Miracle-dz/UniFAR-FTUs huggingface dataset:
E-Tam: a revision of the Technology Acceptance Model to explain website revisits

Retaining visitors at a corporate website is arguably one of the most important objectives for e-commerce practitioners today. Unfortunately, it is also a notoriously difficult challenge. Little theory has been developed to understand why people return - or fail to return - to websites. In this paper we address this issue by developing a theoretical framework that models the factors influencing a visitor’s return to a website. The framework is adapted from the Technology Acceptance Model (TAM), originally developed by Davis et al. [6,7, 8]. A major revision involves the concept of perceived relative usefulness and perceived relative enjoyment as opposed to usefulness and enjoyment per se. This extension takes into account the notion that websites operate in a competitive environment, and that visitors judge the usefulness and enjoyment of a website relative to the competing websites to which they have access. The paper discusses five propositions that are derived from the revised framework. Implications for further research and practical guidelines for electronic commerce website designers are also addressed.
Nightwatch

Organized in the mid-1970s as a means of communal protection against livestock rustling and general thievery in Peru’s rugged northern mountains, the rondas campesinas (peasants who make the rounds) grew into an entire system of peasant justice and one of the most significant Andean social movements of the late twentieth century. Nightwatch is the first full-length ethnography and the only study in English to examine this grassroots agrarian social movement, which became a rallying point for rural pride. Drawing on fieldwork conducted over the course of a decade, Orin Starn chronicles the historical conditions that led to the formation of the rondas, the social and geographical expansion of the movement, and its gradual decline in the 1990s. Throughout this anecdotal yet deeply analytical account, the author relies on interviews with ronda participants, villagers, and Peru’s regional and national leaders to explore the role of women, the involvement of nongovernmental organizations, and struggles for leadership within the rondas. Starn moves easily from global to local contexts and from the fifteenth to the twentieth century, presenting this movement in a straightforward manner that makes it accessible to both specialists and nonspecialists. An engagingly written story of village mobilization, Nightwatch is also a meditation on the nature of fieldwork, the representation of subaltern people, the relationship between resistance and power, and what it means to be politically active at the end of the century. It will appeal widely to scholars and students of anthropology, Latin American studies, cultural studies, history, subaltern studies, and those interested in the politics of social movements.
The marine phosphorus cycle

Phosphorus introduced to the ocean must ultimately be removed if a steady state is to be maintained over geologic time. Aeolian input is insignificant, and there is evidently no hydrothermal contribution. Rivers dominate P-input to the ocean. The fluvial P-flux is poorly quantified due to the interactions of two factors: (1) man's influence on river-nutrient fluxes; and (2) inherent complexities in understanding the biological and inorganic associations of P in estuarine and coastal waters. Our best estimate of the natural or pre-man P-input flux is about 10 x 10/sup -9/ moles - P/cm/sup 2/-ocean surface/year. Of the identified flux of phosphorus to the sediments, about 90 percent is in the form of biogenic debris or its regeneration products. The burial of phosphatic fish debris is negligible. P-removal by direct reaction of phosphate in seawater with sea-floor basalts during mid-ocean ridge hydrothermal circulation is insignificant. P-removal by processes such as sorption on clay surfaces or formation of authigenic Fe and Al phosphate phases is presently unquantified and remains a serious uncertainty in the phosphorus cycle. The identified sources and sinks approximately balance, yielding a residence time for P in the oceans of about 10/sup 5/ yrs.
Mean Field Approximations for Heterogeneous Supermarket Models on Graphs

