Miracle-dz/UniFAR-FTUs huggingface dataset:
Experimental evidence on partitioning in parallel data warehouses

Parallelism can be used for major performance improvement in large Data warehouses (DW) with performance and scalability challenges. A simple low-cost shared-nothing architecture with horizontally fully-partitioned facts can be used to speedup response time of the data warehouse significantly. However, extra overheads related to processing large replicated relations and repartitioning requirements between nodes can significantly degrade speedup performance for many query patterns if special care is not taken during placement to minimize such overheads. In this paper we show these problems experimentally with the help of the performance evaluation benchmark TPC-H and identify simple modifications that can minimize such undesirable extra overheads. We analyze experimentally a simple and easy-to-apply partitioning and placement decision that achieves good performance improvement results.
An alternative technique for populating Thai tourism ontology from texts based on machine learning

This paper proposes an alternative technique to perform ontology population by using natural language processing and machine learning techniques. This study conceptually considers the population task as classifying terms into ontological subcategories. The proposed technique adopts the recognition method named Conditional Random Fields (CRFs) to identify boundary of instances and define types of subconcepts to generate relationships between instance-of and related concept. Also, the lexico-syntactic pattern is used to identify the relationships between instances. The experiments are conducted on Thai language documents in the tourism domain. The experimental results showed that the instances extraction step provided 77.62% and 70.87% of precision and recall measures, respectively, and relationships extraction step yielded 82.67% and 72.61% of recall measures.
Do additional objectives make a problem harder?

In this paper, we examine how adding objectives to a given optimization problem affects the computation effort required to generate the set of Pareto-optimal solutions. Experimental studies show that additional objectives may change the runtime behavior of an algorithm drastically. Often it is assumed that more objectives make a problem harder as the number of different trade-offs may increase with the problem dimension. We show that additional objectives, however, may be both beneficial and obstructive depending on the chosen objective. Our results are obtained by rigorous runtime analyses that show the different effects of adding objectives to a well-known plateau-function.
Study of physio-mechanical properties of high density polyethylene (HDPE) - palm kernel nut shell (Elaeis guineasis) composites

The major objective of this work is to determine the physio-mechanical properties of the proposed polymer composite which is a combination of two distinct materials: HDPE and palm kernel nut shell particulate. The materials compounding and sample formation was done using Reliable Two Roll Mill Model 5183 and Carvers Hydraulic Hot Press. Two composite systems were fabricated. Tensile strength of the fabricated composites was tested using standard equipment in accordance to the ASTM standard specifications; Advanced Material Testing Machine, Resil Tensile-impactor and Quanta 200 Environmental Electron Scanning Microscope. Percentage water absorption of the composite was also investigated. The results obtained showed that tensile properties changed with the filler content. The tensile strength first increased with increase in filler content. At a higher filler load the tensile strength dropped. Composite hardness and % water absorption increased with increase in filler content. Environmental Scanning Electron Microscope (ESEM) showed good filler-matrix interaction. The results obtained showed matrix-filler compatibility especially for the sodium hydroxide treated filler.
A fair admission control scheme for multimedia wireless network

CAC (call admission control) scheme plays an important role in the QoS guarantee of wireless multimedia network. Lots of CAC schemes aim to satisfy QoS requirement and upgrade network utilization, but they ignore the fairness principle in network. Directly and simply using these schemes, it will appear the phenomenon of unbalance that the narrow band calls block the broad band calls. The common method used to resolve fair problem is resource reservation method, but it will decrease the network utilization. So, this paper proposes a novel fair call admission control scheme. Differing from resource reservation method, the new scheme introduces call hold control method to overcome unfair problem between narrow band calls and broad band calls. Numerical results show that the new scheme effectively improves network utilization and decreases CBP (call blocking probability) especially when the network carries heavy traffic load. Simulation results also show that the average waiting time of users is much less than their waiting time thresholds and users could receive the service in a short waiting time.
Kinetics and Mass Transfer of Fixed Bed Photoreactor Using N-doped Tio2 Thin Film for Tannery Wastewater under Visible Light

A fixed bed photocatalytic reactor with N-doped TiO2 thin film coated on stainless steel plate was conducted for tannery wastewater treatment under visible light irradiation. The photocatalytic efficiency was evaluated on a basis of changes on concentration of total chromium (Cr) and total organic carbon (TOC). Kinetics and mass transfer were determined from change of flow rate and the hydraulic retention time of wastewater in photoreactor. The photocatalytic reduction of total Cr followed pseudo-first order model with variation of feed concentration. The optimum flow rate in total Cr removal was found at 750 mLmin -1 with 1.20 mgL -1 min -1 initial reaction rate and 0.0452 min -1 kinetic rate constant. With the high flow rate (>750 mLmin -1 ); both overall rate constant and photocatalytic efficiency was decreased. In the testing of photostability of the N-doped TiO2 thin film in fixed bed photoreactor, the slight decrease of photocatalytic activity in total Cr and TOC removal after 6 cycles of tannery wastewater treatment was in an acceptable range which suggested that the photocatalyst can be successfully reused in wastewater applications.
Correct Alignment of a Return-Address-Stack after Call and Return Mispredictions

