Miracle-dz/UniFAR-FTUs huggingface dataset:
The impact of solid state drive on search engine cache management

Caching is an important optimization in search engine architectures. Existing caching techniques for search engine optimization are mostly biased towards the reduction of random accesses to disks, because random accesses are known to be much more expensive than sequential accesses in traditional magnetic hard disk drive (HDD). Recently, solid state drive (SSD) has emerged as a new kind of secondary storage medium, and some search engines like Baidu have already used SSD to completely replace HDD in their infrastructure. One notable property of SSD is that its random access latency is comparable to its sequential access latency. Therefore, the use of SSDs to replace HDDs in a search engine infrastructure may void the cache management of existing search engines. In this paper, we carry out a series of empirical experiments to study the impact of SSD on search engine cache management. The results give insights to practitioners and researchers on how to adapt the infrastructure and how to redesign the caching policies for SSD-based search engines.
Testing cosmological structure formation using redshift-space distortions

Observations of redshift-space distortions in spectroscopic galaxy surveys offer an attractive method for observing the build-up of cosmological structure. In this paper, we develop and test a new statistic based on anisotropies in the measured galaxy power spectrum, which is independent of galaxy bias and matches the matter power spectrum shape on large scales. The amplitude provides a constraint on the derivative of the linear growth rate through fσ 8 (mass). This demonstrates that spectroscopic galaxy surveys offer many of the same advantages as weak lensing surveys, in that they both use galaxies as test particles to probe all matter in the Universe. They are complementary as redshift-space distortions probe non-relativistic velocities and therefore the temporal metric perturbations, while weak lensing tests the sum of the temporal and spatial metric perturbations. The degree to which our estimator can be pushed into the non-linear regime is considered and we show that a simple Gaussian damping model, similar to that previously used to model the behaviour of the power spectrum on very small scales, can also model the quasi-linear behaviour of our estimator. This enhances the information that can be extracted from surveys for A cold dark matter (ACDM) models.
Social negotiations of meanings and changes in the beliefs of prospective teachers: A vygotskian perspective

Abstract This study presents an exploration of the belief changes of prospective teachers (PTs) through social co-constructivist teaching. The future presumed in-class teaching orientations of the PTs were also estimated by metaphor analysis. A case study was conducted to monitor the belief changes of the PTs and estimate their probable in-class practices. The participants were six PTs involved in a certification in education programme. The data were gathered from the following different sources; interviews, written reflections and metaphor explanations. The data that were analysed interpretatively and specific parts of the analysed data were subjected to quantification. The PTs held considerably conventional and idealistic teaching beliefs prior to the implementations. The PTs improved their reasoning and enlarged their conceptualisations regarding teaching and learning after the implementations. Five types of teaching belief typologies displaying inherently sophisticated nature of the beliefs were extracted. Some of the PTs appeared to have promise in terms of implementing more learner-centred teaching; however, others preserved their traditional teaching practical orientations. It was considered that changes in teaching beliefs may have motivational and attitudinal dimensions. Finally, capturing the metaphors of the PTs regarding teaching and learning appeared to provide more realistic insights into the estimated in-class practical orientations.
Neuronal death in the spinal ganglia of the chick embryo and its reduction by nerve growth factor

In the spinal ganglia of the chick embryo, two neuronal populations can be distinguished: large, early differentiating ventrolateral (VL) cells and small, late differentiating dorsomedial (DM) cells. It was found that, beginning with stage 25, the DM cells originate from a narrow band of small, immature cells at the medial border of the ganglion, extending to the dorsolateral border. We have designated this band as the inner and outer marginal zone. Neuronal death was investigated in thoracic ganglion 18 and brachial ganglion 15 by counting degenerating cells, separately for the VL and DM populations, at every stage from stage 24 (4% days) to stage 38 (12 days). In both ganglia, separate degeneration periods were found for the VL and DM populations which do not overlap. The peaks of degeneration are: stage 27 (5% days) for the VL population in ganglion 18, stage 30 (6% to 7 days) for VL in ganglion 16, and stage 35 (8% days) for DM in both ganglia. Daily injections of 6 pg of nerve growth factor, (NGF) in 6 to 12 ~1 of 0.9% sterile salt solution into the yolk sac from stage 21 (3% days) to the day of sacrifice resulted in a significant reduction of neuronal death in the VL population of ganglion 18 and in the rescue of practically all VL neurons in ganglion 15 and all DM neurons in both ganglia, which normally would have died. This is the first demonstration of an NGF effect on VL neurons. In the analysis of the multiple effects of nerve growth factor (NGF), the sympathetic ganglia have played the dominant role; the sensory ganglia which are the other target of NGF have attracted much less attention. Yet, if one entertains the notion that NGF might be the natural trophic maintenance agent for these two neuron types (i.e., that NGF is actually produced by their target organs), then one approach to the testing of this hypothesis would be to engage in in viva experiments. For this
Disparate reports of stress and family relations between youth who commit sexual crimes and their caregivers