In this paper we consider a variation of the so called supermarket model with heterogeneous processing rates and underlying network structure that cause restrictions in load balancing. Servers exist on the vertices of a graph where an edge denotes communication between servers. Jobs arrive according to a Poisson process and are assigned by a dispatcher to a server with exponentially distributed processing times of heterogeneous rate. The processing rates may be different for each server thus The dispatcher randomly samples two servers connected in the graph and assigns the job to the shorter of the two queues with ties broken uniformly. This is the well known power-of-two policy applied on a graph topology. We take a mean field approach based on the generalised mean field approximation for heterogeneous objects by N. Gast and S. Allmeier (2022). We review existing mean field methods for homogeneous systems and compare the interpretations between the two. To this end, there is difficulty in establishing a scaling limit interpretation of the heterogeneous mean field for our model given the lack of a ’natural’ scaling scheme for the heterogeneous model on graphs. We suggest the following scaling regime for a system with arbitrary service rates and graph structure: replace each server by a cluster of servers all with processing rate equal to the replaced server and all clusters the same size. Then say that two servers are connected if their clusters are connected. We find that the mean field is equal for a server in the original system and any server in the corresponding cluster for any degree of scaling. Thus suggesting cluster scaling preserves the heterogeneity of the system. Following this we show the limit of the expected occupancy state for a given cluster k is equal to the mean field of corresponding server k from the original system. As such the heterogeneous mean field may be interpreted as an approximation for a finite system or the limit of the expected occupancy state for a sequence of cluster scaled systems. Mean Field Approximations for Heterogeneous Supermarket Models on Graphs iii
Journal of A ﬀ ective Disorders

Background: Irritability and the new DSM-5 diagnostic category of Disruptive Mood Dysregulation Disorder (DMDD) have been conceptualised as related to mood disorder. Irritability is common in Attention De ﬁ cit Hyperactivity Disorder (ADHD) but little is known about its association with depression risk in this group. This study aims to establish levels of irritability and prevalence of DMDD in a clinical sample of children with ADHD, and examine their association with anxiety, depression and family history of depression. Methods: The sample consisted of 696 children (mean age 10.9 years) with a diagnosis of ADHD, recruited from UK child psychiatry and paediatric clinics. Parents completed the Child and Adolescent Psychiatric Assessment, a semi-structured diagnostic interview, about their child. This was used to establish prevalence of DMDD, anxiety disorder and depressive disorder, as well as obtain symptom scores for irritability, anxiety and depression. Questionnaires assessed current parental depression, and family history of depression. Result: Irritability was common, with 91% endorsing at least one irritable symptom. 3-month DMDD prevalence was 31%. Children with higher levels of irritability or DMDD were more likely to have comorbid symptoms of anxiety, depression and a family history of depression. Limitations: Results are based on a clinical sample, so may not be generalizable to children with ADHD in the general population. Conclusions: Irritability and DMDD were common, and were associated with markers of depression liability. Longitudinal studies are needed to examine the association between irritability and depression in youth with ADHD as they get older.
Stationary subspace analysis of nonstationary covariance processes: Eigenstructure description and testing

Stationary subspace analysis (SSA) searches for linear combinations of the components of nonstationary vector time series that are stationary. These linear combinations and their number defne an associated stationary subspace and its dimension. SSA is studied here for zero mean nonstationary covariance processes. We characterize stationary subspaces and their dimensions in terms of eigenvalues and eigenvectors of certain symmetric matrices. This characterization is then used to derive formal statistical tests for estimating dimensions of stationary subspaces. Eigenstructure-based techniques are also proposed to estimate stationary subspaces, without relying on previously used computationally intensive optimization-based methods. Finally, the introduced methodologies are examined on simulated and real data.
Effect of frailty on short- and mid-term outcomes in vascular surgical patients.

