Miracle-dz/UniFAR-FTUs huggingface dataset:
Attendance and Retention of Older Adults in School-Based Volunteer Activities: The Role of School Climate

ABSTRACT This study examined the relationship between school climate (e.g., safety, resources, learning environment) and average weekly attendance (hours/week) and retention (total weeks volunteered) of older adults in school-based volunteer roles within the Baltimore Experience Corps Trial. The sample included 298 older adults (age 67.3 ± 5.9; 86.9% female; 91.3% African American). We assessed eight dimensions of school climate rated by school staff and students in grades 3–5 from 25 elementary and elementary/middle schools as predictors of older adult attendance and retention using linear mixed-effects and Cox regression models, respectively. Volunteers in schools with worse staff ratings of school safety were more likely to discontinue volunteering than volunteers in schools with better self-reported safety ratings (hazard ratio (HR): 0.59; 95% confidence interval (CI): 0.36, 0.98). Similar trends were observed for resources (e.g., programs for students with learning disabilities, school supplies; HR: 0.63; CI: 0.35, 1.11), learning environment (HR: 0.62; CI: 0.34, 1.12) and overall satisfaction (HR: 0.67; CI: 0.39, 1.15). Student ratings of school climate did not predict volunteer attendance or retention. Results suggest that positive school climate can contribute to retention of volunteers and should be considered an important component of volunteer program development.
Core professional nursing values as experienced by baccalaureate nursing students who are men

Experts have called for greater diversity in the nursing workforce; however, men remain underrepresented in the nursing profession. The presence of cultural dissonance among male nursing students has been documented in prior research but little is known about their values that are culturally influenced. The purpose of this study was to understand and interpret the meaning of core professional nursing values to male baccalaureate nursing students. The research question was: what is the meaning of core professional nursing values to nursing students who are men? The study setting was an undergraduate baccalaureate school of nursing in the Midwest. Using a purposive, convenience sampling method and van Manen’s interpretive phenomenological method, ten semistructured interviews were conducted with nine participants. Documents and images were also analyzed. Data analysis followed the hermeneutic process. The overarching theme of this study was caring, illustrated by the metaphor of a puzzle. In the first theme, entering program with pieces of the puzzle of caring, participants’ personal values aligned with those of the nursing profession and professional values began to form before the nursing education experience. The second theme, finding more pieces of caring, included subthemes of disconnect and change in professional nursing values during the nursing program. Caring as patient-centered relationships (theme three) involved patient interactions, honesty, teamwork, respect and dignity, and privacy/confidentiality. A fourth theme of caring as helping was described in subthemes of altruism, empathy/compassion, advocacy, and competency and safety. Solving the puzzle of caring was theme five, as participants described learning through
Wideband Sidelobe-Level Reduced $Ka$ -Band Metasurface Antenna Array Fed by Substrate-Integrated Gap Waveguide Using Characteristic Mode Analysis

substrate-integrated gap waveguide (SIGW)-fed metasurface antenna (metantenna) array with nonuniform excitation is proposed for wideband operation and sidelobe-level (SLL) reduction at millimeter-wave <italic>Ka</italic>-band. To achieve wideband and low profile, a <inline-formula> <tex-math notation="LaTeX">$2 \times 2$ </tex-math></inline-formula> square patch-based metasurface is introduced based on characteristic mode analysis (CMA). The ridged microstrip-fed slot is employed to excite the metasurface, while the mushroom-like patches are positioned around feeding lines to operate as the SIGW for suppressing the undesired modes. Due to the compactness of the proposed SIGW, the amplitude of each element is controllable using unbalanced T-junctions. A nonuniformly excited <inline-formula> <tex-math notation="LaTeX">$4 \times 4$ </tex-math></inline-formula> antenna array is designed and fabricated for validation. The measured results show an impedance bandwidth (<inline-formula> <tex-math notation="LaTeX">$\vert \text{S}_{11}\vert < -10$ </tex-math></inline-formula> dB) of full <italic>Ka</italic>-band with a 3 dB gain bandwidth of 28–40 GHz (35.3%) and SLLs less than −12.1 and −15.6 dB in the E- and H-planes, respectively.
Monotone and nonmonotone clines with partial panmixia across a geographical barrier