ABSTRACT Certain family factors, including dynamics, interactions and communication patterns, experiences of intra-familial victimisation, overall functioning and attachment can increase propensities for the commission of a sexual crime and may even be linked to recidivism. However, there is an absence of research that examines factors that contribute to problematic family relationships and how youth and caregivers vary in perceptions of family relationships. The current cross-sectional research study delivered the same validated instruments to youth (n = 46) and their caregivers (n = 46) to determine relative perceptions of family relationships and stress. Two multiple regression models were conducted to determine factors that contribute to problematic family relationships. Youth reported greater stress scores and more problems in family relationships relative to caregivers. Stress contributed to family relationship problems for youth and caregivers, but protective factors were associated with less family relationship problems for caregivers. Treatment and research implications are discussed.
Physical conditions in high-redshift GRB-DLA absorbers observed with VLT/UVES: implications for molecular hydrogen searches

Aims. We aim to understand the nature of the absorbing neutral gas in the galaxies hosting high-redshift long-duration gamma-ray bursts (GRBs) and to determine their physical conditions. Methods. A detailed analysis of high-quality VLT/UVES spectra of the optical afterglow of GRB 050730 and other Swift-era bursts is presented. Results. We report the detection of a significant number of previously unidentified allowed transition lines of Fe + , involving the fine structure of the ground term ( 6 D7/2, 6 D5/2, 6 D3/2, 6 D1/2) and that of other excited levels ( 4 F9/2, 4 F7/2, 4 F5/2, 4 F3/2, 4 D7/2, 4 D5/2), from the zabs = 3.969, log N(H 0 ) = 22.10, damped Lyman-α (DLA) system located in the host galaxy of GRB 050730. No molecular hydrogen (H2) is detected down to a molecular fraction of log f < −8.0. We derive accurate metal abundances for Fe + ,S + ,N 0 , Ni + , and, for the first time in this system, Si + and Ar 0 . The absorption lines are best-fit as a single narrow velocity component at zabs = 3.96857. The time-dependent evolution of the observed Fe + energy-level populations is modelled by assuming the excitation
“I am borrowing ya mixing ?" An Analysis of English-Hindi Code Mixing in Facebook

Code-Mixing is a frequently observed phenomenon in social media content generated by multi-lingual users. The processing of such data for linguistic analysis as well as computational modelling is challenging due to the linguistic complexity resulting from the nature of the mixing as well as the presence of non-standard variations in spellings and grammar, and transliteration. Our analysis shows the extent of Code-Mixing in English-Hindi data. The classification of Code-Mixed words based on frequency and linguistic typology underline the fact that while there are easily identifiable cases of borrowing and mixing at the two ends, a large majority of the words form a continuum in the middle, emphasizing the need to handle these at different levels for automatic processing of the data.
Assessing and Improving Student Understanding of Tree-Thinking

Assessing and Improving Student Understanding of Tree-Thinking Tyler A Kummer Department of Biology, BYU Doctor of Philosophy Evolution is the unifying theory of biology. The importance of understanding evolution by those who study the origins, diversification and diversity life cannot be overstated. Because of its importance, in addition to a scientific study of evolution, many researchers have spent time studying the acceptance and the teaching of evolution. Phylogenetic Systematics is the field of study developed to understand the evolutionary history of organisms, traits, and genes. Tree-thinking is the term by which we identify concepts related to the evolutionary history of organisms. It is vital that those who undertake a study of biology be able to understand and interpret what information these phylogenies are meant to convey. In this project, we evaluated the current impact a traditional study of biology has on the misconceptions students hold by assessing tree-thinking in freshman biology students to those nearing the end of their studies. We found that the impact of studying biology was varied with some misconceptions changing significantly while others persisted. Despite the importance of tree-thinking no appropriately developed concept inventory exists to measure student understanding of these important concepts. We developed a concept inventory capable of filling this important need and provide evidence to support its use among undergraduate students. Finally, we developed and modified activities as well as courses based on best practices to improve teaching and learning of tree-thinking and organismal diversity. We accomplished this by focusing on two key questions. First, how do we best introduce students to tree-thinking and second does tree-thinking as a course theme enhance student understanding of not only treethinking but also organismal diversity. We found important evidence suggesting that introducing students to tree-thinking via building evolutionary trees was less successful than introducing the concept via tree interpretation and may have in fact introduced or strengthened a misconception. We also found evidence that infusing tree-thinking into an organismal diversity course not only enhances student understanding of tree-thinking but also helps them better learn organismal diversity.
Sensing for spectrum sharing in cognitive LTE-A cellular networks