Objective : Frailty is a multi-dimensional vulnerability due to age-associated decline. The impact of frailty on outcomes was assessed in a cohort of vascular surgical patients. Methods : Patients aged over 65 years with length of stay (LOS) > 2 days admitted to a tertiary vascular unit over a single calendar year were included. Demographics, mode of admission, diagnosis, mortality, LOS and discharge destination were recorded, as well as a variety of frailty-specific characteristics. The impact of frailty on LOS, discharge destination, survival and readmission rate was assessed using multivariate regression techniques. The ability of such frailty models to predict these outcomes was also assessed. Results : In total, 413 patients (median age 77 years) were followed up for a median of 18 months (range 12-24). In-hospital, 3- and 12-month mortality was 3.6%, 8.8%, and 15.4% respectively. ROC curve analysis revealed that frailty-based regression models were excellent predictors of 12-month mortality (area under ROC curve (AUC) = 0.81), prolonged LOS (AUC = 0.79) and discharge to a care institution (AUC = 0.84). A simple additive ‘frailty score’ using 6 key features retains strong predictive power for 12 month mortality (AUC = 0.83), discharge to a care institution (AUC = 0.78) and prolonged LOS (AUC = 0.74). This frailty score is also strongly associated with readmission (P<.001). Conclusions : Frailty in vascular surgery patients predicts a multiplicity of poorer outcomes. Optimal treatment should include identification of “at risk” patients and management of modifiable risk factors.
Recognizing and Linking Entities in Old Dutch Text: A Case Study on VOC Notary Records

The increased availability of digitised historical archives allows researchers to discover detailed information about people and companies from the past. However, the unconnected nature of these datasets presents a non-trivial challenge. In this paper, we present an approach and experiments to recognise person names in digitised notary records and link them to their job registration in the Dutch East India company’s records. Our approach shows that standard state-of-the-art language models have diﬃculties dealing with 18th century texts. However a small amount of domain adaption can improve the connection of information on sailors from diﬀerent archives.
Model-Based Control and Stability Analysis of Discrete-Time Polynomial Fuzzy Systems With Time Delay and Positivity Constraints

This paper proposes a novel Lyapunov stabilization analysis of discrete-time polynomial-fuzzy-model-based control systems with time delay under positivity constraint. The polynomial fuzzy model is constructed to describe the dynamics of a nonlinear discrete-time system with time delay. A model-based polynomial fuzzy controller is designed using nonparallel distributed compensation technique to stabilize the system while driving the system states to positive using the positivity constraints. The Lyapunov stability and positivity conditions are formulated as sum-of squares. To relax the conservativeness of the obtained stability results, two main methods are proposed in this paper: first, the piecewise linear membership functions (PLMFs) are used to introduce the approximate error between piecewise and the original membership functions into the stability analysis; and second, introduce the boundary information of the premise variables into the stability analysis since the premise variables hold rich nonlinearity information. A numerical example is given to demonstrate the effectiveness of the proposed approach.
Sustainable Agriculture and the Environment

Sustainable agriculture will continue indefinitely and will supply the world's food, fiber and esthetic needs of its citizens. Issues involving the environment are central to sustainable agriculture. Recorded history has many examples of civilizations and nations that suffered or even disappeared because their agriculture was not sustainable. Today, many aquatic and terrestrial ecosystems are showing stress because of agriculture practices that are not in harmony with the environment. Erosion, salinization, desertification, water pollution and climate change are affecting agricultural productivity in many nations. The agricultural practices identified with environmental degradation include overgrazing, poor irrigation practices, excessive row cropping leading to erosion, overuse or misuse of agricultural chemicals, and bringing land into production that is too fragile to grow crops. Corrective actions leading to a sustainable agriculture are necessary soon before the growing and more demanding world population requires food and fiber at levels that cannot be supplied with current agricultural systems. This will require major changes in the world's food growing patterns and approaches. Needed changes include research to find more appropriate crops and practices and using holistic principles in the development of agricultural systems. While free trade promises to raise living standards, benefits must accrue to all the population for agriculture to be sustainable. Otherwise, environmental degradation will continue as the poor gather firewood and water and use unstable lands for food. Developed nations have an obligation to help stabilize the environment by supporting policies and research that will lead to a more sustainable agriculture in all nations.
Observational longitudinal cohort study to determine progression to heart failure in a screened community population: the Echocardiographic Heart of England Screening Extension (ECHOES-X) study

