Miracle-dz/UniFAR-FTUs huggingface dataset:
Meta objects for access control: a formal model for role-based principals

Object-based programming is becoming more and more popular and is currently conquering the world of distributed programming models. In object-based systems access control is often based on capabilities, despite the difficulty to keep track of their distribution. Access control lists are used only rarely, as information about the principal on whose behalf an operation is to be executed is needed and it is difficult to determine which principal information to use for a specific method invocation. Current object-based systems use domain-based or thread-based principals. Domains or threads are associated with principals. If a specific object or a specific thread invokes a method, the invocation is always executed on that principal’s behalf. Both policies suffer from the reference proxy problem: A low privileged object can pass references to a highly privileged object and may animate it to call methods with its high privileges via these obtained references (Unix S-bit problem). As there are no formal models for such systems, we cannot decide if such a situation actually occurs. On the other hand, most mandatory access control policies (where we have formal models) are too restrictive for many applications. In this paper, we introduce role-based principals. An object domain may act in different roles to different other parties. Each object reference to objects of other domains is associated with a specific role, which determines trust, authentication (i.e., which principal information to use) and allowed data flow via the reference. Exchanged references automatically inherit the role. By initially defining such roles, we can establish a security policy on a very high abstraction level. We provide a formal model and present two examples, where we show that we can prove that accidental propagation of references and unintentional use of privileges are prevented.
Marginal Deformations with U(1)^3 Global Symmetry

We generate new 11-dimensional supergravity solutions from deformations based on U(1)^3 symmetries. The initial geometries are of the form AdS_4 x Y_7, where Y_7 is a 7-dimensional Sasaki-Einstein space. We consider a general family of cohomogeneity one Sasaki-Einstein spaces, as well as the recently-constructed cohomogeneity three L^{p,q,r,s} spaces. For certain cases, such as when the Sasaki-Einstein space is S^7, Q^{1,1,1} or M^{1,1,1}, the deformed gravity solutions correspond to a marginal deformation of a known dual gauge theory.
Motivation and creativity.

A popular stereotype of creative people is that they approach their work with a kind of crazed intensity, often forgoing sleep, food, and other seeming necessities of life in order to advance their creative work. Undoubtedly, this view is one source of the widespread belief that creativity stems from madness. Although the connection between creativity and insanity remains a controversial point, there is considerable anecdotal and empirical evidence that creative production does require a high level of motivation. For example, the novelist John Irving reported spending as many as 12 hours per day, for several consecutive days, while writing his novels. When asked what drove him to work so hard, even years after attaining wide readership, fame, and financial success, he replied: “The unspoken factor is love. The reason I can work so hard at my writing is that it's not work for me” (from an interview reported in Amabile, 1989, p. 56). What motivation drives creative activity? Is it generally based in the love that Irving describes? Does it derive from the desire to attain ever more wealth and fame, or are there other motivational forces at work? This chapter reviews theory and research on the motivation for creativity, revealing that, although creativity can arise from a complex interplay of motivational forces, motivation that stems from the individual's personal involvement in the work - love, if you will - is crucial for high levels of creativity in any domain.
Fluorescent brightener inhibits apoptosis in baculovirus-infected gypsy moth larval midgut cells in vitro

Abstract Fluorescent brighteners significantly lower the LC50 and LT50 in a variety of nucleopolyhedrovirus–insect host systems. In larvae of the gypsy moth, Lymantria dispar (L.), a European NPV strain of virus (LdMNPV) does not normally replicate in the midgut, but addition of a fluorescent brightener (Calcofluor M2R) to the virus suspension results in productive infections. In the current study, we show that LdMNPV also does not replicate in a larval midgut primary cell culture system unless a fluorescent brightener (Blankophor P167) is added. Morphological and cellular changes characteristic of apoptotic cell death were noted in infected midgut cells in vitro. We used the TUNEL assay to measure apoptosis in virus-challenged midgut cell cultures at 24–48 h post-inoculation. A significant decrease in apoptotic midgut cells was noted in the presence of 0.01 M brightener. The inhibition of apoptosis and presumptive inhibition of shedding of infected midgut cells in the presence of fluorescent brightener in the insect midgut appeared to promote virus replication and are likely to be partly responsible for enhancement of LdMNPV activity that is observed in gypsy moth larvae.
Genetic and environmental influences on temperament: The Polish-German twin study, based on self-report and peer-rating