The number of clines (i.e., nonconstant equilibria) maintained by viability selection, migration, and partial global panmixia in a step-environment with a geographical barrier is investigated. Our results extend the results of T. Nagylaki (2016, Clines with partial panmixia across a geographical barrier, Theor. Popul. Biol. 109) from the no dominance case to arbitrary dominance and to various other selection functions. Unexpectedly, besides the usual monotone clines, we discover nonmonotone clines with both equal and unequal limits at \begin{document}$ \pm\infty $\end{document} .
Unusual bridged site for adsorbed oxygen adatoms: Theory and experiment for Ir{100}–(1×2)–O

The structure of oxygen adsorbed on Ir{100} has been determined by density functional theory slab calculations and quantitative low energy electron diffraction. The two studies produce essentially identical results, experiment providing a benchmark for the first principles calculation, while the latter provides a more complete understanding of the structure. Oxygen forms a (1×2) overlayer with adsorption on the bridge site: an unusual result for oxygen. There is a significant row pairing of the iridium atoms in the surface layer which strongly stabilizes the structure, and is one of the main factors favoring the bridge site occupation and the (1×2) configuration.
One-dimensional turbulence modelling of incompressible temporally developing turbulent boundary layers with comparison to DNS

ABSTRACT The incompressible temporally developing turbulent boundary layer (TBL) is analysed using the map-based stochastic one-dimensional turbulence (ODT) model. The TBL is a canonical flow problem, which is, in the present study, formed by a planar moving wall and a free stream at rest. An understanding of this idealised flow is of fundamental relevance for the numerical analysis of turbulent boundary-layer-type flows. In the present ODT simulations, the flow variables are resolved on all scales along a wall-normal, one-dimensional domain. These variables are evolved by a deterministic and a stochastic process. The latter models the effect of turbulent advection and pressure fluctuations, whereas the former represents molecular diffusion. The model is appropriate for high Reynolds numbers for which the turbulence field exhibits a broad range of scales and is notionally featureless. We show that ODT is able to capture salient features of the TBL by comparing the various statistics with available reference direct numerical simulation (DNS) results for different bulk Reynolds numbers in the range using fixed model parameters. The influence of the model parameters is analysed for and optimal parameter values are provided. The results discussed in this paper suggest that ODT is an economical and reasonably accurate approach for the simulation of transient turbulent boundary-layer-type flows.
Hemispheric injection of magnetic helicity by surface flux transport

Aims. We estimate the injection of relative magnetic helicity into the solar atmosphere by surface flux transport over 27 solar cycles (1700–2009). Methods. We determine the radial magnetic field evolution using two separate surface flux transport models: one driven by magnetogram inputs and another by statistical active region insertion guided by the sunspot number record. The injection of relative magnetic helicity is then computed from this radial magnetic field together with the known electric field in the flux transport models. Results. Neglecting flux emergence, solar rotation is the dominant contributor to the helicity injection. At high latitudes, the injection is always negative/positive in the northern/southern hemisphere, while at low latitudes the injection tends to have the opposite sign when integrated over the full solar cycle. The overall helicity injection in a given solar cycle depends on the balance between these two contributions. This net injected helicity correlates well with the end-of-cycle axial dipole moment.
Effect of roughness on emulsification physics and phase inversion

