Miracle-dz/UniFAR-FTUs huggingface dataset:
Numerical Studies On Unsteady Helicopter Main-Rotor-Hub Assembly Wake

Article history: Received 13 March 2018 Received in revised form 13 May 2018 Accepted 9 July 2018 Available online 23 July 2018 The objective of this research is to quantify viscous unsteady flow phenomenon observed behind a helicopter main-rotor-hub assembly, as the part is believed to be a major contributor to tail shake phenomenon. In this numerical investigation, the aerodynamic flow field was computed using Large Eddy Simulation equations. To simulate the wake dynamics, Multiple Reference Frames (MRF) method was applied to rotate the main-rotor-hub assembly. Simulations were also run with fairing installed on the main-rotor-hub assembly. The results concluded that fairing does significantly alter the wake’s structures and help to reduce aerodynamic drag to about 5% lesser. In addition, analysis from power spectral density (PSD) had successfully quantified the frequencies of this unsteady wake, as well the strength of their amplitudes. It had also manifested a significant growth of wake amplitude to 109% when the rotor rotation was increased from 1400 rpm to 1600 rpm, implying a strong correlation between the flow unsteadiness and the speed of rotor rotation. These findings are alleged to be valuable for future research and development in the rotorcraft industry.
Circulating CD34+/133+ progenitor cells in patients with stable angina pectoris undergoing percutaneous coronary intervention.

BACKGROUND This study explored the clinical significance of CD34(+)/133(+) circulating progenitor cell (CPC) counts in patients with stable angina pectoris (AP) who underwent percutaneous coronary intervention (PCI). METHODS AND RESULTS Subjects comprised 52 patients with stable AP requiring PCI and 50 control patients without AP. In the AP group, blood samples were taken before and 20 min and 24 h after PCI to measure CPC counts by fluorescence-activated cell sorter analysis. The baseline number of CPCs was smaller in the AP group than in controls. In the AP group, body mass index (BMI) correlated positively with the baseline number of CPCs and was an independent predictor of CPC count in multivariate regression analysis. Other conventional risk factors, daily exercise activity and statin administration showed no association with CPC count. CPC counts remained unchanged within 24 h after PCI. CONCLUSIONS CPC counts in patients with AP are influenced by BMI, but not by other coronary risk factors. CPC counts remain unchanged within 24 h after PCI.
Simulation of a syngas from a coal production plant coupled to a high temperature nuclear reactor

In light of the rapid depletion of the world’s oil reserves, concerns about energy security prompted the exploration of alternative sources of liquid fuels for transportation. One such alternative is the production of synthetic fuel using an indirect coal liquefaction process or coal-to-liquids (CTL) process. In this process, coal is gasified in a gasifier in the presence of steam and oxygen to produce a synthesis gas or syngas consisting mainly of hydrogen and carbon monoxide. The syngas is then converted to liquid fuels and a variety of useful chemicals in a Fischer Tropsch-type synthesis reactor. However, the traditional process for syngas production also produces substantial amounts of carbon dioxide. In fact, only about one third of the carbon in the coal feedstock ends up in the liquid fuel product using traditional CTL technology. If more hydrogen was available than the hydrogen produced during the gasification step, the carbon utilisation of the process could be improved significantly. The high temperature reactor (HTR) is a gas cooled Generation IV nuclear reactor ideally suited to provide power and high temperature heat for carbon neutral production of hydrogen via high temperature electrolysis. The integration of an HTR into a CTL process therefore provides an opportunity to improve the thermal and carbon efficiency of the CTL process significantly. This paper presents a possible process flow scheme for a nuclear assisted CTL process. The system is evaluated in terms of its thermal or syngas production efficiency (defined as the ratio of the heating value of the produced syngas to the sum of the heating value of the coal plus the HTR heat input) as well as its carbon utilisation. If the hydrogen production plant is sized to produce only enough associated oxygen to supply the needs of the gasification plant, syngas is produced at about 63% thermal efficiency, while 71.5% of the carbon is utilised in this process. It was found that the optimum HTR outlet temperature to produce hydrogen with a high temperature steam electrolysis process is 850°C. If enough process heat and power are available and process equipment capacities are sufficient, the carbon utilisation of the process could be improved even further to values in excess of 90%.
UTILIZATION OF RICE STRAW FOR FEEDING RUMINANTS: 3-COMPARATIVE STUDIES BETWEEN CORN STALKS AND GREEN RICE STRAW SILAGE DURING SUMMER FEEDING