In this work we present a case for dynamic spectrum sharing between different operators in systems with carrier aggregation (CA) which is an important feature in 3GPP LTE-A systems. Cross-carrier scheduling and sensing are identified as key enablers for such spectrum sharing in LTE-A. Sensing is classified as Type 1 sensing and Type 2 sensing and the role of each in the system operation is discussed. The more challenging Type 2 sensing which involves sensing the interfering signal in the presence of a desired signal is studied for a single-input singleoutput system. Energy detection and the most powerful test are formulated. The probability of false alarm and of detection are analyzed for energy detectors. Performance evaluations show that reasonable sensing performance can be achieved with the use of channel state information, making such sensing practically viable.
Transneuronal Labeling of a Nociceptive Pathway, the Spino-(Trigemino-)Parabrachio-Amygdaloid, in the Rat

Transneuronal tracing of a nociceptive pathway, the spino-(trigemino)-parabrachio-amygdaloid pathway, was performed using an α-herpes virus, the Bartha strain of pseudorabies virus (PRV). Microinjection of PRV into the central nucleus of the amygdala (Ce) resulted in progressive retrograde and transneuronal infection of a multisynaptic circuit involving neurons in the brainstem and spinal cord as detected immunocytochemically. At short survival (26 hr), retrogradely labeled neurons were concentrated in the external lateral nucleus of the parabrachial complex (elPB) but were absent from both the trigeminal nucleus caudalis (TNC) and the spinal cord. At longer survivals (52 hr), labeled cells were present in lamina I of both the TNC and spinal dorsal horn. Retrograde labeling from the Ce with Fluoro-gold demonstrated that elPB neurons have long dendrites extending laterally into the terminal field of spinal and trigeminal afferents, where transneuronal passage of PRV to these afferents could occur. Even longer survivals (76 hr) resulted in a columnar pattern of cell labeling in the TNC and spinal dorsal horn that extended from lamina I into lamina II. At this longest survival, primary sensory neurons became infected. Bilateral excitotoxic lesions of the elPB blocked almost all viral passage from the Ce to superficial laminae of the TNC and spinal dorsal horn. These results demonstrate that nociceptive input to the amygdala is relayed from neurons in lamina I through the elPB. We propose that this modular arrangement of lamina I and II neurons may provide the basis for spinal processing of peripheral input to the amygdala.
Vitamin D Receptor Fok-I Polymorphism Modulates Diabetic Host Response to Vitamin D Intake Need for a nutrigenetic approach

OBJECTIVEdInterpopulation as well as interindividual variations in response to vitamin D intake commonly observed in subjects with type 2 diabetes may be related to genetic makeup. One of the candidate genes potentially responsible for this diversity is vitamin D receptor (VDR). This study aimed to investigate the interactive effect of VDR Fok-I polymorphism and vitamin D intake on diverse aspects of diabetic host response.
Beyond birth order: The biological logic of personality variation among siblings

Abstract Notwithstanding their relatedness, siblings vary as much as strangers with respect to personality traits. Attempting to explain this paradox across many publications, Frank J. Sulloway invokes evolutionary theory, specifically emphasizing Malthusian competition and referencing the concept of adaptive radiation, which produced beak variation among Darwinian finches as they spread across the Galapagos Archipelago. However, Sulloway understands birth order and other familial dynamics to create personality variation among siblings, using evolutionary concepts only as illustrative comparisons. The present paper argues that Sulloway mistook a literal truth for an analogy. Sibling personality variation does not mirror a process of evolution, it is a process of evolution. Substituting the macroevolutionary process of adaptive radiation for the microevolutionary process of adaptive diversification, and emphasizing the perpetuation of genetic material above the survival of the organism, sibling personality variation is herein explained as a hedge against lineage extinction. Unable either to predict environmental challenges or create pluripotent offspring, parents diversify their brood and thereby diversify their risk. As discussed, sibling personality variation as an ontogenetic process of adaptation remains relevant, but only in so far as it augments a primary genetic process of evolution.
The significance of mouse liver tumor formation for carcinogenic risk assessment: results and conclusions from a survey of ten years of testing by the agrochemical industry.

