Miracle-dz/UniFAR-FTUs huggingface dataset:
Antenna selection in massive MIMO systems: Full-array selection or subarray selection?

This paper presents a concept of subarray antenna selection in massive MIMO systems, i.e., the whole antenna array is segmented into subarrays and only one antenna is selected in each subarray. The subarray antenna selection can reduce the hardware complexity of the RF switching network, but at the cost of performance degradation due to the introduced selection constraint. We evaluate such performance degradation not only with the ideal independent and identically distributed (i.i.d.) but also with the realistic measured channels. To serve our evaluation, an antenna selection algorithm based on branch and bound method is presented, which aims to select an optimal channel submatrix with the largest minimum singular value. A qualitative analysis is also given to compare the performance between the full-array and subarray selection. Simulation results show that the massive MIMO subarray antenna selection has close performance to the full-array antenna selection, no matter with the i.i. d. channels or the realistic channels. The results in this paper imply that the with the concept of subarray antenna selection, antenna selection is still a practical and promising technology in the realistic massive MIMO systems.
Critical Period Effects in Second Language Acquisition: The Effect of Written versus Auditory Materials on the Assessment of Grammatical Competence†

Current research has supported the existence of a critical period for the acquisition of the grammar of a second language. In one study, native speakers of Chinese and Korean, who had arrived in the U.S. at varying ages, were tested on their knowledge of English grammar using an auditory grammaticality judgment task (Johnson & Newport, 1989). Subjects were tested only after having lived in the U.S. for many years as students or academicians. The present study asks whether the poorer performance exhibited by the older arrivals was due to their difficulty with English grammar or merely due to extragrammatical properties associated with an auditory task. The same subjects who participated in the earlier study were tested a year later using an untimed written version of the same test. A strong negative correlation was still observed between age of arrival and performance on the written test: r=-. 54 for subjects of all ages of arrival; r=-. 73 for subjects who arrived to the U.S. before adulthood. Performance was higher on the written version than on the auditory version, but only for the older arrivals. The possibility that earlier formal classroom training boosted the adult arrivals’ performance on the written test is discussed.
Subgroup J Avian Leukosis Virus – Induced Histiocytic Sarcomatosis Occurs Only in Persistently Viremic but Not Immunotolerized Meat-type Chickens

The role of subgroup J avian leukosis virus (ALV J) infection profile in the development of histiocytic sarcomatosis (HS) in chickens was evaluated using retrospective analysis of 2 experiments involving in ovo and at-hatch inoculation of commercial meat-type and ADOL line 0 chickens with 100 or 10,000 TCID50 of various strains ALV J. HS was observed only in persistently viremic, meat-type chickens that were inoculated at hatch, but not in immunotolerized (persistently viremic, with no antibodies), in ovo inoculated chickens. However, the immunotolerized, in ovo inoculated chickens developed a high incidence of myeloid tumors. HS appeared to arise from the splenic ellipsoids and red pulp, and metastasized to liver, kidney, and other organs. The neoplastic cells were diffusely positive for ChL5, CD45, and MHC class II with multifocal infiltration of T and B lymphocytes. Expression of viral antigen gp85 within HS was very low compared with that noted in ALV J–induced myelocytomas. The above observations suggest that the mechanisms of oncogenesis of HS might be different from that of other ALV J–induced tumors.
Dietary quercetin potentiates the antiproliferative effect of interferon-α in hepatocellular carcinoma cells through activation of JAK/STAT pathway signaling by inhibition of SHP2 phosphatase