It is accepted that the alignment of a return-addressstack can be preserved by checkpointing on branches and recovering on branch mispredictions the top-ofstack pointer. However, virtually all published literature, is vague or proposes sub-optimal algorithms on how to repair the alignment of a return-address-stack on call and return mispredictions. Possible manifestations of this ambiguity are lower performing implementations of return-address-stack mechanisms in processors and simulators. This paper suggests that on call and return mispredictions the recovered top-of-stack pointer should point to the next and previous stack position respectively relative to the checkpointed top-ofstack pointer. It is established experimentally that the proposed method can improve the performance, over an otherwise identical processor configuration, on the average by 2% and by as much as 10%. This corresponds to a drop in return-address mispredictions by 40%, from 11.3% downto 6.7%. This work also considers whether the performance of one of the best known return-address-stack methods, proposed several years ago, is satisfactory with increasing pipeline depth. The results show that the average performance of the method is still satisfactory, but for some benchmarks appears insufficient. This may suggest a need for better returnaddress predictors.
Design and Characterization of Amoxicillin trihydrate Mucoadhesive Microspheres for Prolonged Gastric retention

Whilst there is keen interest in developing improved drug delivery systems to gastro intestinal tract for treatment of Helicobacter pylori induced peptic and duodenal ulcers, In an effort to augment the anti-Helicobacter pylori effect of Amoxicillin trihydrate mucoadhesive microspheres, which have the ability to reside in the gastrointestinal tract for an extended period, were prepared with ethyl cellulose as a matrix and carbopol 934P as a mucoadhesive polymer. Particle size was determined by optical micrometer and average particle size was found in the range of 500-560 m for all batches. All the batches showed good in vitro mucoadhesive property. Cumulative percent drug release was found to be maximum for FI (91.12 %). Formulation FII found to follow Higuchi matrix with the regression value of 0.9985. Form the all batches FI formulated microspheres showed more mucoadhesive property due to less amount of ethyl cellulose. In conclusion, the prolonged gastrointestinal residence time and controlled release might make contribution to H. Pylori clearance.
Synchronizing Gestures with Friction Sounds: Work in Progress

This paper presents a work in progress dealing with the sensorimotor relation between auditory perception and graphical movements. An experiment where subjects were asked to synchronize their gestures with synthetic friction sounds is presented. A first qualitative analysis enabled to evaluate the influence of different intrinsic sound parameters on the characteristics of the synchronized gesture. This preliminary experiment provides a formal framework for a wider study which aims to evaluate the relation between audition, vision and gestures.
Cases report: Experience with rheolytic thrombectomy device (Angiojet) in acute ST elevation myocardial infarction with large amount of coronary thrombus.

BACKGROUND Primary percutaneous coronary intervention (PCI) in acute ST elevation myocardial infarction (STEMI) is a clinical challenge. Adequate thrombus removal before stenting is an important factor that predicts procedural success, and finally reflects to clinical outcomes. CASES REPORT In the present report, 2 cases of acute STEMI underwent primary PCI. Coronary angiogram (CAG) in both cases showed a large amount of coronary thrombus (TIMI thrombus grade 4 & grade 5), with no response to several attempts of manual aspiration with thrombus aspiration catheter Then, Angiojet rheolytic thrombectomy, a catheter-based, device was used antegradely. Repeated CA G showed thrombus was significantly eliminated. Both patients were successfully stented with direct stent technique at culprit arteries, resulted in good angiographic results and inhospital outcomes. CONCLUSION Angiojet, a rheolytic thrombectomy device, is a viable option to remove thrombus in primary PCI, especially in cases with massive thrombus load and failed manual aspiration.
Estimation of ash injection in the atmosphere by basaltic volcanic plumes: The case of the Eyjafjallajökull 2010 eruption