Among the criteria for a personality paradigm the following three are the most crucial: biological basis (e. g., genetic contribution to the phenotypic variance), universality (existence of traits in different cultures) and reality (possibility to measure traits by different methods). The present study combines all three criteria to explore the impact of genetic and environmental factors on temperamental traits, as stipulated by Strelau's regulative theory of temperament, across two culturally different samples (Polish and German), and by means of two diagnostic methods (self-report and peer-rating). The analysis was conducted on data obtained from 1009 same-sex pairs of twins (German sample) and 546 same-sex pairs of twins (Polish sample). For each subject the self-report as well as rating from two independent peers was recorded by both the Polish and German versions of the Formal Characteristics of Behavior-Temperament Inventory. Results demonstrate substantial heritability of temperamental traits, alth.
Comparing dental students’ perceptions of their educational environment in Northwestern Saudi Arabia

Objectives: To compare the perceptions of dental students over a 5-year period. Methods: This cohort study was carried at Taibah University, College of Dentistry, Al-Madinah Al-Munawwarah, Saudi Arabia between 2009 and 2014. Data was obtained using the Dundee Ready Education Environment Measure (DREEM), which consists of 50 items, 4 of these were irrelevant to this cohort and were excluded. All students registered in 2009 were included and followed up in 2014. Their responses were compared using the paired student’s t-test. Results: Thirty-four students completed the questionnaire in 2009, and 30 of them participated in 2014 (12% drop out rate). The mean domain and total scores decreased over time. The mean scores for 6 items decreased significantly, while 4 of them had a significant increase. The lowest mean score in 2009 regarding support for stressed students increased (p=0.004) in 2014. However, the highest mean score in 2009 related to having a good social life, reduced (p=0.007) in 2014. This could be an indication of the high workload and its impact on their social lives. Conclusion: Student’s perceptions were relatively low at the beginning, and remained low throughout the study. There were no significant changes in mean domain, and total scores and although scores of some items improved, most decreased over the study period.
Applying Naive Bayesian Networks to Disease Prediction: a Systematic Review

Introduction: Naive Bayesian networks (NBNs) are one of the most effective and simplest Bayesian networks for prediction. Objective: This paper aims to review published evidence about the application of NBNs in predicting disease and it tries to show NBNs as the fundamental algorithm for the best performance in comparison with other algorithms. Methods: PubMed was electronically checked for articles published between 2005 and 2015. For characterizing eligible articles, a comprehensive electronic searching method was conducted. Inclusion criteria were determined based on NBN and its effects on disease prediction. A total of 99 articles were found. After excluding the duplicates (n= 5), the titles and abstracts of 94 articles were skimmed according to the inclusion criteria. Finally, 38 articles remained. They were reviewed in full text and 15 articles were excluded. Eventually, 23 articles were selected which met our eligibility criteria and were included in this study. Result: In this article, the use of NBN in predicting diseases was described. Finally, the results were reported in terms of Accuracy, Sensitivity, Specificity and Area under ROC curve (AUC). The last column in Table 2 shows the differences between NBNs and other algorithms. Discussion: This systematic review (23 studies, 53,725 patients) indicates that predicting diseases based on a NBN had the best performance in most diseases in comparison with the other algorithms. Finally in most cases NBN works better than other algorithms based on the reported accuracy. Conclusion: The method, termed NBNs is proposed and can efficiently construct a prediction model for disease.
Severe pneumonia in Mozambican young children: clinical and radiological characteristics and risk factors.

