspicus (Hymenoptera: Braconidae) in Hawaii

Aphidius transcaspicus Telenga, a mealy plum aphid (Hyalopterus pruni Geoffroy) parasitoid from the Mediterranean, was recently introduced into Hawaii for control of invasive aphids. Under laboratory conditions the parasitoid successfully attacked several important aphid pests in Hawaii, including the melon aphid Aphis gossypii Glover, the banana aphid Pentalonia nigronervosa (Coquerel), the green peach aphid Myzus persicae (Sulzer), the corn leaf aphid Rhopolosiphum maidis (Fitch), and the cowpea aphid Aphis craccivora Koch. It could not successfully parasitize the tur- nip aphid Lipaphis pseudobrassicae Kalt or the black citrus aphid Toxoptera aurantii (Boyer de Fonscolombe). Field cage tests with P. nigronervosa and M. persicae also showed that A. transcaspicus successfully attacked both host species under semi-natu- ral conditions, and preferred M. persicae over P. nigronervosa.
A context-aware personalized venue recommender system on smart device

A context-aware recommender system recommends user the items that relevant to the current contexts such as time, location or weather. Generally, the venue recommender system repeatedly suggests the same places every time that user requests for the attractive venues around the location. In fact, individual user has diverse interested in visiting places based on personalized activities according to time of day. To improve the venue recommendation, this paper proposes a context-aware venue recommender system. The contexts focus on the location of device and time of day. Each user has a defined individual category timeline. Every time user acts with the application, such as search or click, the activities are recorded in the system in order to improve the next recommendation results by modifying the category timeline of user. The result reveals that the proposed method improves the recommended venues every time user has an activity with the application, which based on the contexts and the personalized activities of an individual user.
Energy efficiency in buildings using MPC and LQI with Kalman filtering

This article proposes a strategy for efficient heating in a building during winter season. The main objectives are to heat the building by combining non-renewable energy sources with renewable ones, to keep the indoor air temperature at a reference according to the hours of occupancy by using model predictive control and linear quadratic integral control with Kalman Filtering and to reduce the costs of non-renewable electric heating by taking into consideration the price of electricity which varies over 24h. The approach is simulated in MATLAB and the results are presented.
On the Assignment of Code Bits to Orthogonal Transmission Resources

This paper introduces the concept of mapping code bits onto orthogonal channel links of different quality according to their importance for decoding. The applicability of this concept is shown with the gain in decoding performance using a punctured parallel concatenated convolutional code (PCCC) and OFDM transmission over a fading channel. For this application, strategies are proposed which require minimal signaling, and highly punctured codes are found to yield greatest improvement. The proposed mapping concept is combinable with other link adaptation techniques.
The physical self description questionnaire : furthering research linking physical self-concept, physical activity and physical education

Physical self-concept (PSC) is an important mediator of outcomes in physical education. Recent research has demonstrated that PSC contributes to improving levels of physical activity and skill development associated with physical education classes beyond what can be explained by prior measures of skill and activity. PSC represents a discreet domain within Shavelson, Hubner and Stanton’s (1976) multidimensional, hierarchical model of selfconcept. The Physical Self-Description Questionnaire (PSDQ; Marsh, 1996) was developed to measure PSC through scales measuring nine specific and two global components of PSC. This instrument has proven to be psychometrically robust. Applying advanced methodology in the development of short forms of an established instrument, we demonstrate a new short form of the PSDQ (PSDQ-S), which retains good reliability and a well defined, replicable factor structure. This new instrument, tested with the Australian general community, utilizing a construct validation approach, would be an excellent measure for use in physical education programs.
A Subnanosecond Jitter Trigger Generator Utilizing Trigatron Switch and Avalanche Transistor Circuit

High-performance trigger generators with high amplitude, fast rise time, low jitter are essential for large-scaled pulsed-power systems. Most of the trigger generators are also tiny multistage pulsed-power systems with complicated structures. In this paper, a high-performance trigger generator was proposed by combining the advantages of low-jitter semiconductor switch and high-power gas switch. An avalanche transistor Marx circuit was developed. It was used to trigger a two-stage Marx generator based on trigatron switch. The output characteristics of the Marx circuit based on avalanche transistors and the two-stage Marx generator were studied. The experimental results show that a subnanosecond jitter, nanosecond rise time, high-voltage trigger generator can be achieved by triggering trigatron switch with an avalanche transistor circuit.
Active 2nd-order intermodulation calibration for direct-conversion receivers

A temperature-compensated active IM2 calibration circuit for direct-conversion receivers is fabricated with a mixer in 0.25mum CMOS. A squaring circuit senses the RF signal and generates a calibration current to cancel mixer IM2 distortion. The loading effect and noise contribution are minimized by gain boosting. IIP2 is boosted >20dB to >80dBm in the IMT band. The calibration circuit draws 1.5mA
E-Lithe: A Lightweight Secure DTLS for IoT