[1] During explosive eruptions, volcanic plumes inject ash into the atmosphere and may severely affect air traffic, as illustrated by the 2010 Eyjafjallajokull eruption. Quantitative estimates of ash injection can be deduced from the height reached by the volcanic plume on the basis of scaling laws inferred from models of powerful Plinian plumes. In less explosive basaltic eruptions, there is a partitioning of the magma influx between the atmospheric plume and an effusive lava flow on the ground. We link the height reached by the volcanic plume with the rate of ash injection in the atmosphere via a refined plume model that (1) includes a recently developed variable entrainment law and (2) accounts for mass partitioning between ground flow and plume. We compute the time evolution of the rate of injection of ash into the atmosphere for the Eyjafjallajokull eruption on the basis of satellite thermal images and plume heights and use the dispersion model of the Volcanic Ash Advisory Center of Toulouse to translate these numbers into hazard maps. The classical Plinian model would have overestimated ash injection by about 20% relative to the refined estimate, which does not jeopardize risk assessment. This small error was linked to effective fragmentation by intense interactions of magma with water derived from melting of ice and hence strong mass partitioning into the plume. For a less well fragmented basaltic dry eruption, the error may reach 1 order of magnitude and hence undermine the prediction of ash dispersion, which demonstrates the need to monitor both plume heights and ground flows during an explosive eruption.
Factors associated with overweight and central adiposity in urban workers covered by the Workers Food Program of the Brazilian Amazon Region.

OBJECTIVE To investigate factors associated with overweight and abdominal obesity in male and female workers. METHODS This is a cross-sectional population-based study. A representative sample of 1,054 workers ranging from 18 to 74 years of age, selected among individuals covered by the Workers´ Food Program living in the Metropolitan region of Belém, Northern Brazil. Health-related behavior and anthropometry were assessed. Fasting blood samples were collected. RESULTS Overweight prevalence was 38.0% among women and 50.4% among men. Among overweight subjects, there were 6.1% obese women and 10.7% obese men. Multivariate analysis was used to identify social behavior and clinical-biochemical factors associated with increased body adiposity (BMI > 25 kg/m² and increased waist circumference: > 80 cm for women and > 94 cm for men). Variables positively and significantly associated with overweight and abdominal obesity in men according to prevalence ratio (PR) values were: age (1.02), high family income (1.05), smoking (1.36), hypertension (systolic blood pressure, 1.41; diastolic blood pressure, 1.85) and hypertriglyceridemia (2.29). In women, the PR of increased body adiposity was associated with: age (1.02), alcohol intake (1.42), hypertriglyceridemia (1.44), diastolic blood pressure (1.65) and hyperglycemia (1.71). CONCLUSIONS The association of overweight and abdominal obesity with social behavior variables should be corrected with preventive and educational measures. Furthermore, association of overweight and abdominal obesity with clinical and biochemical variables places the urban workers from the Amazon region assisted by the Workers´ Food Program at a possible risk for morbidity and mortality from increased body adiposity.
Genetic control of fungal differentiation: The three sporulation pathways of Neurospora crassa

Sporulation in the mold Neurospora crussa can proceed along three very different pathways, leading to the production of three types of spores. Two asexual sporulation pathways that lead to the formation of macroconidia and microconidia involve budding from hyphae by two different mechanisms. A much more complex sexual reproductive pathway involves the formation of a fruiting body called a perithecium, in which meiosis takes place and ascospores are formed in sac‐like cells called asci. Numerous mutations exist that affect these developmental pathways, and genes have been isolated that are expressed preferentially during sporulation. The Neurospora sporulation pathways offer a simple system with which to study mechanisms and regulation of development that are usually obscured by complex cell‐cell interactions involved in animal and plant development.
Neural Stem Cell Plasticity: Advantages in Therapy for the Injured Central Nervous System

The physiological and pathological properties of the neural germinal stem cell niche have been well-studied in the past 30 years, mainly in animals and within given limits in humans, and knowledge is available for the cyto-architectonic structure, the cellular components, the timing of development and the energetic maintenance of the niche, as well as for the therapeutic potential and the cross talk between neural and immune cells. In recent years we have gained detailed understanding of the potentiality of neural stem cells (NSCs), although we are only beginning to understand their molecular, metabolic, and epigenetic profile in physiopathology and, further, more can be invested to measure quantitatively the activity of those cells, to model in vitro their therapeutic responses or to predict interactions in silico. Information in this direction has been put forward for other organs but is still limited in the complex and very less accessible context of the brain. A comprehensive understanding of the behavior of endogenous NSCs will help to tune or model them toward a desired response in order to treat complex neurodegenerative diseases. NSCs have the ability to modulate multiple cellular functions and exploiting their plasticity might make them into potent and versatile cellular drugs.
Real-time human motion analysis by image skeletonization

In this paper a process is described for analysing the motion of a human target in a video stream. Moving targets are detected and their boundaries extracted. From these, a "star" skeleton is produced. Two motion cues are determined from this skeletonization: body posture, and cyclic motion of skeleton segments. These cues are used to determine human activities such as walking or running, and even potentially, the target's gait. Unlike other methods, this does not require an a priori human model, or a large number of "pixels on target". Furthermore, it is computationally inexpensive, and thus ideal for real-world video applications such as outdoor video surveillance.
Improved degraded document recognition with hybrid modeling techniques and character n-grams