BACKGROUND Pneumonia is a leading cause of hospitalization and death among children in Africa. We describe the clinical presentation of severe pneumonia among hospitalized children in a malaria endemic area with a high prevalence of HIV infection. METHODS As part of a 2-year prospective study of radiologically confirmed pneumonia, chest radiographs, malaria parasite counts and bacterial blood cultures were systematically performed for children 0-23 months admitted with severe pneumonia. Radiographs were interpreted according to WHO guidelines. HIV tests were performed during a 12-month period. RESULTS Severe pneumonia accounted for 16% of 4838 hospital admissions among children 0-23 months; 43% of episodes had endpoint consolidation, 15% were associated with bacteremia and 11% were fatal. Fever, cough >3 days, crepitations, hypoxemia and absence of malaria parasitemia were associated with radiologically confirmed pneumonia. Nineteen per cent of children with severe pneumonia and 27% with radiologically confirmed pneumonia had clinical malaria. HIV-prevalence was 26% among children hospitalized with severe pneumonia and HIV-testing results. HIV infection, anaemia, malnutrition, hypoxemia and bacteremia were associated with fatal episodes of severe pneumonia. CONCLUSION Treatment of admitted children with severe pneumonia is complicated in settings with prevalent HIV and malaria. Children with severe pneumonia and clinical malaria require antibiotic and antimalarial treatment. In addition to vertical programs, integrated approaches may greatly contribute to reduction of pneumonia-related mortality.
Experiences of Discrimination among African American, Asian American, and Latino Adolescents in an Urban High School

Interviews and participant observation are used to describe how ethnic minority students in an urban high school experience discrimination. The findings suggest critical variations among students that contributed to a hostile school environment. Asian American students discussed physical and verbal harassment by peers, while Black and Latino students reported discrimination by adults, such as teachers, police, and shopkeepers. Findings suggested a circular process whereby teachers preferred the Asian American students, often basing their preference on model minority beliefs, and the African American and Latino adolescents resented that teacher bias and thus harassed the Asian American students. Asian American and Latino students also expressed intraracial tensions around issues of language, immigration, and assimilation. Findings underscore the importance of exploring adolescents’ subjective experiences of discrimination.
Psychiatric disorders and communication

The aetiology of mental illness is complex and not fully understood. Conditions such as schizophrenia are widely accepted as disorders of the brain but a comprehensive neurobiological account of such conditions remains elusive (Meyer and Feldon 2010). A complex interplay of genetic factors, perinatal exposure to environmental insults, early developmental problems and/or early adversity such as abuse, and lifestyle factors are thought to be involved. Many psychiatric disorders have their origin in adolescence. This is a time of brain development particularly involving the prefrontal cortex (Blakemore 2008). It is also a period of life when individuals may take risks which expose them to jeopardizing that cognitive development, such as smoking cannabis which is thought to contribute to gene expression in some individuals with an underlying genetic susceptibility towards schizophrenia (Barkus and Murray 2010). The aetiology of each of the disorders considered in this chapter will be addressed in more detail within the relevant sections.
Facets of the Generalized Cluster Complex and Regions in the Extended Catalan Arrangement of Type A

In this paper we present a bijection between two well known families of Catalan objects: the set of facets of the $m$-generalized cluster complex $\Delta^m(A_n)$ and that of dominant regions in the $m$-Catalan arrangement ${\rm Cat}^m(A_n)$, where $m\in\mathbb{N}_{>0}$. In particular, the map which we define bijects facets containing the negative simple root $-\alpha$ to dominant regions having the hyperplane $\{v\in V\mid\left\langle v,\alpha \right\rangle=m\}$ as separating wall. As a result, it restricts to a bijection between the set of facets of the positive part of $\Delta^m(A_n)$ and the set of bounded dominant regions in ${\rm Cat}^m(A_n)$. Our map is a composition of two bijections in which integer partitions in an $m$-dilated $n$-staircase shape come into play.
Ethnic minority business and the employment of illegal immigrants

