Miracle-dz/UniFAR-FTUs huggingface dataset:
Packing and covering dense graphs

Let d be a positive integer. A graph G is called d-divisible if d divides the degree of each vertex of G. G is called nowhere d-divisible if no degree of a vertex of G is divisible by d. For a graph H, gcd(H) denotes the greatest common divisor of the degrees of the vertices of H. The H-packing number of G is the maximum number of pairwise edge disjoint copies of H in G. The H-covering number of G is the minimum number of copies of H in G whose union covers all edges of G. Our main result is the following: For every fixed graph H with gcd(H) = d, there exist positive constants ϵ(H) and N(H) such that if G is a graph with at least N(H) vertices and has minimum degree at least (1 − ϵ(H))|G|, then the H-packing number of G and the H-covering number of G can be computed in polynomial time. Furthermore, if G is either d-divisible or nowhere d-divisible, then there is a closed formula for the H-packing number of G, and the H-covering number of G. Further extensions and solutions to related problems are also given. © 1998 John Wiley & Sons, Inc. J Combin Designs 6: 451–472, 1998
Comparative Evaluation of Four Bacteria-Specific Primer Pairs for 16S rRNA Gene Surveys

Bacterial taxonomic community analyses using PCR-amplification of the 16S rRNA gene and high-throughput sequencing has become a cornerstone in microbiology research. To reliably detect the members, or operational taxonomic units (OTUs), that make up bacterial communities, taxonomic surveys rely on the use of the most informative PCR primers to amplify the broad range of phylotypes present in up-to-date reference databases. However, primers specific for the domain Bacteria were often developed some time ago against database versions that are now out of date. Here we evaluated the performance of four bacterial primers for characterizing complex microbial communities in explosives contaminated and non-contaminated forest soil and by in silico evaluation against the current SILVA123 database. Primer pair 341f/785r produced the highest number of bacterial OTUs, phylogenetic richness, Shannon diversity, low non-specificity and most reproducible results, followed by 967f/1391r and 799f/1193r. Primer pair 68f/518r showed overall low coverage and a bias toward Alphaproteobacteria. In silico, primer pair 341f/785r showed the highest coverage of the domain Bacteria (96.1%) with no obvious bias toward the majority of bacterial species. This suggests the high utility of primer pair 341f/785r for soil and plant-associated bacterial microbiome studies.
Increasing potential for intense tropical and subtropical thunderstorms under global warming

Significance A substantial fraction of the world’s most intense thunderstorms occur in the tropics and subtropics, but the response of such storms to climate change remains uncertain. Here, we show that, in simulations of global warming, a measure of the energy available to thunderstorms increases robustly across the tropics and subtropics. Furthermore, we elucidate an important mechanism contributing to such increases in available energy, and we present observational evidence that this mechanism is present in Earth’s atmosphere. By combining theory, observations, and models, our results provide confidence in climate model projections of future intense thunderstorm potential; such model projections are shown to imply large future increases in the frequency of damaging thunderstorm environments in tropical and subtropical regions. Intense thunderstorms produce rapid cloud updrafts and may be associated with a range of destructive weather events. An important ingredient in measures of the potential for intense thunderstorms is the convective available potential energy (CAPE). Climate models project increases in summertime mean CAPE in the tropics and subtropics in response to global warming, but the physical mechanisms responsible for such increases and the implications for future thunderstorm activity remain uncertain. Here, we show that high percentiles of the CAPE distribution (CAPE extremes) also increase robustly with warming across the tropics and subtropics in an ensemble of state-of-the-art climate models, implying strong increases in the frequency of occurrence of environments conducive to intense thunderstorms in future climate projections. The increase in CAPE extremes is consistent with a recently proposed theoretical model in which CAPE depends on the influence of convective entrainment on the tropospheric lapse rate, and we demonstrate the importance of this influence for simulated CAPE extremes using a climate model in which the convective entrainment rate is varied. We further show that the theoretical model is able to account for the climatological relationship between CAPE and a measure of lower-tropospheric humidity in simulations and in observations. Our results provide a physical basis on which to understand projected future increases in intense thunderstorm potential, and they suggest that an important mechanism that contributes to such increases may be present in Earth’s atmosphere.
Debt problems and life transitions: a register-based panel study of Finnish young people

ABSTRACT This register-based panel study analyzed the impacts of key life events on debt problems among emerging adults using a within-individual design. In this study, 8093 Finnish young people (born 1988–1990) were monitored for 9 years (2005–2013). The data comprised information from administrative registers, including information about debt enforcement, which was used as an indicator of debt problems. Key life events included leaving home, obtaining the first full-time job, and becoming a parent. Debt problems were highly common. They increased after leaving home, especially among those leaving home at a young age. Obtaining the first full-time job was not regarded as a major event in the context of debt problems, although having a job was associated with a lower level of debt problems. Such problems increased after becoming a parent. The results imply that life-changing events can have an impact on economic problems.
The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. VIII. Serpens Observed with MIPS