Emulsions, a kinetically stable dispersion of droplets within a second, immiscible fluid, are industrially important. Phase inversion is the process by which the dispersed phase becomes continuous and vice versa. This is exploited in industry, for example in churning cream to butter in the food industry, or use of the phase inversion temperature emulsification method in the transport and production of asphalt for roads. This thesis considers emulsions stabilised by solid particles, known as Pickering emulsions. Whether the dispersed phase is oil or water is thought to be governed by particle wettability. It has previously been demonstrated that emulsions comprised of limonene, water and fumed silica particles exhibit complex emulsification behaviour as a function of composition and the duration of the emulsification step. Most notably the system can invert from being oil-continuous to being water-continuous under prolonged mixing. Here, we investigate this phenomenon experimentally for the regime where water is the majority liquid. We prepare samples using a range of different emulsification times and we examine the final properties in bulk and via confocal microscopy. We use the images to quantitatively track the sizes of droplets and clusters of particles. We find that a dense emulsion of water droplets forms initially which is transformed, in time, into a water-in-oil-in-water multiple emulsion with concomitant changes in droplet and cluster sizes. In parallel we carry out rheological studies of water-in-limonene emulsions using different concentrations of fumed silica particles. We unite our observations to propose a mechanism for inversion based on the changes in flow properties during emulsification. An in-depth explanation of image processing and analysis techniques is given, including code from matlab. It has been demonstrated repeatedly that the variation in surface wettability with roughness is non-monotonic. Historic studies are based on measuring maximum capillary pressure of Pickering emulsions stabilised by particles of
Syndromic Management Approach and Wet Mount Microscopy of Trichomonas vaginalis in Pregnant Women and Sexually Transmitted Infection Clinic Attendants in Merawi Health Center, Merawi, Amhara Regional State, Ethiopia

Background: Trichomonas vaginalis is a flagellated single cell protozoan parasite, which carries the distinction of being the only truly sexually transmitted parasitic infection in humans. Aim: To determine the prevalence of Trichomonas vaginalis among pregnant women and sexually transmitted infection clinic attendants in Merawi Health center. Syndromic management approach was also evaluated for its effective diagnosis of trichomoniasis. Methodology: In this study, a total of 222 women were enrolled. Majority of them were in the age group of 15-25 years (48.6%, 108). Identification of the Trichomonas vaginalis trophozoites was performed by wet mount microscopy of vaginal samples (vaginal Research Article Ademe et al.; ISRR, Article no. ISRR.2013.003 31 discharge and vaginal swab) and clinical diagnosis by the syndromic management approach was performed by health workers in the health center. Result: Syndromic management approach has identified 4 women (1.8%) who had selfreported symptoms related to trichomoniasis. However, the laboratory wet mount diagnosis has identified 14 (6.3%) women who were positive for the trophozoites of Trichomonas vaginalis. The sensitivity of syndromic management approach with respect to the wet mount microscopy was 21.4%. Conclusion: Syndromic management approach is highly insensitive in screening out trichomoniasis, even, as compared with the less sensitive laboratory test (wet mount microscopy). Hence, we support the need for improved diagnostic parameters to reduce adverse trichomoniasis associated reproductive health outcomes.
The clinical observation of enhancing recovery of gastrointestinal function after cesarean section by gum chewing

Objective To observe the effects of gum chewing on the recovery of gastrointestinal function after cesarean section.Methods From Jan 2006 to June 2006,120 parturients who underwent cesarean section were selected and randomly separated into two groups.Sixty parturients were asked to chew gum three times after operation.To compare the differences between two groups in complaints such as nausea and abdominal distention,the first passage time of flatus and the first defecation time.Results There were significant differences between gum-chewing group and control group in both first passage time of flatus,first defecation time(P0.01) and occurrence of complaints(P0.05). Conclusion Gum chewing has positive effect on recovery of gastrointestinal function after cesarean section.As a simple,convenient and safe procedure,gum chewing could be used as an accessory therapy in recovery of gastrointestinal function after operation.
MODELLING AND FORECASTING STOCK MARKET VOLATILITY OF NASDAQ COMPOSITE INDEX