Internet of Things (IoT) has emerged as a new paradigm which aims to connect millions of devices that communicate and exchange data amongst each other. However, this communication between devices makes IoT vulnerable to security threats. Different security solutions have been proposed for constrained IoT devices such as Constrained Application Protocol (CoAP) integrated with Datagram Transport Layer Security (DTLS). However, DTLS is computationally expensive for constrained devices. Furthermore, it is vulnerable to the Denial of Service (DoS) attacks. This research aims to propose an enhanced and lightweight DTLS for constraint IoT devices named as Enhanced Lightweight DTLS for IoT (E-Lithe). The enhancement to the proposed E-Lithe is made by adding the concept of a Trusted Third Party (TTP) for the pre-exchange of secret keys. This TTP makes the DTLS resilient against DoS attacks. Furthermore, to make the proposed DTLS lightweight, a compression scheme called Next Header Compression (NHC) is used. To implement the proposed E-Lithe, Contiki OS with Cooja simulator is used. We evaluate the performance of E-Lithe and the results reveal that the proposed E-Lithe outperforms the existing approaches in terms of three parameters, i.e., power consumption, packet size and running time.
28-DAYS SUBACUTE TOXICITY PROFILE OF ETHANOLIC EXTRACT OF NYCTANTHES ARBOR-TRISTIS CALYX IN RATS

Nyctanthes arbour-tristis (NAT), Oleaceae, is one of the most popular medicinal plant in Ayurvedic and Homeopathic Systems of Indian medicine. NAT flowers possess multiple pharmacological activities and its calyx is reported to possess carotenoids which is responsible for rendering all its medicinal properties. The rationale behind present study involves NAT flowers consumption for various medicinal utilities and commonly as a food ingredient without any information about its associated risks. Therefore for the present study, OECD guideline no.407 of 28 days sub-acute toxicity study was followed critically by using 48 wistar rats of either sex (24 male and 24 female). The dose range of 250, 500 and 750 mg/kg body weight of NAT extract was selected based on preliminary dose determination experiments and administered by oral gavage to the respective groups.NAT calyx extract treatment induced significant alterations in essential haematological parameters like RBCs, MCV, MCHC and Platelets in atleast one treated group thereby indicating its toxic effect on haematological system after the exposure for 28 days. ALT levels were significantly increased by NAT treatment suggesting its possible hepatotoxic nature after exposure for 28 days. Mortality of four animals from treated groups was recorded at the intermediate stage of the study. Hence, caution should be exercised with NAT calyx treatment at the concentration of 250 mg/kg bw and above, when required to be consumed for the period greater than 14 days.
Test Vector Leakage Assessment ( TVLA ) Derived Test Requirements ( DTR ) with AES 1 Document

3 Device and Data Acquisition Set-up The analyst shall perform device signal tapping, data acquisition, and post-data collection signal processing sufficient to demonstrate leakage of unmasked cryptographic quantities, such as input and/or output messages. Leakage from these values must be used to confirm successful signal tapping (for power) or probing (for electromagnetic analysis) and acquisition.
A Survey on Various Compression Methods for Medical Images

Medical image compression plays a key role as hospitals move towards filmless imaging and go completely digital. Image compression will allow Picture Archiving and Communication Systems (PACS) to reduce the file sizes on their storage requirements while maintaining relevant diagnostic information. Lossy compression schemes are not used in medical image compression due to possible loss of useful clinical information and as operations like enhancement may lead to further degradations in the lossy compression. Medical imaging poses the great challenge of having compression algorithms that reduce the loss of fidelity as much as possible so as not to contribute to diagnostic errors and yet have high compression rates for reduced storage and transmission time. This paper outlines the comparison of compression methods such as ShapeAdaptive Wavelet Transform and Scaling Based ROI, JPEG2000 Max-Shift ROI Coding, JPEG2000 ScalingBased ROI Coding, Discrete Cosine Transform, Discrete Wavelet Transform and Subband Block Hierarchical Partitioning on the basis of compression ratio and compression quality.
60 GHz variable gain LNA with small NF variation

In this paper, a 60 GHz transformer based wide noise figure (NF) bandwidth low noise amplifier (LNA) is presented. The proposed LNA consists of 2-stage cascode differential structure with transformer in each matching network. It is implemented with Clover-shaped transformer to get wide band performance of the NF and proposed Pot-shaped transformer to achieve low loss and area effectiveness. This shows the NF of 5.16 dB, and the variation of the NF in gain bandwidth is less than 0.4 dB. Gain and bandwidth of the LNA is 20.2 dB and 5 GHz with 28 mW DC power consumption. Also, the gain variation of the proposed LNA is 7 dB to 20.2 dB. This is fabricated using 65-nm RF CMOS process with a chip area of 0.54 × 0.8 mm2.
Method for Detecting an Open-Switch Fault in a Grid-Connected NPC Inverter System