We present maps of 1.5 deg2 of the Serpens dark cloud at 24, 70, and 160 μm observed with the Spitzer Space Telescope MIPS camera. We describe the observations and briefly discuss the data processing carried out by the c2d team on these data. More than 2400 compact sources have been extracted at 24 μm, nearly 100 at 70 μm, and four at 160 μm. We estimate completeness limits for our 24 μm survey from Monte Carlo tests with artificial sources inserted into the Spitzer maps. We compare source counts, colors, and magnitudes in the Serpens cloud to two reference data sets: a 0.50 deg 2 set on a low-extinction region near the dark cloud, and a 5.3 deg2 subset of the SWIRE ELAIS N1 data that was processed through our pipeline. These results show that there is an easily identifiable population of young stellar object candidates in the Serpens cloud that is not present in either of the reference data sets. We also show a comparison of visual extinction and cool dust emission illustrating a close correlation between the two and find that the most embedded YSO candidates are located in the areas of highest visual extinction.
Young children, sound-producing objects, and the shape bias

There is evidence that, when given simple musical instruments, young children construct pretend play episodes centered on the shape of the objects rather than their sounds. This attention to shape has also been observed when children learn the names of novel objects. Such a “shape bias”, when engaging in pretend play with instruments and during linguistic tasks, may indicate the possibility that shape is a perceptually important attribute across contexts. The aim of this study was to determine whether children favor shape, color, or sound when identifying a novel object. In two studies, 3- to 5-year-olds were shown target objects that were given a novel name and shared one attribute (e.g., shape, sound) with test objects. During one trial, the objects were shaken to produce sound, and during another, the children manipulated the objects in order to produce sounds. In both experiments, children selected based on shape significantly more often (p < .001) than chance rates, indicating a strong bias toward the shape of a novel object rather than the sound it produces during a cognitive task.
Smoking-Induced Affect Modulation in Nonwithdrawn Smokers With Posttraumatic Stress Disorder, Depression, and in Those With No Psychiatric Disorder

This research sought to determine whether smoking influences affect by means other than withdrawal reduction. Little previous evidence suggests such an effect. We surmised that such an effect would be especially apparent in posttraumatic stress disorder (PTSD) and major depressive disorder (MDD), 2 disorders that are frequently comorbid with smoking and that involve dysregulated affect. Participants were U.S. veterans who were regular smokers (N = 159): 52 with PTSD (58% with comorbid MDD), 51 with MDD, and 56 controls with no psychiatric disorder. During 3 positive and 3 negative mood induction trials (scheduled over 2 sessions), nonwithdrawn participants smoked either a nicotine-containing cigarette (NIC+), a nicotine-free cigarette (NIC−), or held a pen. Positive and negative affect were each measured before and after mood induction. Results showed a significant 2-way interaction of Smoking Condition × Time on negative affect during the negative mood induction (F(6, 576) = 2.41, p = . 03) in those with PTSD and controls. In these groups, both NIC+ and NIC−, relative to pen, produced lower negative affect ratings after the negative mood induction. There was also a 2-way interaction of Smoking Condition × Time on positive affect response to the positive mood induction among those with PTSD and controls (F(6, 564) = 3.17, p = . 005) and among MDD and controls (F(6, 564) = 2.27, p = . 036). Among all smokers, NIC+ enhanced the magnitude and duration of positive affect more than did NIC−. Results revealed affect modulation outside the context of withdrawal relief; such effects may motivate smoking among those with psychiatric diagnoses, and among smokers in general.
The Role of Nonstandard Workers in Client-Organizations

This paper examines the diversity and complexities of nonstandard work. Two types of nonstandard workers are studied: workers employed by temporary help agencies (THAs) and contract company workers, both of which are involved in a triadic employment relationship. The analyses are based on interviews with managers in three service-sector companies in Norway. The paper discusses the dilemmas managers in client-organizations face when agency temporaries and contract company workers are integrated and do work similar to what is done by the regular workers in the firm. Managers in client-organizations require loyalty from nonstandard workers, and under certain conditions, nonstandard workers are able to form pressure groups. The findings are discussed in relation to the highly regulated labour market in Norway, in a period of labour shortage.
SMCHD1 accumulates at DNA damage sites and facilitates the repair of DNA double-strand breaks