Two comparative studies between green corn stalks silage (CSS) and green rice straw silage (RSS) were conducted. The 1 st one was to evaluate the nutritional values of both kinds of silages using 6 adult rams in two digestion trials (3 in each). The other comparative study was carried out in summer season using swing-over method to investigate productive performance of lactating buffaloes which fed rations containing either green corn stalks or rice straw silages. Eight lactating buffaloes average 500-600 kg body weight at 2nd to 5th parities were used after 8 weeks of calving. Animals were fed three tested rations, the control (CR) represented traditional summer rations which composed of 53% concentrate feed mixture (CFM), 20% berseem hay (BH) 27% rice straw (RS) and the 1st tested ration (TR1) contained 42% CFM, 43% RSS and 15% BH, while the 2nd tested ration (TR2) was CFM, CSS and BH to supply 42, 43 and 15% of the daily DM intake, respectively. The impact of ensiled corn stalks and rice straw and their utilization for animal feeding per feddan was also investigated. The two tested silages had a good fermentation quality as low values of pH, NH 3 -N (%of total N) and normal concentration of VFA's. Corn stalks silage (CSS) had a higher nutritive values as TDN%, DE and DCP%, compared to green rice straw silage (RSS). Single crossbred of maize crop
Elucidation of Pyrene Degradation Pathway in Bacteria

In the present investigation, degradation of a highly persistent PAH, pyrene (100 mg Kg-1) spiked in soil, was studied separately by three PAH degrading bacteria. The results revealed that BP10 could degrade a maximum of 96% of pyrene, followed by P2 (80%) and the least was recorded in PSM11 after 14 days of incubation period. These bacterial strains were also found to produce different types of biosurfactants. Glycolipid was produced by BP10 and PSM11, while P2 produced proteolipid. Although the biosurfactant produced by BP10 and PSM11 was the same, but its emulsification index in benzene and desorption efficiency for pyrene from soil were found higher in BP10 than PSM11. Based on 2D analysis of proteins in BP10, several proteins were found upregulated indicating their direct or indirect role in pyrene degradation. Besides, two new proteins i.e. aldehyde dehydrogenase family protein and isocitrate lyase were also synthesized during pyrene degradation. BP10 followed a single pathway of pyrene degradation mediated through formation of 2-carboxybenzaldehyde, ortho phthalic acid and catechol as intermediates.
A Dynamic Approach to the Theory of Effective Demand

ABSTRACT This paper attempts to resituate the theory of effective demand within a dynamic nonequilibrium context. Existing theories of effective demand, which derive from the works of Keynes and Kalecki, are generally posed in state equilibrium terms. That is to say, they serve to define a given level of output which corresponds to the equilibrium point between aggregate demand and supply. We propose to generalize this analysis in three ways. First, we will extend the analysis to encompass a dynamic (i.e. moving) short-run path of output, rather than a merely static level. Second, we will show that his dynamic short-run path need not imply an equilibrium analysis, since it can arise from either stochastically sustained cycles or deterministic limit cycles. And third, we will prove that the preceding generalization of the theory of effective demand will allow us to solve a long-standing problem in growth theory: namely the puzzle surrounding the apparently intractable instability of warranted growth. We will show that the actual path of growth does indeed gravitate around the warranted path in a cyclical sense.
Arctic Sea Ice Reemergence: The Role of Large-Scale Oceanic and Atmospheric Variability*