On the NASDAQ Composite Index from March 1971 to April 2019 it appears that the data is not stationary. For this reason, differentiation is needed by finding the value of stock returns from the NASDAQ Composite Index data from March 1971 to April 2019. After differentiating by looking for return values, the next analysis can be done, namely looking for the ARIMA model. Finding an ARIMA model using conventional analysis will require a long analysis time. So to shorten the analysis process using the EViews 10 statistical program. The results obtained after using the EViews program are getting the ARIMA model (8.0,6). The ARIMA model (8,0,6) was chosen because it has the smallest AIC value of 12,664073. This can be used as a reference later that the ARIMA model (8.0,6) is the best model in conducting forecasting. After that, the GARCH model is continued which aims to determine the ARIMA-GARCH model combination model. From the results of the analysis, it is known that the best model for forecasting the return value of the NASDAQ Composite Index is a combination of ARIMA (8.0,6)-EGARCH (1,1) models, which from the results of this analysis are known for fluctuating return values and index values for NASDAQ for one year in the future it is stagnant and does not show a trend.
Kinetic approach to defect reduction in directed self-assembly

Abstract. As a potential solution to next-generation nanolithography, directed self-assembly (DSA) of block copolymers (BCPs) is still restrained in high-volume manufacturing primarily due to its defectivity issue. Though defects possess greater free energies than aligned morphologies and are highly energetically unfavorable, they can be kinetically trapped by the energy barriers and persist for a long time during annealing. Therefore, understanding the kinetics of defect annihilation is crucial in revealing the mechanism of defect formation and in further reducing defectivity in DSA. We focus on two types of predominant defects in DSA—dislocation and bridge. A kinetic model of each defect type is developed through statistical analysis of experimental data, providing insight into possible approaches of further defect reduction. We also investigate the impact of annealing temperature and film thickness on annihilation kinetics and discuss the reasons behind the observed results. By simply optimizing annealing conditions and film thickness, we have successfully reduced the total defect density by 1 order of magnitude. Though these findings are based on polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA), we anticipate they could be readily applied to other BCP platforms as well.
PENGARUH KEMAMPUAN LABA DAN ARUS KAS OPERASI DALAM MEMPREDIKSI ARUS KAS OPERASI MASA DEPAN (Studi Empiris Pada Perusahaan Manufaktur yang Terdaftar di BEI)

Penelitian ini bertujuan untuk menguji pengaruh laba dan arus kas operasi dalam memprediksi arus kas operasi masa depan. Penelitian ini tergolong penelitian kausatif. Populasi penelitian ini adalah perusahaan manufaktur yang terdaftar di Bursa Efek Indonesia pada tahun 2010 sampai dengan tahun 2013. Sampel penelitian ini ditentukan dengan metode purposivesampling. Berdasarkan hasil analisis regresi berganda dengan tingkat signifikansi 0,05 maka hasil penelitian ini menyimpulkan: 1) Laba berpengaruh signifikan positif terhadap arus kas operasi masa depan, dimana nilai signifikansi 0,000 ttabel yaitu 14,782 > 1,968 dan β sebesar 0,504 (H1 diterima). 2) Arus kas operasi berpengaruh signifikan terhadap arus kas operasi masa depan, dimana nilai signifikansi 0,000 t table yaitu 9,743 > 1,968 (H2 diterima). 3) Laba memiliki kemampuan yang lebih baik dari pada arus kas operasi dalam memprediksi arus kas operasi masa depan, dimana laba memiliki nilai standardized coefficients beta lebih besar dari nilai arus kas operasi, yaitu 0,582 > 0,384 (H3 diterima).
Asymptotically Exact Approximations to Generalized Fading Sum Statistics

We propose a unified approach to approximate the probability density function and the cumulative distribution function of a sum of independent channel envelopes following generalized, and possibly mixed, fading models. In the proposed approach, the approximate sum distribution can be chosen out of a broad class of statistical models. More fundamentally, given any chosen model, the parameters of the approximate sum distribution are calibrated by matching its asymptotic behavior around zero to that of the exact sum. In a subsidiary fashion, one or more moments of the exact and approximate sums are also matched to one another if the approximate distribution has three or more parameters to be adjusted, respectively. As illustrated through many numerical examples, our approach outperforms existing ones that are solely based on moment matching, by yielding statistical approximations that are remarkably accurate at medium to high signal-to-noise ratio — a paramount operational regime for communications systems. Our results find applicability in several wireless applications where fading sums arise, and can be readily extended to accommodate sums of fading (power) gains and, in a broader context, generic sums of non-negative random variables.
Bifurcation analysis of the primary instability in the flow around a flexibly mounted circular cylinder