This paper proposes a fault-detection method for an open-switch fault in the switches of grid-connected neutral-point-clamped inverter systems. The proposed method can not only detect the fault condition but also identify the location of the faulty switch. In the proposed method, which is designed by incorporating a simple switching control in the conventional method, the fault condition is detected on the basis of the radius of the Concordia current pattern, and the location of the faulty switch can be identified. By using the proposed method, it is possible to detect the open-switch fault and identify the faulty switch within two fundamental periods, without using additional sensors or performing complex calculations. Simulations and experiments are carried out to confirm the reliability of the proposed fault-detection method.
Challenges of measuring the complex permittivity and permeability of thin materials in millimeter wave regimes (140GHz–220GHz)

The broad range of applications to science prescribes the need for the complex permittivity (εr=ε'-jε") and permeability (μr=/μ'-jμ") of many emerging materials. Unfortunately, due to the strong absorption across the entire microwave and millimeter wave spectrum there are gaps in available permittivity data for many materials over the millimeter-wave regimes. Here two attempts are made to fill a portion of the gap in the millimeter-wave range using a rectangular waveguide method that exploits S-parameters to extract the permittivity and permeability of thin CNT film and lipid by using the Nicolson-Ross-Weir (NRW) method. The limitation of standard NRW method over this frequency range is also presented and discussed.
A control strategy to compensate for current and voltage measurement errors in three-phase PWM rectifiers

This study proposes a compensation strategy to deal with both current and voltage measurement errors in the three-phase PWM rectifier system. The DC offset and scaling errors in the voltage and current measurements cause the injection of undesired DC and unbalanced currents into the three-phase input current and subsequently lead to voltage ripple at the DC output voltage. This paper proposes a compensation scheme for current measurement error where the DC offset and scaling errors in the current measurement are estimated from the characteristic of the DC output voltage ripple combining with simple band-pass and low-pass filters. Meanwhile, an advanced current controller designed with a proportional integral plus two resonant controllers tuned at the fundamental grid frequency (ωs) and 2ωs in the synchronous (d-q) reference frame is suggested to reject the impact of the DC offset and scaling errors in the voltage measurement. The proposed compensation method is developed without the need of extra hardware circuit, sensor, or precise information of system parameters so that it can be considered as more cost effective and robust solution. The effectiveness of the proposed solution is verified by experimental results.
A new geometric algorithm to generate smooth interpolating curves on Riemannian manifolds

This paper presents a new geometric algorithm to construct a C smooth spline curve that interpolates a given set of data (points and velocities) on a complete Riemannian manifold. Although based on a modification of the de Casteljau procedure, our algorithm is implemented in three steps only independently of the required degree of smoothness, and therefore introduces a significant reduction in complexity. The key role is played by the choice of an appropriate smoothing function which is defined as soon as the degree of smoothness is fixed.
Association of DnaK and GroEL with Antimicrobial Resistance in Salmonella Abortusovis

Multidrug-resistant (MDR) strains of Salmonella are now encountered frequently and the rates of multidrug-resistance have increased considerably in recent years. The association of DnaK and GroEL molecular chaperones with the stress response induced by antibiotics has been mentioned for the most frequently isolated serovar, S. enterica subsp. enterica Typhimurium, but similar studies on S. Abortusovis were not published, so far. In the present work, the induction of DnaK and GroEL in S. Abortusovis cells under stress conditions caused by heat shock and by various antibiotics respectively was studied by Western blot and real time RT-PCR methods. The transcription and translation analyses showed increased levels of DnaK and GroEL after a temperature shift from 37 °C to 42 °C, and after the exposure of a multiresistant S. Abortusovis strain to subinhibitory concentrations of various antimicrobials (nalidixic acid, streptomycin, kanamycin, tetracycline and gentamicin). The data presented here may provide a starting point for future research regarding the role of S. Abortusovis molecular chaperones in the stress response induced by antibiotics.
Friction Variability in Planar Pushing Data: Anisotropic Friction and Data-Collection Bias