AbstractArctic sea ice reemergence is a phenomenon in which spring sea ice anomalies are positively correlated with fall anomalies, despite a loss of correlation over the intervening summer months. This work employs a novel data analysis algorithm for high-dimensional multivariate datasets, coupled nonlinear Laplacian spectral analysis (NLSA), to investigate the regional and temporal aspects of this reemergence phenomenon. Coupled NLSA modes of variability of sea ice concentration (SIC), sea surface temperature (SST), and sea level pressure (SLP) are studied in the Arctic sector of a comprehensive climate model and in observations. It is found that low-dimensional families of NLSA modes are able to efficiently reproduce the prominent lagged correlation features of the raw sea ice data. In both the model and observations, these families provide an SST–sea ice reemergence mechanism, in which melt season (spring) sea ice anomalies are imprinted as SST anomalies and stored over the summer months, allowing for.
Reach trajectories reveal delayed processing of low spatial frequency faces in developmental prosopagnosia

Developmental prosopagnosia (DP) is characterized by a selective deficit in face recognition despite normal cognitive and neurological functioning. Previous research has established configural processing deficits in DP subjects. Low spatial frequency (LSF) information subserves configural face processing. Using hybrid stimuli, here we examined the evolution of perceptual dynamics and integration of LSF information by DP subjects while they pointed to high spatial frequency (HSF) face targets. Permutation analysis revealed a 230-ms delay in LSF processing by DP subjects as compared to controls. This delayed processing is likely to contribute to the difficulties associated with face recognition in DP subjects and is reflective of their alleged reliance on local rather than global features in face perception. These results suggest that quick and efficient processing of LSF information is critical for the development of normal face perception.
Increased Expression of PcG Protein YY1 Negatively Regulates B Cell Development while Allowing Accumulation of Myeloid Cells and LT-HSC Cells

Ying Yang 1 (YY1) is a multifunctional Polycomb Group (PcG) transcription factor that binds to multiple enhancer binding sites in the immunoglobulin (Ig) loci and plays vital roles in early B cell development. PcG proteins have important functions in hematopoietic stem cell renewal and YY1 is the only mammalian PcG protein with DNA binding specificity. Conditional knock-out of YY1 in the mouse B cell lineage results in arrest at the pro-B cell stage, and dosage effects have been observed at various YY1 expression levels. To investigate the impact of elevated YY1 expression on hematopoetic development, we utilized a mouse in vivo bone marrow reconstitution system. We found that mouse bone marrow cells expressing elevated levels of YY1 exhibited a selective disadvantage as they progressed from hematopoietic stem/progenitor cells to pro-B, pre-B, immature B and re-circulating B cell stages, but no disadvantage of YY1 over-expression was observed in myeloid lineage cells. Furthermore, mouse bone marrow cells expressing elevated levels of YY1 displayed enrichment for cells with surface markers characteristic of long-term hematopoietic stem cells (HSC). YY1 expression induced apoptosis in mouse B cell lines in vitro, and resulted in down-regulated expression of anti-apoptotic genes Bcl-xl and NFκB2, while no impact was observed in a mouse myeloid line. B cell apoptosis and LT-HSC enrichment induced by YY1 suggest that novel strategies to induce YY1 expression could have beneficial effects in the treatment of B lineage malignancies while preserving normal HSCs.
Specialized Motor-Driven dusp1 Expression in the Song Systems of Multiple Lineages of Vocal Learning Birds

Mechanisms for the evolution of convergent behavioral traits are largely unknown. Vocal learning is one such trait that evolved multiple times and is necessary in humans for the acquisition of spoken language. Among birds, vocal learning is evolved in songbirds, parrots, and hummingbirds. Each time similar forebrain song nuclei specialized for vocal learning and production have evolved. This finding led to the hypothesis that the behavioral and neuroanatomical convergences for vocal learning could be associated with molecular convergence. We previously found that the neural activity-induced gene dual specificity phosphatase 1 (dusp1) was up-regulated in non-vocal circuits, specifically in sensory-input neurons of the thalamus and telencephalon; however, dusp1 was not up-regulated in higher order sensory neurons or motor circuits. Here we show that song motor nuclei are an exception to this pattern. The song nuclei of species from all known vocal learning avian lineages showed motor-driven up-regulation of dusp1 expression induced by singing. There was no detectable motor-driven dusp1 expression throughout the rest of the forebrain after non-vocal motor performance. This pattern contrasts with expression of the commonly studied activity-induced gene egr1, which shows motor-driven expression in song nuclei induced by singing, but also motor-driven expression in adjacent brain regions after non-vocal motor behaviors. In the vocal non-learning avian species, we found no detectable vocalizing-driven dusp1 expression in the forebrain. These findings suggest that independent evolutions of neural systems for vocal learning were accompanied by selection for specialized motor-driven expression of the dusp1 gene in those circuits. This specialized expression of dusp1 could potentially lead to differential regulation of dusp1-modulated molecular cascades in vocal learning circuits.
Transplantation of hematopoietic stem cells in utero