A robust multifont character recognition system for degraded documents, such as photocopy or fax, is described. The system is based on hidden Markov models using discrete and hybrid modeling techniques, where the latter makes use of an information theory-based neural network. The presented recognition results refer to the SEDAL-database of English documents using no dictionary. It is also demonstrated that the usage of a language model that consists of character n-grams yields significantly better recognition results. Our resulting system clearly outperforms commercial systems and leads to further error rate reductions compared to previous results reached on this database.
How to cluster gene expression dynamics in response to environmental signals

Organisms usually cope with change in the environment by altering the dynamic trajectory of gene expression to adjust the complement of active proteins. The identification of particular sets of genes whose expression is adaptive in response to environmental changes helps to understand the mechanistic base of gene-environment interactions essential for organismic development. We describe a computational framework for clustering the dynamics of gene expression in distinct environments through Gaussian mixture fitting to the expression data measured at a set of discrete time points. We outline a number of quantitative testable hypotheses about the patterns of dynamic gene expression in changing environments and gene-environment interactions causing developmental differentiation. The future directions of gene clustering in terms of incorporations of the latest biological discoveries and statistical innovations are discussed. We provide a set of computational tools that are applicable to modeling and analysis of dynamic gene expression data measured in multiple environments.
Interaction of the heterozygous nude gene with the asplenia trait in mammary tumorigenesis

The BALB/c mouse strain has been shown to contain endogenous mouse mammary tumor virus (MMTV) proviral sequences. However, no exogenous MMTV particles have been detected in their tissues. Female BALB/c mice from our colonies exhibit a very low incidence of spontaneous mammary tumors (SMT); less than 1% at up to 20 mo of age. Immunodeficient BALB/c mice heterozygous for the nude gene (nu/+, +/+), for the dominant hemimelia gene associated with asplenia (+/+, Dh/+), or for both traits (nu/+, Dh/+) have been examined for SMT incidence and the presence of MMTV proviruses. Based on restriction digestion with Eco RI, Bam HI, and Pst I, the immunodeficient mice have an MMTV provirus copy number and organization identical to the BALB/cCrgl strain. This MMTV DNA pattern is distinct from the MMTV proviruses in C3H/He, C57BL/6J and CBA/CaJ mice, which were parental strains of the immunodeficient mutants. Normal female BALB/c or BALB/c heterozygous for the asplenic trait do not develop significant numbers of SMT at up to 19 mo of age. In contrast, an incidence of 23.8% and 57.7% SMT was observed in BALB/c nu/+ heterozygotes, and in BALB/c nu/+, Dh/+ heterozygotes, respectively. These results indicate that agenesis of the spleen, concomitant with the presence of the heterozygous nude gene, contribute to a high incidence of SMT in the low-SMT BALB/c mouse strain.
On Threshold Selection for Principal Component Based Network Anomaly Detection

Principal component based anomaly detection has emerged as an important statistical tool for network anomaly detection. It works by projecting summary network information onto a signal and noise sub-spaces and detecting anomalies in the noise sub-space. Recently some major problems where detected with this network anomaly approach. The chief among the problems is the difficulty in selecting a threshold used to declare that the energy in the noise sub-space contains a network anomaly. We show that the reason for this problem is that some of the assumption previously used to select the threshold, namely that the traffic follows a Normal distribution, do not fit the reality of the available network traces. Then, we show that the energy in the noise sub-space can be modeled with the long-tailed Cauchy distribution and use this approximation to calculate reliable thresholds. Our analysis of network traces indicates that the Cauchy distribution approximation of the energy distribution should significantly lower the false alarm rate.
A Cross Layer Framework Design for transport of Video over Wireless Networks

— To maximize end user satisfaction, Wireless multimedia application needs the communication networks to allocate resources dynamically. Cross layer framework design offers a solution to this problem. In this paper, a cross layer framework design strategy optimizes the application, physical and MAC layers jointly for video streaming. An efficient FEC mechanism to combat channel errors is chosen based on the channel condition. The optimization is done to maximize the average PSNR of the received video signal.
Membrane microchannel made of collagen with self-assembled micro fibril structures for tissue engineering

This paper describes a new strategy for regeneration of thick tissues in vitro by inserting artificial capillary network sheets made of vitrified collagen membrane between cell layers. The membrane microchannel sheet was fabricated by drying collagen gel on a template under centrifugal force. After sealing with another membrane, φ100μm microchannels made of 3μm-thick vitrified collagen membrane were successfully fabricated. Since the process did not require chemical crosslinking or heating above denaturation temperature, the fabricated structure keeps natural collagen fibrils. The cyto-compatibility of the structure was confirmed by culturing HUVEC on the membrane.