Type I interferons (IFN-α/β) have broad and potent immunoregulatory and antiproliferative activities, which are negatively regulated by Src homology domain 2 containing tyrosine phosphatase-2 (SHP-2). Inhibition of SHP2 by small molecules may be a new strategy to enhance the effcacy of type I IFNs. Using an in vitro screening assay for new inhibitors of SHP2 phosphatase, we found that quercetin was a potent inhibitor of SHP2. Computational modeling showed that quercetin exhibited an orientation favorable to nucleophilic attack in the phosphatase domain of SHP2. Quercetin enhanced the phosphorylation of signal transducer and activator of transcription proteins 1 (STAT1) and promoted endogenous IFN-α-regulated gene expression. Furthermore, quercetin also sensitized the antiproliferative effect of IFN-α on hepatocellular carcinoma HepG2 and Huh7 cells. The overexpression of SHP2 attenuated the effect of quercetin on IFN-α-stimulated STAT1 phosphorylation and antiproliferative effect, whereas the inhibition of SHP2 promoted the effect of quercetin on IFN-α-induced STAT1 phosphorylation and antiproliferative effect. The results suggested that quercetin potentiated the inhibitory effect of IFN-α on cancer cell proliferation through activation of JAK/STAT pathway signaling by inhibiting SHP2. Quercetin warrants further investigation as a novel therapeutic method to enhance the efficacy of IFN-α/β.
Do scopolamine and lorazepam have dissociable effects on human memory systems? A dose-response study with normal volunteers

Scopolamine (SP) and lorazepam have different pharmacological actions but exert very similar effects on people's performance on a wide range of cognitive and psychomotor tasks. Recent research suggests that their effects may be dissociable on perceptual priming. The present study compared the acute effects of SP (0.3 and 0.6 mg sc), lorazepam (1.0 and 2.0 mg orally), and placebo across the range of E. Tulving's memory ''systems'' (1985; E. Tulving & D. L. Schacter, 1990) and on indices of arousal and attention. The authors obtained a similar, dose-dependent time course of sedation and attentional impairment following active drugs. The effects of SP and lorazepam were qualitatively indistinguishable on tasks tapping working, episodic, semantic, and procedural memory. However, they had a differential effect on word-stem completion: Whereas SP did not affect this, lorazepam produced a deleterious effect that was not dose dependent. This difference between SP and lorazepam on word-stem completion appears to be over and above the drugs' effects on sedation and attention. The authors' findings are discussed in terms of possible distinct neurobiological systems mediating different memory systems.
Improved importance sampling for Monte Carlo simulation of time-domain optical coherence tomography

We developed an importance sampling based method that significantly speeds up the calculation of the diffusive reflectance due to ballistic and to quasi-ballistic components of photons scattered in turbid media: Class I diffusive reflectance. These components of scattered photons make up the signal in optical coherence tomography (OCT) imaging. We show that the use of this method reduces the computation time of this diffusive reflectance in time-domain OCT by up to three orders of magnitude when compared with standard Monte Carlo simulation. Our method does not produce a systematic bias in the statistical result that is typically observed in existing methods to speed up Monte Carlo simulations of light transport in tissue. This fast Monte Carlo calculation of the Class I diffusive reflectance can be used as a tool to further study the physical process governing OCT signals, e.g., obtain the statistics of the depth-scan, including the effects of multiple scattering of light, in OCT. This is an important prerequisite to future research to increase penetration depth and to improve image extraction in OCT.
Effects of temperature, amebic strain, and carbohydrates on Acanthamoeba adherence to corneal epithelium in vitro

An in vitro coincubation assay was used to measure adhesion of radiolabeled Acanthamoeba trophozoites to corneal epithelium. Adhesion of amebae to corneal epithelium was higher at 25 degrees C than at 37 or 4 degrees C, did not consistently correlate with the reported pathogenicity of the strain of Acanthamoeba, and was inhibited by mannose and by methyl-alpha-D-mannopyranoside.
On the Response of Nascent Soot Nanostructure and Oxidative Reactivity to Photoflash Exposure

Soot particles are a kind of major pollutant from fuel combustion. To enrich the understanding of soot, this work focuses on investigating detailed influences of instantaneous external irradiation (conventional photoflash exposure) on nanostructure as well as oxidation reactivity of nascent soot particles. By detailed soot characterizations flash can reduce the mass of soot and soot nanostructure can be reconstructed substantially without burning. After flash, the degree of soot crystallization increases while the soot reactive rate decreases and the activation energy increases. In addition, nanostructure and oxidative reactivity of soot in air and Ar after flash are different due to their different thermal conductivities.
Commentary : some focus and process considerations regarding effects of parental depression on children

Six main questions are considered: How does depression affect parent-child interaction? Are the effects of parental depression uniform? Do they stem specifically from depressions as such? Do the risks derive from alterations in parent-child interaction? Which psychological functions in the child are affected? and Why do children differ in their responses to parental depression?
A prospective study of the relationship over time of behavior problems, intellectual functioning, and family functioning in children with sickle cell disease: a report from the Cooperative Study of Sickle Cell Disease.