ABSTRACT SMCHD1 is a structural maintenance of chromosomes (SMC) family protein involved in epigenetic gene silencing and chromosome organisation on the female inactive X chromosome and at a limited number of autosomal loci. Here, we demonstrate that SMCHD1 also has a role in DNA repair of double-strand breaks; SMCHD1 is recruited to sites of laser micro-irradiated damage along with other DNA repair factors, including Ku80 (also known as XRCC5 in mammals) and RAD51. Cells deficient in SMCHD1 show evidence of decreased efficiency of repair and cell viability after DNA damage. We suggest that SMCHD1 responds to DNA double-strand breaks in a manner that is likely to involve its ability to alter chromatin states to facilitate DNA repair.
RET Fusion Genes in Korean Non-Small Cell Lung Cancer

Recently, rearranged during transfection (RET) fusions have been identified in approximately 1% of non-small cell lung cancer (NSCLC). To know the prevalence of RET fusion genes in Korean NSCLCs, we examined the RET fusion genes in 156 surgically resected NSCLCs using a reverse transcriptase polymerase chain reaction. Two KIF5B-RET fusions and one CCDC6-RET fusion were identified. All three patients were females and never smokers with adenocarcinomas. RET fusion genes were mutually exclusive from EGFR, KRAS mutations and EML4-ALK fusion. RET fusion genes occur 1.9% (3 of 156) of surgically treated NSCLC patients in Koreans.
Predictive Simulation Generates Human Adaptations during Loaded and Inclined Walking

Predictive simulation is a powerful approach for analyzing human locomotion. Unlike techniques that track experimental data, predictive simulations synthesize gaits by minimizing a high-level objective such as metabolic energy expenditure while satisfying task requirements like achieving a target velocity. The fidelity of predictive gait simulations has only been systematically evaluated for locomotion data on flat ground. In this study, we construct a predictive simulation framework based on energy minimization and use it to generate normal walking, along with walking with a range of carried loads and up a range of inclines. The simulation is muscle-driven and includes controllers based on muscle force and stretch reflexes and contact state of the legs. We demonstrate how human-like locomotor strategies emerge from adapting the model to a range of environmental changes. Our simulation dynamics not only show good agreement with experimental data for normal walking on flat ground (92% of joint angle trajectories and 78% of joint torque trajectories lie within 1 standard deviation of experimental data), but also reproduce many of the salient changes in joint angles, joint moments, muscle coordination, and metabolic energy expenditure observed in experimental studies of loaded and inclined walking.
Tourist Perceptions of Heritage Exhibits: A Comparative Study from Israel

It is common in tourism and leisure literature to define and approach tourism subgroups in terms of the presence of the tourists in certain spaces. This approach is challenged in the present paper. It is argued that the understanding of heritage tourism should be based on the link between the individual and the space, namely tourist perceptions of a site relative to their own heritage. Based on a study dealing with visitation patterns to places where historic artefacts are presented, it is suggested that tourist perception is key to the understanding of visitation patterns. It is not so much the artefacts the tourists see or observe, but the meaning they ascribe to them. The theoretical implications of this argument are discussed in terms of tourism in general and heritage tourism in particular, as well as the practical applications to cultural heritage management.
Inequality and the Product Cycle

This paper builds an endogenous growth model whose purpose is to show how the inequality rise experienced by most OECD countries in the last 25 years may be linked to permanent changes in the structure of the product life cycle. Most recent papers interpret the inequality rise as the result of an increase of the skillpremium, notwithstanding the fact that 50% of the inequality rise is residual (ie cannot be explained by observable differences). In order to account for the rise of both between-group and within-group inequality we make the assumption of a dual labor market. Each firm offers two kind of jobs: primary and secondary jobs. Primary jobs, which are located in the core activities of the firm, are paid an efficiency-wage premium, whereas the secondary jobs, located in the non essential activities, are paid the market clearing wage. Workers may have different skills, but the skilled ones may perform both kind of jobs. The efficiency wage premium paid to core workers is our measure of between-group inequality. This structure is embedded in an endogenous growth model where innovation triggers a two period product cycle. The key assumption is that new goods use (relatively) more core workers than old goods. This implies that both within-group and between-group inequality are linked to the pace of innovation and the structure of the cycle (i.e. the relative length of two periods). The inequality rise can be explained as the result of a series of changes in the product cycle that have increased the share of new, primary jobs-intensive, goods.
A 60-GHz sub-sampling frequency synthesizer using sub-harmonic injection-locked quadrature oscillators

This paper presents a 60-GHz sub-harmonic injection-locked quadrature frequency synthesizer with subsampling operation. This allows the proposed synthesizer to achieve relatively lower in-band phase noise through the use of sub-sampling operation, as well as good out-of-band phase noise through the use of sub-harmonic injection. The proposed synthesizer has been implemented in a standard 65-nm CMOS technology. It can support all 60-GHz channels and achieves a phase noise of -115dBc/Hz at 10MHz offset. The sub-sampling operation helps reducing an integrated jitter from 12ps to 2.1ps. It consumes 20.2mW and 14mW from a 20GHz sub-sampling phase-locked loop (SS-PLL) and a quadrature injection-locked oscillator (QILO), respectively.
Medical causes of admissions to hospital among adults in Africa: a systematic review