Based on detailed case histories of South Asian workers and their co-ethnic employers in the West Midlands clothing and catering industries, this paper examines the use of illegal immigrant labour in small ethnic minority firms and attempts to tease out its implications for the migrants themselves, their employers and the broader national interest. To establish a proper context, we begin with a review of the recent literature on the structural changes – principally the confluence of globalization and post-industrialism – which have generated a seemingly unstoppable flow of labour migration; and the official state policies that have forced much of it underground. Our own case histories are seen as one of countless local expressions of this clash between economic and political imperatives, a clash which effectively criminalizes employers and workers for providing a positive economic and social contribution to the wider good. In the present case, it is only by employing immigrant labour that struggling entrepreneurs can survive in hyper-competitive sectors of the economy and the stark choice is between official tolerance of law-breaking or driving many of these enterprises to the wall.
Genetic control of adult neurogenesis: interplay of differentiation, proliferation and survival modulates new neurons function, and memory circuits

Within the hippocampal circuitry, the basic function of the dentate gyrus is to transform the memory input coming from the enthorinal cortex into sparse and categorized outputs to CA3, in this way separating related memory information. New neurons generated in the dentate gyrus during adulthood appear to facilitate this process, allowing a better separation between closely spaced memories (pattern separation). The evidence underlying this model has been gathered essentially by ablating the newly adult-generated neurons. This approach, however, does not allow monitoring of the integration of new neurons into memory circuits and is likely to set in motion compensatory circuits, possibly leading to an underestimation of the role of new neurons. Here we review the background of the basic function of the hippocampus and of the known properties of new adult-generated neurons. In this context, we analyze the cognitive performance in mouse models generated by us and others, with modified expression of the genes Btg2 (PC3/Tis21), Btg1, Pten, BMP4, etc., where new neurons underwent a change in their differentiation rate or a partial decrease of their proliferation or survival rate rather than ablation. The effects of these modifications are equal or greater than full ablation, suggesting that the architecture of circuits, as it unfolds from the interaction between existing and new neurons, can have a greater functional impact than the sheer number of new neurons. We propose a model which attempts to measure and correlate the set of cellular changes in the process of neurogenesis with the memory function.
Characteristics of the Respiratory Muscle Strength of Women and Men at Different Training Levels

Abstract Introduction. The objective of the study was to determine the maximal inspiratory mouth pressure (PImax) of highly trained male and female athletes competing in endurance sports and of non-training students of both sexes. Analysis was conducted of the dependence of PImax levels on somatic indices and training experience. The reproducibility of the method for measuring PImax index was determined. Material and methods. The study examined a total of 234 training and non-training individuals (78 women and 156 men). The test subjects were measured for PImax, as well as inspiratory time, active time, passive time and diaphragm relaxation time. A group of 59 women and men (training and non-training) were tested a second time within 5-7 days of the first test to determine the reproducibility of the PImax measurements. Results and conclusion. The measurements were found to be highly reproducible (between the first and second tests no statistically significant differences were found, all spirometric indices included in the study were shown to demonstrate a significant correlation, and total error for all of the analyzed indexes was between 11.1 and 24.3%). Reference ranges for PImax were determined for women and men at different training levels. PImax was shown to have a positive dependence on somatic indices characterizing male and female body mass.
Solitary cutaneous myofibromas in adults: report of six cases and discussion of differential diagnosis

Six solitary, dermal or subcutaneous lesions occurring in adult patients are presented. These masses had a circumscribed, lobulated configuration; they were composed of fusiform and epithelioid cells that lacked atypical nuclear features. The pattern of growth featured fascicles and nests, a myxofibrous stroma, and prominent blood vessels with a focally “hemangiopericytoid” appearance. Immunohistochemical analyses showed uniform reactivity for vimentin and alpha isoform‐actin, with negativity for desmin and neural determinants. The overall appearance of the lesions was similar to that of “infantile myofibromastosis,” and corresponded to previous descriptions of “solitary myofibroma(tosis)” in adults. Immunophenotypic and ultra‐structural support exists for a proposed myofibroblastic nature for such proliferations. Differential diagnostic considerations include neurothekeomas, plexiform fibrous histiocytomas, nodular fasciitis, cutaneous inflammatory pseudotumors, dermatomyofibromas, leiomyomas, and other forms of fibromatosis affecting the skin and superficial soft tissues.
Predicting the Support of Same-Sex Relationship Rights Among Social Work Students