Hematopoietic stem cell (HSC) transplantation in children and adults with congenital lymphohematopoietic disorders is limited by donor availability, graft failure, graft‐versus‐host disease (GVHD) and delayed immunological reconstitution. These problems may be circumvented by transplanting the patient before birth. Prenatal cellular therapy for the treatment of congenital diseases has tremendous theoretical appeal. Potential advantages of prenatal transplantation include: A) fetal immunologic immaturity and the potential for induction of donor‐specific tolerance; B) available space in the developing bone marrow for engraftment of donor cells; C) the sterile, protective, fetal environment which provides isolation from environmental pathogens, and D) prevention of clinical manifestations of the disease. Normal hematopoietic and immunologic development during ontogeny creates a “window of opportunity” during which events favor the engraftment of transplanted allogeneic (and xenogeneic) HSC and their proliferation. This is a period in which the fetus is immunologically naive and thus incapable of rejecting the foreign HSC, and the expanding bone marrow spaces allow homing and engraftment of HSC without the need for myeloablation. Experiments in sheep have established the optimal age of the recipient, route of donor cell administration, sources of HSC, and other parameters necessary for the successful engraftment and long‐term expression of donor HSC. In preclinical studies, transplantation of CD34‐enriched or highly purified populations of human adult bone marrow cells in utero resulted in the long‐term engraftment and expression of donor HSC without graft failure and GVHD. The strategies developed in allogeneic and xenogeneic fetal sheep models were used to successfully treat human fetuses with X‐linked recessive severe combined immunodeficiency. Stem Cells 1997; 15(suppl 1): 79–93
Report on the Development of the Advanced Encryption Standard (AES)

In 1997, the National Institute of Standards and Technology (NIST) initiated a process to select a symmetric-key encryption algorithm to be used to protect sensitive (unclassified) Federal information in furtherance of NIST’s statutory responsibilities. In 1998, NIST announced the acceptance of 15 candidate algorithms and requested the assistance of the cryptographic research community in analyzing the candidates. This analysis included an initial examination of the security and efficiency characteristics for each algorithm. NIST reviewed the results of this preliminary research and selected MARS, RC™, Rijndael, Serpent and Twofish as finalists. Having reviewed further public analysis of the finalists, NIST has decided to propose Rijndael as the Advanced Encryption Standard (AES). The research results and rationale for this selection are documented in this report.
VPN Analysis and New Perspective for Securing Voice over VPN Networks

Security and privacy become mandatory requirements for VoIP communications that needs security services such as confidentiality, integrity, authentication, non-replay and non- repudiation. The available solutions are generic and do not respect voice specificities and constraints. Thus, QoS of the voice is affected by delay, jitter, and packet loss. New security solutions must take into account the real-time constraint of voice service and their mechanisms should address possible attacks and overhead associated with it. Nowadays, VPNs (Virtual Private Networks) is considered the strongest security solutions for communications over IP networks. Most VPN solutions are implemented to tunnel data traffic while the trend toward a converged data and voice network, however, places new demands on VPNs to support real time traffic. In this paper we compare the VPN security protocols presenting their advantage and drawbacks. Then we present our new solution to secure voice over IPSec VPNs while guaranteeing the performance and quality of services, without reducing the effective bandwidth. We use the AVISPA model to analyze the security vulnerabilities of exchange messages to initiate session and establish VPN.
Peer Relationships in Undergraduates With ADHD Symptomatology: Selection and Quality of Friendships