A survey was performed on the results of 138 carcinogenicity studies conducted in various mouse strains by the agrochemical industry over the period 1983-1993. Data for liver tumor incidence, liver weight, and histopathology were collected along with data on genotoxicity. Studies were judged positive or negative for liver tumor formation on the basis of apparent dose response, malignancy, and difference from historical control values using a weight of evidence approach. Thirty-seven studies were judged to be positive for liver tumorigenicity in one or both sexes. There was no evidence showing an influence of the mouse strain and the duration of the study on the proportion of positive studies. Although 8 of the chemicals tested in the 138 studies were positive in the Ames test, only one of these was judged positive for carcinogenicity. Only 6 of the 37 positive chemicals had any other reported positive genotoxicity findings. A clear relationship between hepatomegaly at 1 year after exposure and a positive tumorigenic outcome at 18 months or 2 years after exposure was demonstrated. Whereas the average relative liver weight of top dose animals was 110% of control in negative studies, it was 150% in positive studies. Likewise, very few negative studies demonstrated significant pathological findings after 1 year, whereas the majority of positive studies had significant liver pathology. The implications of these findings for extrapolation to humans are discussed. Imagesp1196-aFigure 1. AFigure 1. BFigure 1. CFigure 1. DFigure 2. AFigure 2. BFigure 2. CFigure 2. DFigure 3.Figure 3.Figure 4.Figure 4.
Decomposing the Channels of Influence of Conditional Transfers in a Structural Model of Educational Choice

Among children from poor households in marginal Mexican rural communities who finish primary school, 25% do not continue in secondary school and 8.8% of those who enter secondary school abandon after failing the first year. The ambitious Program for Education, Health, and Nutrition (Progresa) was introduced to remedy this situation, making cash payments to mothers of 2.5 million poor rural children to send them to school. Randomized treatment allows accurate impact analysis. We estimate a structural model of enrollment decisions to continue and to repeat grades in case of failure. Results show that Progresa increases secondary school enrollment among beneficiaries from 71.9% to 79.2%, eliminating the difference between poor and non-poor. On average, poor children’s school achievement increases by 0.3 years over the three year secondary cycle. The program benefits more children from the poorest households, with uneducated parents, and living further away from a school. We show that reducing failure rate of children with uneducated parents and increasing access to or information on job opportunities that offer higher return to education outside the community would also greatly increase enrollment into secondary school.
The perceptions of Australian senior entrepreneurs on the drivers of their entrepreneurial activity

Purpose Why is self-employment an attractive option for certain seniors and what drives seniors into business start-ups? In this study, the motivations and preferences of senior entrepreneurs in Australia, to become self-employed, by means of business start-ups, are explored. The purpose of this paper is to provide empirical basis for policy implications. Design/methodology/approach A mixed methods study is conducted. Members of the National Senior’s Association in Australia were interviewed and surveyed. The semi-structured interviews identified the key factors influencing senior entrepreneurs in relation to self-employment and entrepreneurial choices at a later career stage. The survey collected information on intentionality, motivation, skills, opportunities, success, satisfaction, participation, barriers, benefits, education and training, and perceptions of policy support for senior entrepreneurs. Findings Respondents gave an account of the prevalence of pull factors motivating their choice of an entrepreneurial career. Multivariate statistical analysis of survey responses showed that senior entrepreneurs are more driven by opportunity than necessity and are primarily internally motivated. Research limitations/implications Results of this study suggest a weak link between motivation by others and the act of start-up, but this may also imply that those seniors who are more likely to become entrepreneurs are more likely to ignore the impulses from their social context. This requires further investigation to ensure a robust identification of drivers and an elimination of contextual effects. Further research is suggested to compose a relevant model structure in different contexts and a representative sample to confirm the model outcomes. Originality/value This is the first mixed methods study of the antecedents of senior entrepreneurs’ start-up intentions in Australia. The study also uses entrepreneurial activity as opposed to intention as its dependent variable, which allows for a more accurate evaluation of antecedents to the senior entrepreneurship phenomenon.