The nonlinear character of the primary bifurcation is investigated for the flow around a flexibly mounted circular cylinder. We have considered the cases in which the cylinder can oscillate in the transverse direction only and in both transverse and in-line directions. Low and high values of mass ratio ( $m^{\ast }=5$ and 50) were studied, and reduced velocity ( $V_{r}$ ) values are chosen inside ( $V_{r}=9$ ) and outside ( $V_{r}=5$ and $V_{r}=13$ ) the lock-in range for low Reynolds numbers. For each combination of $m^{\ast }$ and $V_{r}$ , a global linear stability analysis was applied to find the critical Reynolds number $Re_{c}$ of the fluid–structure system. For $V_{r}$ in the lock-in range, the values of $Re_{c}$ were noticeably less than the critical Reynolds number of the flow around a fixed circular cylinder ( $Re_{c_{0}}\cong 47$ ). On the other hand, for $V_{r}$ outside the lock-in range, the values of $Re_{c}$ were close to $Re_{c_{0}}$ . Next, nonlinear analyses were performed in the vicinity of $Re_{c}$ for each case. Subcritical character (with hysteresis) was observed for $V_{r}$ in the lock-in range, while for $V_{r}$ outside the lock-in region the bifurcations were found to be supercritical (without hysteresis). This shows that when the coupling between the structure and flow is strong, due to the proximity of the natural frequencies of the isolated systems, it significantly changes both the linear and nonlinear responses observed.
Os determinantes das condições de saúde dos idosos do município de São Paulo em uma perspectiva de ciclo de vida

Ao longo do seculo XX, a dinâmica demografica estabeleceu um processo de envelhecimento da populacao sem precedentes nos tempos modernos, com consequencias tanto do ponto de vista social quanto do individual. Assim, entender como as condicoes de saude estao associadas a tal processo e crucial. Portanto, o primeiro objetivo desta tese e propor um modelo de analise que permita uma visao geral de como as condicoes socioeconomicas e de saude evoluem e interagem ao longo da vida. O segundo objetivo e analisar as associacoes entre as condicoes socioeconomicas ao longo da vida dos idosos e tres diferentes enfoques de avaliacao da saude: presenca de doencas cronicas, limitacoes funcionais e auto-avaliacao de saude. Para tanto, foram utilizados os dados do projeto SABE para o municipio de Sao Paulo. Para testar os modelos foram utilizadas a Regressao de Poisson e a Regressao Logistica Ordenada.Os resultados revelam que a deterioracao das condicoes cognitivas, o consumo de remedios na fase adulta, o tabagismo e o sedentarismo sao determinantes comuns as tres diferentes dimensoes de saude estudadas. Nao obstante, os resultados mostraram que, a despeito dos determinantes comuns ha tambem os determinantes especificos de cada dimensao de saude e que estes se manifestam em todas as fases da vida. Em outras palavras, politicas preventivas focalizadas na reducao das desigualdades sociais e economicas na infância, na fase adulta e na fase idosa terao impactos diferentes dependendo da dimensao de saude analisada. Por exemplo, acoes preventivas como a imunizacao de doencas infecciosas na infância - dadas as associacoes encontradas - poderia promover a reducao de doencas cronico-degenerativas e incapacidades funcionais na fase idosa. Da mesma forma, investimentos em educacao e acesso a servicos de saude de qualidade poderiam contribuir para que os idosos tenham uma auto-avaliacao mais positiva da saude. Neste sentido o desenho conceitual proposto nesta tese traz uma especie de roteiro que auxilia a interpretacao dos resultados e permite uma maior clareza sobre como as condicoes ao longo da vida interagem e influenciam a saude do idoso em seus multiplos aspectos. Alem disso, o novo marco conceitual contribui para estrategias de analises e para a definicao de informacoes a serem coletadas em pesquisas futuras orientadas ao melhor entendimento dos determinantes do bem-estar do idoso.