OBJECTIVE To longitudinally assess the relationship of behavioral problems, intellectual functioning, and family functioning in children with sickle cell disease (SCD). METHOD The study sample included 222 children enrolled in the Cooperative Study of Sickle Cell Disease (CSSCD). The study protocol included intellectual evaluation and brain magnetic resonance imaging (MRI) of the children, and mothers completed the Child Behavior Checklist and Family Environment Scale. At least two complete sets of measures were obtained across four assessment points over the study period of 9 years. RESULTS Intellectual functioning declined, but family functioning and behavior problem scores did not change significantly. Consistent behavior problems were reported by mothers for 9% of the children. The risk of consistent behavior problems was not related to MRI classification, gender, education level of mother, or age of the child but significantly increased with higher baseline levels of family conflict and decreased with higher baseline full-scale IQ. An increase in behavior problems was associated with an increase in family conflict. CONCLUSIONS Maternal appraisal of family conflict is a risk factor for the small subgroup of children with SCD with consistent mother-reported behavior problems and a salient intervention target for fostering adaptation.
The development of comprehensive search skills

WELLMAN, HENRY M. ; SOMERVILLE, SUSAN C. ; REVELLE, GLENDA L. ; HAAKE, ROBERT J.; and SOPHIAN , CATHERINE. The Development of Comprehensive Search Skills. CHILD DEVELOPMENT, 1984, 55, 472-481. 2 studies of young children's comprehensive search skills are reported. The first examined 2Y2-, 3Y2-, and 4Y2-year-olds' ability to conduct nonredundant comprehensive searches of small lidded trash cans. The 2Y2-year-olds achieved comprehensive search only in a lids-open condition, where lids of the cans automatically stayed open (once searched), creating an external record of which locations had been searched. The 3/2-year-olds and 4Y2-year-olds were more able to search comprehensively and nonredundantly in a variety of conditions. The second study examined 3-, 4-, and 5-year-olds' ability to find 5 Easter eggs hidden on a large playground. Eggs were hidden in 2 clusters as the child watched-3 eggs on 1 side of the playground, 2 on the other. Children did not minimize distance in their search paths for finding the eggs. However, they did minimize traverses of the playground, that is, they tended to find all eggs in 1 cluster before searching in the other. Results were discussed in relation to a 3-stage description of the development of comprehensive search strategies where comprehensive search develops out of (a) early forms of search persistence, followed by (b) comprehensive search based on sighting procedures, and finally (c) planned efficient searches.
Paroxysmal Kinesigenic Dyskinesia Caused by 16p11.2 Microdeletion

Background Four cases of paroxysmal kinesigenic dyskinesia (PKD) have been reported in individuals with proximal 16p11.2 microdeletions that include PRRT2. Case Report We describe a fifth patient with PKD, features of Asperger’s syndrome, and mild language delays. Sanger sequencing of the PRRT2 gene did not identify any mutations implicated in PKD. However, microarray-based comparative genomic hybridization (aCGH) detected a 533.9-kb deletion on chromosome 16, encompassing over 20 genes and transcripts. Discussion This case underscores the importance of aCGH testing for individuals with PKD who do not have PRRT2 mutations, particularly when developmental delays, speech problems, intellectual disability, and/or autism spectrum disorder are present.
Multi-Prototype Concept and Object Typicality in Ontology

Concept representation in ontology is a basic problem on the Semantic Web. In human cognitive process, object typicality plays an important role in concept representation. Traditional ontologies cannot reflect the typicality of objects in concepts. In this paper, we present a cognitive model of ontology with multi-prototype concept and object typicality. It can better approximate to human’s cognition than other models known to us.
Factor XIII-A subunit Val34Leu polymorphism is associated with the risk of thrombosis in patients with antiphospholipid antibodies and high fibrinogen levels