Since the 1980s, the United States has seen several instances of legislative action on the topic of same-sex marriages and civil unions. As some studies explored public reactions to such laws, the perspectives of social workers and social work students have mostly been ignored. In addressing part of this oversight, this paper looks at the approval of same-sex relationship rights among 571 heterosexual social work students enrolled in 12 U.S. colleges. In having an explanatory scope, the article focuses a multivariate analysis of potential antecedents to these policy preferences. Consistent with attribution theory, the strongest associations were located in the belief that sexual orientations are voluntary. In addition, students who were surrounded by homophobic parents and peers, or had little contact with gays or lesbians, were against the expansion of broader gay and lesbian relationship rights. Conversely, individuals who ignored traditional gender roles and authoritarian principles, as well as did not attend regular religious services, were more amiable to extending the relationship rights of sexual minorities.
Critical Review of Drilling Foam Rheology

In this paper, problems related to the rheology of drilling foams are addressed. Both empirical and analytical foammodeling approaches are considered. The effects of different fluid parameters on the rheology of foams are thoroughly investigated. A rigorous model comparison is made to evaluate the predictions of the models. Finally, a semi -empirical modeling approach is recommended based on analysis of the analytical and empirical models.
Prevalence of the polymorphism MTHFR A1298C and not MTHFR C677T is related to chromosomal aneuploidy in Brazilian Turner Syndrome patients.

BACKGROUND Dysfunctions in the folate metabolism can result in DNA hypomethylation and abnormal chromosome segregation. Two common polymorphisms of this enzyme (C677T and A1298C) reduce its activity, but when associated with aneuploidy studies the results are conflicting. The objective of the present study is to analyze the MTHFR gene polymorphisms in women with Turner Syndrome and in a control group, correlating the findings to the chromosomal aneuploidy. METHODS The study comprised 140 patients with Turner Syndrome, of which 36 with chromosome mosaicism and 104 non-mosaics, and a control group of 209 fertile and healthy women without a history of any offspring with aneuploidy. Polymorphisms C677T and A1298C were studied by RFLP-PCR and the results were statistically analyzed. RESULTS The frequency of genotypes MTHFR 677CC, 677CT and 677TT in the patients with Turner Syndrome and chromosome mosaicism was, respectively, 58.3%, 38.9% and 2.8%. Among the patients with non-mosaic Turner Syndrome, 47.1% presented genotype 677CC, 45.2% genotype 677CT, and 7.7% genotype 677TT. Among the 209 individuals of the control group, genotypes 677CC, 677CT and 677TT were found at the following frequencies: 48.3%, 42.1% and 9.6%, respectively. As for polymorphism A1298C, the patients with Turner Syndrome and chromosome mosaicism presented genotypes 1298AA, 1298AC and 1298CC at the following frequencies: 58.3%, 27.8% and 13.9%, respectively. Among the non-mosaic Turner Syndrome patients, genotype 1298AA was found in 36.5%, genotype 1298AC in 39.4%, and genotype 1298CC in 22.1%. In the control group, genotypes 1298AA, 1298AC and 1298CC were present at the following frequencies: 52.6%, 40.7% and 6.7%, respectively. CONCLUSION No correlation was observed between the MTHFR gene polymorphism 677 and chromosomal aneuploidy in the Turner Syndrome patients. However, the MTHFR gene polymorphism at position 1298, mainly genotype 1298CC that reduces the enzyme efficiency, was more frequent in the group of Turner Syndrome patients, suggesting its involvement in mechanisms related to chromosomal imbalances.