Objectives Rescreen a large community cohort to examine the progression to heart failure over time and the role of natriuretic peptide testing in screening. Design Observational longitudinal cohort study. Setting 16 socioeconomically diverse practices in central England. Participants Participants from the original Echocardiographic Heart of England Screening (ECHOES) study were invited to attend for rescreening. Outcome measures Prevalence of heart failure at rescreening overall and for each original ECHOES subgroup. Test performance of N Terminal pro-B-type Natriuretic Peptide (NT-proBNP) levels at different thresholds for screening. Results 1618 of 3408 participants underwent screening which represented 47% of survivors and 26% of the original ECHOES cohort. A total of 176 (11%, 95% CI 9.4% to 12.5%) participants were classified as having heart failure at rescreening; 103 had heart failure with reduced ejection fraction (HFREF) and 73 had heart failure with preserved ejection fraction (HFPEF). Sixty-eight out of 1232 (5.5%, 95% CI 4.3% to 6.9%) participants who were recruited from the general population over the age of 45 and did not have heart failure in the original study, had heart failure on rescreening. An NT-proBNP cut-off of 400 pg/mL had sensitivity for a diagnosis of heart failure of 79.5% (95% CI 72.4% to 85.5%) and specificity of 87% (95% CI 85.1% to 88.8%). Conclusions Rescreening identified new cases of HFREF and HFPEF. Progression to heart failure poses a significant threat over time. The natriuretic peptide cut-off level for ruling out heart failure must be low enough to ensure cases are not missed at screening.
Development of a measure to assess the quality of user-developed applications

Building on work in software engineering and in end-user computing, this study developed and assessed a measure of user-developed applications quality. The quality construct comprises eight dimensions: reliability, effectiveness, portability, economy, user-friendliness, understandability, verifiability, and maintainability. In turn, each quality dimension is composed of a set of criteria. Finally, each criterion is measured by a series of items. The instrument was tested by means of a survey involving 110 end-users. Confirmatory factor analysis, using the partial least squares technique, was conducted. The results indicate that the 56-items instrument is reliable and valid, and that it can be a useful tool for researchers and for practitioners alike. <<ETX>>
Journal of Graph Algorithms and Applications a Visibility Representation for Graphs in Three Dimensions

This paper proposes a 3-dimensional visibility representation of graphs G = (V, E) in which vertices are mapped to rectangles floating in R 3 parallel to the x, y-plane, with edges represented by vertical lines of sight. We apply an extension of the Erd˝ os-Szekeres Theorem in a geometric setting to obtain an upper bound of n = 56 for the largest representable complete graph Kn. On the other hand, we show by construction that n ≥ 22. These are the best existing bounds. We also note that planar graphs and complete bipartite graphs Km,n are representable, but that the family of representable graphs is not closed under graph minors.
Oviposition and development in the glass frog Hyalinobatrachium orientale (Anura: Centrolenidae)

Descrevemos aqui caracteristicas da ovipostura e do desenvolvimento embrionario externo da perereca-de-vidro de Tobago, Hyalinobatrachium orientale . Os ovos sao quase sempre depositados na superficie abaxial das folhas (com uma excecao). Geralmente, sao usadas folhas de Heliconia sp. , mas, na ausencia destas, podem ser usadas folhas de Philodendron sp. e de palmeiras. As desovas contem 28,0 ± 5,3 ovos (media ± DP) e os ovos possuem diâmetro de 1,86 ± 0,11 mm. O comportamento de um casal em amplexo foi acompanhado por mais de cinco horas; o casal girou diversas vezes em torno de uma pequena area da folha, depositando os ovos em uma formacao espiral apertada. As caracteristicas embrionarias externas foram observadas por microscopia electronica de varredura. A ciliacao e extensa ate o momento da eclosao, quando e perdida; as brânquias externas sao curtas, e nao existe uma glândula de cemento. Celulas glandulares de eclosao foram detectadas na superficie anterodorsal da cabeca a partir do dia Dia 4 apos a ovipostura e persistiram ate pelo menos o Dia 10, e a eclosao ocorreu entre os Dias 9 e 16. Durante esse periodo, foi observado o desenvolvimento progressivo do comprimento da cauda, da pigmentacao superficial, do enovelamento do intestino e das caracteristicas do disco oral. Apos a eclosao, larvas criadas por seis semanas cresceram 37% no comprimento e tiveram seu peso triplicado, mas permaneceram no estagio 25 de Gosner.
Exploring the aftermath: Work demands, workplace violence, and job satisfaction among nurses in a public hospital in the post-COVID-19 era