Objective: This study investigated the relationships between ADHD symptomatology and friendship formation, social skills, and the quality of specific friendships in college students. Method: A total of 156 students, 75 of whom had high self-reported ADHD symptomatology, participated. Friends of 68 participants completed measures of friendship quality. Results: Students had more positive first impressions of and reported being friends with others whose ADHD symptom severity matched their own. Participants with high ADHD symptoms reported greater difficulty providing emotional support and managing interpersonal conflict than their low-symptom peers. Greater ADHD symptoms in participants and friends were related to reduced quality of specific relationships, but similarity of severity of symptomatology in the dyad benefited the relationship. Conclusion: These findings have implications for the kind of support offered to students with high ADHD symptomatology when they transition to college. Future longitudinal research examining relationships of varying levels of closeness should be conducted.
Analysis of Essential Oil from Teucrium maghrebinum Greuter et Burdet Growing Wild in Algeria

The chemical composition of the essential oil obtained from aerial parts of Teucrium maghrebinum growing wild in Algeria was analyzed by GC and GC-MS. Among the 66 identified compounds, δ-cadinene (12.7%), germacrene D (11.4%), γ-cadinene (9.5%) and 4-vinyl guaiacol (4.0%) were the most abundant. The oil is strongly characterized by the presence of sesquiterpenes (61.5%), particularly hydrocarbon sesquiterpenes (49.6%).
Timed Communicating Object Z

This paper describes a timed, multithreaded object modeling notation for specifying real-time, concurrent, and reactive systems. The notation Timed Communicating Object Z (TCOZ) builds on Object Z's strengths in modeling complex data and algorithms, and on Timed CSP's strengths in modeling process control and real-time interactions. TCOZ Is novel in that it includes timing primitives, properly separates process control and data/algorithm issues and supports the modeling of true multithreaded concurrency. TCOZ is particularly well-suited for specifying complex systems whose components have their own thread of control. The expressiveness of the notation is demonstrated by a case study in specifying a multilift system that operates in real-time.
IMPLICATION OF SAVINGS AND INVESTMENT ON ECONOMIC GROWTH IN NIGERIA.

There is large empirical literature which examines the implications of savings and investment on economic growth in Nigeria. However, little attention has been given to examining the implications of savings and investment on economic growth in Nigeria. The aim of this paper is to evaluate the implications of savings and investment on economic growth in Nigeria using ordinary least square regression. Results for ADF and PP unit root tests show that all variables under consideration are I(1). The study also revealed that there is long run relationship between savings, investment and economic growth in Nigeria. The result of the regression indicates that change in gross domestic savings movements has negative and significant effect on the change in economic growth in Nigeria and that the change in gross domestic investment has positive and significant effect on the change in the Nigerian economic growth. We therefore recommend that government should set a sound and fertile environment in order to foster domestic saving that will help to increase the level of economic growth in Nigeria. KEYWORDS: Savings, Investment, Economic Growth, ADF, PP.
3D PRINTING IN THE WILD: A PRELIMINARY INVESTIGATION OF AIR QUALITY IN COLLEGE MAKER SPACES

Additive manufacturing is a popular method for prototyping and manufacturing custom parts, especially on college campuses. While there is widespread use of 3D printers as part of many engineering classwork, there is little regulation or knowledge regarding emissions. Many plastics, including polycarbonates, ABS, and PLA are known to emit high counts of volatile organic compounds (VOCs) and particulate matters (PMs). This study focuses on VOC and PM counts in several natural environments and dedicated “maker spaces” on a large college campus to gauge the exposure that students and operators experience. Emissions were measured using a photoionization detector and two particle sizers. The photoionization detector measured total VOCs, and the particle size counters measured both total nanoparticles and individual microparticles based on relative particle diameter. Measurements were taken in hourly increments and then analyzed to determine the degree with which desktop printers emitted VOCs and PM. Our data can be used to determine whether additional ventilation or filtration is needed when 3D printing “in the wild” to enhance operator and bystander safety.