Summary Recent reports have described the factor XIII A subunit (FXIII-A) Val34Leu polymorphism as a protective factor against venous and arterial thrombosis. The aim of this study was to investigate the association between the FXIII-A Val34Leu polymorphism, its interaction with fibrinogen concentration, and thrombosis in patients with antiphospholipid antibodies (aPL). We included 172 consecutive patients with aPL: 88 with primary antiphospholipid syndrome (APS), 38 with APS associated with systemic lupus erythematosus (APS-SLE), 32 with SLE and aPL but without APS (SLE-aPL), and 14 asymptomatic individuals with aPL (A-aPL). The FXIII-A Val34Leu polymorphism was assessed by polymerase chain reaction techniques. We found no significant differences in FXIII-A Leu34 allele frequencies between primary APS (allele frequency 0.22), APS-SLE (0.23), SLE-aPL (0.22) and A-aPL (0.32) patients, or between patients with (0.21) and without thrombosis (0.26). FXIII-A Leu34 allele frequencies were significantly lower in patients with thrombosis and those in the upper fibrinogen tertile (>3.40 g/l) (allele frequency 0.07) compared with patients without thrombosis in the upper fibrinogen tertile (0.29) and patients with (0.29) and without (0.25) thrombosis in the mid- and lower fibrinogen tertiles. The FXIII-A Leu34 allele had a protective effect against thrombosis in patients in the upper fibrinogen tertile (odds ratio [OR]=0.20, 95% confidence interval [CI] 0.07–0.60) but not in those in the other tertiles (OR=1.20, 95% CI 0.67–2.16). The FXIII-A Leu34 allele seems to have a protective effect on the development of thrombosis in patients with aPL, but only in those with high plasma fibrinogen values.
A dynamic framework for statistical selection problems

For the statistical selection problem we formulate a general framework comprising both sequential sampling allocation and optimal design selection, for which the traditional probability of correct selection measure is inadequate. Therefore, we introduce the integrated probability of correct selection to better characterize the objective. In this framework, the usual selection policy of choosing the design with the largest sample mean as the estimate of the best is no longer optimal. Rather, the optimal selection policy is to choose the design that maximizes the posterior integrated probability of correct selection, which is a function of both the posterior mean and the correlation structure induced by the posterior variance.
Effect of Curcumin on Lifespan, Activity Pattern, Oxidative Stress, and Apoptosis in the Brains of Transgenic Drosophila Model of Parkinson's Disease

Background. A time dependent loss of dopaminergic neurons and the formation of intracellular aggregates of alpha synuclein have been reported in PD model flies. Methods. The progeny (PD flies) expressing human alpha synuclein was exposed to 25, 50, and 100 µM of curcumin mixed in the diet for 24 days. The effect of curcumin was studied on lifespan, activity pattern, oxidative stress, and apoptosis in the brains of PD model flies. The activity of PD model flies was monitored by using Drosophila activity monitors (DAMs). For the estimation of oxidative stress, lipid peroxidation and protein carbonyl content were estimated in the flies brains of each treated groups. The cell death in Drosophila brain was analyzed by isolating brains in Ringer's solution placing them in 70% ethanol and stained in acridine orange to calculate the gray scale values. Results. The exposure of flies to 25, 50, and 100 µM of curcumin showed a dose dependent significant delay in the loss of activity pattern, reduction in the oxidative stress and apoptosis, and increase in the life span of PD model flies. Conclusion. Curcumin is potent in reducing PD symptoms.
Cross-layer Mobile Chord P2P protocol design for VANET

Efficient content distribution is one of the emerging applications in vehicular networks. To provide scalable content distribution in vehicular networks, Chord Peer-to-Peer (P2P) overlay could be applied. Most P2P protocols, including Chord, are designed for wired-line network, and might perform poorly in mobile networks. Mobile Chord (MChord) is proposed to enhance the P2P performance over Vehicular Ad hoc Network (VANET). In addition, cross-layer design to improve MChord performance in VANET is also investigated. Extensive NS-2 simulations with vehicular mobility traces are conducted to evaluate the P2P overlay performance in VANET. MChord and its cross-layer design outperforms the original Chord in various aspects, including application layer forwarding steps, query response ratio, correct query response ratio, and application delay.
“Stop Deploying Your White Privilege on Me!” Aboriginal and Torres Strait Islander Engagement with the Australian Association of Social Workers