Background : Despite the publication of several studies on the subject, there is significant uncertainty regarding the burden of disease among adults in sub-Saharan Africa (sSA). Objectives : To describe the breadth of available data regarding causes of admission to hospital, to systematically analyze the methodological quality of these studies, and to provide recommendations for future research. Design : We performed a systematic online and hand-based search for articles describing patterns of medical illnesses in patients admitted to hospitals in sSA between 1950 and 2010. Diseases were grouped into bodily systems using International Classification of Disease (ICD) guidelines. We compared the proportions of admissions and deaths by diagnostic category using χ2. Results : Thirty articles, describing 86,307 admissions and 9,695 deaths, met the inclusion criteria. The leading causes of admission were infectious and parasitic diseases (19.8%, 95% confidence interval [CI] 19.6–20.1), respiratory (16.2%, 95% CI 16.0–16.5) and circulatory (11.3%, 95% CI 11.1–11.5) illnesses. The leading causes of death were infectious and parasitic (17.1%, 95% CI 16.4–17.9), circulatory (16%, 95% CI 15.3–16.8) and digestive (16.2%, 95% CI 15.4–16.9). Circulatory diseases increased from 3.9% of all admissions in 1950–59 to 19.9% in 2000–2010 (RR 5.1, 95% CI 4.5–5.8, test for trend p<0.00005). The most prevalent methodological deficiencies, present in two-thirds of studies, were failures to use standardized case definitions and ICD guidelines for classifying illnesses. Conclusions : Cardiovascular and infectious diseases are currently the leading causes of admissions and in-hospital deaths in sSA. Methodological deficiencies have limited the usefulness of previous studies in defining national patterns of disease in adults. As African countries pass through demographic and health transition, they need to significantly invest in clinical research capacity to provide an accurate description of the disease burden among adults for public health policy.
mpaired holistic processing in congenital prosopagnosia

It has long been argued that face processing requires disproportionate reliance on holistic or configural processing, relative to that required for non-face object recognition, and that a disruption of such holistic processing may be causally implicated in prosopagnosia. Previously, we demonstrated that individuals with congenital prosopagnosia (CP) did not show the normal face inversion effect (better performance for upright compared to inverted faces) and evinced a local (rather than the normal global) bias in a compound letter global/local (GL) task, supporting the claim of disrupted holistic processing in prosopagnosia. Here, we investigate further the nature of holistic processing impairments in CP, first by confirming, in a large sample of CP individuals, the absence of the normal face inversion effect and the presence of the local bias on the GL task, and, second, by employing the composite face paradigm, often regarded as the gold standard for measuring holistic face processing. In this last task, we show that, in contrast with controls, the CP group perform equivalently with aligned and misaligned faces and was impervious to (the normal) interference from the task-irrelevant bottom part of faces. Interestingly, the extent of the local bias evident in the composite task is correlated with the abnormality of performance on diagnostic face processing tasks. Furthermore, there is a significant correlation between the magnitude of the local bias in the GL and performance on the composite task. These results provide further evidence for impaired holistic processing in CP and, moreover, corroborate the critical role of this type of processing for intact face recognition.
Factors affecting attitudes toward groundwater pollution among Ohio farmers

ABSTRACT: Data were collected from 1305 farm owner operators in the Scioto River watershed in Ohio using a systematic random sampling technique to examine factors affecting attitudes toward groundwater pollution. A social learning-farm structure model was developed to guide the investigation. Study findings revealed the theoretical perspective was useful for predicting attitudes toward groundwater pollution. Multiple regression analysis demonstrated that eight variables were significant at the . 05 level in explaining 33.8 percent of the variance in a composite index developed to measure attitudes toward groundwater pollution. Farmers who believed that pesticides and fertilizers in groundwater posed a threat to family health tended to perceive that groundwater pollution was an important environmental issue. They were also more willing to force land operators to use groundwater protection practices, Farmers who indicated they were more knowledgeable of ground-water problems in county of residence tended to perceive that groundwater pollution was less important as an environmental issue and were less willing to force land operators to change farming practices. Study findings revealed that farm structure. Factors were less useful in predicting attitudes toward groundwater pollution than social learning factors However, several farm structure variables were shown to be significant at the . 05 level. Respondents who cultivated more land, had higher debt to asset ratios, were more specialized in grain production, and perceived that production costs would increase if groundwater protection practices were adopted tended to perceive groundwater to be less important as an environmental issue and were less willing to force land operators to change farming practices.