Friction plays a key role in manipulating objects. Most of what we do with our hands, and the most of what robots do with their grippers, is based on the ability to control frictional forces. This letter aims to better understand the variability and predictability of planar friction. In particular, we focus on the analysis of a recent dataset on planar pushing by [K. -T. Yu, M. Bauza, N. Fazeli, and A. Rodriguez, More than a Million Ways to Be Pushed: A High-Fidelity Experimental Data Set of Planar Pushing, in Proceeding of the IEEE/RSJ Internatinonal Conference on Intelligent Robots and Systems, 2016, pp. 30–37. ] devised to create a data-driven footprint of planar friction. We show in this letter how we can explain a significant fraction of the observed unconventional phenomena, e.g., stochasticity and multimodality, by combining the effects of material nonhomogeneity, anisotropy of friction and biases due to data collection dynamics, hinting that the variability is explainable but inevitable in practice. We introduce an anisotropic friction model and conduct simulation experiments comparing with more standard isotropic friction models. The anisotropic friction between the object and supporting surface results in convergence of initial condition during the automated data collection. Numerical results confirm that the anisotropic friction model explains the bias in the dataset and the apparent stochasticity in the outcome of a push. The fact that the data collection process itself can originate biases in the collected datasets, resulting in deterioration of trained models, calls attention to the data collection dynamics.
Enhancement of cisplatin cytotoxicity by Retigeric acid B involves blocking DNA repair and activating DR5 in prostate cancer cells

Retigeric acid B (RAB), a natural compound isolated from lichen, has been demonstrated to inhibit cell growth and promote apoptosis in prostate cancer (PCa) cells. The present study evaluated the function of RAB combined with clinical chemotherapeutic drugs in PCa cell lines by MTT assay, reverse transcription quantitative polymerase chain reaction and western blot analysis, and identified that RAB at low doses produced significant synergistic cytotoxicity in combination with cisplatin (CDDP); however, no marked synergism between RAB and the other chemotherapeutics was observed. Additional studies revealed that RAB exerted an inhibitory effect on DNA damage repair pathways, including the nucleotide excision repair and mismatch repair pathways, which are involved in the sensitivity to CDDP-based chemotherapy, as suggested by the significantly downregulated expression of certain associated repair proteins. Notably, Excision repair cross-complementing 1, a critical gene in the nucleotide excision repair pathway, exhibited the most significant decrease. When combined with CDDP, RAB-mediated impairment of DNA repair resulted in prolonged DNA damage, as demonstrated by the long-lasting appearance of phosphorylation of histone H2AX at Ser139, which potentially enhanced the chemosensitivity to CDDP. Concurrently, the proapoptotic protein death receptor 5 (DR5) was activated by RAB, which also enhanced the chemotherapeutic response of CDDP. Knockdown of DR5 partially blocked RAB-CDDP synergism, suggesting the crucial involvement of DR5 in this event. The results of the present study identified that RAB functioned synergistically with CDDP to increase the efficacy of CDDP by inhibiting DNA damage repair and activating DR5, suggesting the mechanistic basis for the antitumor effect of RAB in combination with current chemotherapeutics.
Use and imaging performance of CMOS flat panel imager with LiF/ZnS(Ag) and Gadox scintillation screens for neutron radiography

In digital neutron radiography system, a thermal neutron imaging detector based on neutron-sensitive scintillating screens with CMOS(complementary metal oxide semiconductor) flat panel imager is introduced for non-destructive testing (NDT) application. Recently, large area CMOS APS (active-pixel sensor) in conjunction with scintillation films has been widely used in many digital X-ray imaging applications. Instead of typical imaging detectors such as image plates, cooled-CCD cameras and amorphous silicon flat panel detectors in combination with scintillation screens, we tried to apply a scintillator-based CMOS APS to neutron imaging detection systems for high resolution neutron radiography. In this work, two major Gd2O2S:Tb and 6LiF/ZnS:Ag scintillation screens with various thickness were fabricated by a screen printing method. These neutron converter screens consist of a dispersion of Gd2O2S:Tb and 6LiF/ZnS:Ag scintillating particles in acrylic binder. These scintillating screens coupled-CMOS flat panel imager with 25x50mm2 active area and 48μm pixel pitch was used for neutron radiography. Thermal neutron flux with 6x106n/cm2/s was utilized at the NRF facility of HANARO in KAERI. The neutron imaging characterization of the used detector was investigated in terms of relative light output, linearity and spatial resolution in detail. The experimental results of scintillating screen-based CMOS flat panel detectors demonstrate possibility of high sensitive and high spatial resolution imaging in neutron radiography system.
Study on Customer Loyalty and Influential Factors in Mobile Telecommunications

Customer loyalty is very important to telecommunication operators, and this paper intends to find out the influential factors of customer loyalty for mobile services. The paper first clarifies the meanings of customer behavioral loyalty and attitudinal loyalty, and analyzes the main driving factors of customer loyalty. It then constructs an effective mechanism model for customer loyalty programs, and by empirical analysis, finds out the relationships between customer loyalty and factors such as customer satisfaction, switching costs, and relationship trust.