Abstract Historically, few Aboriginal and Torres Strait Islander social workers have joined and remained active members of the professional organisation that represents the interests of the social work profession, the Australian Association of Social Workers (AASW). This research project uses qualitative methodology to investigate barriers to Aboriginal and Torres Strait Islander participation in the AASW and propose how these barriers might be overcome. In offering insights from Aboriginal and Torres Strait Islander people, the research findings address issues of social justice, equity, and social disadvantage. They suggest ways of improving cross cultural relationships and practices that will increase practice knowledge and promote a more effective and sustainable relationship between Aboriginal and Torres Strait Islander social workers and the AASW.
A Natural Meiotic DNA Break Site in Schizosaccharomyces pombe Is a Hotspot of Gene Conversion, Highly Associated With Crossing Over

In Schizosaccharomyces pombe, meiosis-specific DNA breaks that initiate recombination are observed at prominent but widely separated sites. We investigated the relationship between breakage and recombination at one of these sites, the mbs1 locus on chromosome I. Breaks corresponding to 10% of chromatids were mapped to four clusters spread over a 2.1-kb region. Gene conversion of markers within the clusters occurred in 11% of tetrads (3% of meiotic chromatids), making mbs1 a conversion hotspot when compared to other fission yeast markers. Approximately 80% of these conversions were associated with crossing over of flanking markers, suggesting a strong bias in meiotic break repair toward the generation of crossovers. This bias was observed in conversion events at three other loci, ade6, ade7, and ura1. A total of 50–80% of all crossovers seen in a 90-kb region flanking mbs1 occurred in a 4.8-kb interval containing the break sites. Thus, mbs1 is also a hotspot of crossing over, with breakage at mbs1 generating most of the crossovers in the 90-kb interval. Neither Rec12 (Spo11 ortholog) nor I-SceI-induced breakage at mbs1 was significantly associated with crossing over in an apparently break-free interval >25 kb away. Possible mechanisms for generating crossovers in such break-free intervals are discussed.
Biracial Americans' Experience with Identity, Gender Roles, and Anxiety

The current study aims to shed light on the experiences of a small but growing group, biracial Americans with one African American and one European American birth parent. Prior results suggest that it would be useful to study ethnic identity and its correlates among members of this group. Additionally, although research to date suggests different gender role norms for African Americans and European Americans, and that anxiety level differs across gender role categories, apparently no research so far has looked at these factors among biracial Americans. The measures used in the study were the Revised Multigroup Ethnic Identity Measure (R-MEIM), the Personal Attributes Questionnaire (PAQ), and the Inventory of Depression and Anxiety Scale (IDAS). Results from the Well-being scale of the IDAS show low levels for biracial participants with feminine/undifferentiated gender roles and high levels for those with masculine/androgynous roles. Additional findings, implications, and study limitations are further discussed.
Transition to Adulthood as a Parent-Youth Project: Governance Transfer, Career Promotion, and Relational Processes.

This study determined how youth (ages 17-21) and their parents jointly constructed and acted on goals and strategies pertinent to the transition to adulthood. Twenty parent-youth dyads were followed over an 8-month period using the qualitative action-project method. Data included their joint conversations, video recall of internal processes, self-monitoring logs, and researcher telephone monitoring. Detailed and repeated analysis of elements, functional steps, and goals resulted in the identification of an explicit joint project for each dyad that the participants saw as pertinent to the transition to adulthood. These projects referred broadly to the youth development of identity and social inclusion in the adult world and included the specific projects of career promotion, governance transfer, and parent-youth relational processes. The findings illustrate the complexity of the transition-to-adulthood process as well as its joint construction by parent and youth. Implications for practice include identifying and following the joint parent-youth transition project.
Biometry of the pubovisceral muscle and levator hiatus by three‐dimensional pelvic floor ultrasound

Until recently, magnetic resonance was the only imaging method capable of assessing the levator ani in vivo. Three‐dimensional (3D) ultrasound has recently been shown to be able to demonstrate the pubovisceral muscle. The aim of this study was to define the anatomy of the levator hiatus in young nulliparous women with the help of 3D ultrasound.