Background Despite the shift from the COVID-19 pandemic to an endemic phase, many individuals, including nurses, may still be facing psychosocial challenges after enduring three years of the pandemic. Although the anticipation that psychosocial issues, such as work demand and workplace violence, have diminished and nurses’ job satisfaction has improved, there is a scarcity of studies in Indonesia investigating this matter. Objective This study aimed to 1) explore the current state of nurses’ work demands, workplace violence, and job satisfaction and 2) examine the relationships between work demands, workplace violence, and respondents’ characteristics with nurses’ job satisfaction. Methods The study employed a cross-sectional survey design involving 247 nurses from a regional general hospital in Jakarta, Indonesia. Simple random sampling was used to select the participants, and the Copenhagen Psychosocial Questionnaire (COPSOQ) III was used for data collection. Data were analyzed using multiple linear regression. Results The types of cognitive demands (M = 12.46, SD = 3.461), demands for hiding emotion (M = 11.66, SD = 3.554), and work pace (M = 9.87, SD = 2.847) scored an average close to or within the “sometimes/quite extensive” range on the scale. All types of workplace violence and conflicts occurred among nurses (Mean range = 1.21-2.57). Nurses perceived themselves as fairly satisfied with their job (M = 18.47, SD = 3.18). The results of the multiple linear regression indicated that nurses’ job satisfaction was predominantly influenced by workplace violence (β = -0.191), followed by the type of care unit (β = -0.167) and work demands (β = -0.126). These factors collectively accounted for 9.1% of the variance in the job satisfaction variable (R2 = 0.091, p <0.005) Conclusion Despite the decreasing number of COVID-19 cases, nurses still experience high work demands and continue to face workplace violence. These factors, as well as the type of care unit, influence nurses’ job satisfaction. Therefore, further actions need to be taken by hospital management to address these psychosocial conditions. It is recommended that future research explore the role of nurse managers in managing the psychosocial factors associated with these three factors.
Using the Interactive White Board in Teaching and Learning - An Evaluation of the SMART CLASSROOM Pilot Project

In 2008, an educational organization that works in 60 countries across the world, established a pilot project whereby smart classrooms were installed for use in six middle and senior high schools in Israel. In this project, each school received 10 Interactive White Boards (IWBs) (25% of the total number of classrooms in the school), 32 laptops, internet connection, communication software and teacher training. Formative evaluation accompanied the pilot project for two years in order to examine the effects of integrating technology into instruction on teachers, students, and the school community. The findings indicated the following: a) student motivation and engagement in the learning process increased when studying with the IWB; b) teachers reported on their professional development and enhanced technology skills. The findings also showed that the integration of technology into instruction posed some difficulties and challenges, such as a sense of over-burdening among teachers. The main conclusions were the following: a) there is a need to focus on the pedagogical training of the teachers, with an emphasis on the ways that technology can assist interactive teaching; b) in order to help relieve the over-burdening of teachers, a database of instructional tools should be established providing suggestions for lesson plans and instructional materials; c) accessibility to the technology should be extended to more teachers and students by adding smart classrooms to every school in the project.
Evidence for stabilizing selection at pleiotropic loci for human complex traits

How genetic variation contributes to phenotypic variation is a central question in genetics. Association signals for a complex trait are found throughout the majority of the genome suggesting much of the genome is under some degree of genetic constraint. Here, we develop a intraspecific population genetics approach to define a measure of population structure for each single nucleotide