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Introduction: COVID-19 outbreak has caused changes around the world with many polices remade to stop the spread of this virus since it started in 2019. Indonesia with the overall highest positive cases in South-East Asia has been challenged with prolonged restriction policy issued from early 2020 until now due to continuous increase of cases. This study aims to know the mental health of Indonesia citizens during early quarantine before it changed into restriction. Method: Indonesian version DASS-21 questionnaire was used in this cross-sectional study to assess Indonesian adults aged > 25 years old using an online platform from 22nd April, 2020 to 28th May, 2020, then analyzed using T-test and one-way ANOVA. Result: All participants have no depression and stress symptoms that meet the threshold for probable depression according to the DASS-21 instrument. On the other hand, 26.3% participants showed anxiety symptom with severity classified into mild (16.0%), moderate (8.9%), and severe (0.4%). Conclusion: This study also found relationship of depression, anxiety, and stress characteristic with gender, age marital status, and income in adults during pandemic. Where in this study shows male, younger age, unmarried status, and lower income people have higher scale of depression, anxiety, and stress characteristic. This finding may help Indonesia’s government and citizens to assess the restriction to mental health of Indonesian adults for further effective policy implementation.

We exhibit presentations of the Von Dyck groups $D(2, 3, m), \ m\ge 3$, in terms of two generators of order $m$ satisfying three relations, one of which is Artin's braid relation. By dropping the relation which fixes the order of the generators we obtain the universal covering groups of the corresponding Von Dyck groups. In the cases $m=3, 4, 5$, these are respectively the double covers of the finite rotational tetrahedral, octahedral and icosahedral groups. When $m\ge 6$ we obtain infinite covers of the corresponding infinite Von Dyck groups. The interesting cases arise for $m\ge 7$ when these groups act as discrete groups of isometries of the hyperbolic plane. Imposing a suitable third relation we obtain three-relator presentations of $\text{PSL}(2,m)$. We discover two general formulas presenting these as factors of $D(2, 3, m)$. The first one works for any odd $m$ and is essentially equivalent to the shortest known presentation of Sunday [J. Sunday, Presentations of the groups ${\rm SL}(2,\,m)$ and ${\rm PSL}(2,\,m)$, Canadian J. Math., 24 (1972) 1129--1131]. The second applies to the cases $m\equiv\pm 2\ (\text{mod}\ 3)$, $m\equiv \hskip -9pt/ \ 11(\text{mod}\ 30)$, and is substantively shorter. Additionally, by random search, we find many efficient presentations of finite simple Chevalley groups PSL($2,q$) as factors of $D(2, 3, m)$ where $m$ divides the order of the group. The only other simple group that we found in this way is the sporadic Janko group $J_2$.

This paper aims to establish conditions that guarantee the existence and uniqueness of a common fixed point for a pair of functions defined on a metric space, satisfying a type of contractive inequality involving distance-altering functions. We use some weaker forms of commuting maps to achieve our results, concretely, occasionally weakly compatible maps. We prove that if 𝑓,𝑔:(𝑋,𝑑)⟶(𝑋,𝑑)are occasionally weakly compatible maps with a coincident point such that𝜓(𝑑(𝑔(𝑥),𝑔(𝑦)))≤𝛼(𝑑(𝑓(𝑥),𝑓(𝑦)))∙𝜓(𝑑(𝑓(𝑥),𝑓(𝑦))),∀𝑥,𝑦∈𝑋where 𝛼:ℝ+⟶[0,1)and 𝜓is an altering distance function, then 𝑓and 𝑔have a unique common fixed point. This result generalizes some theorems of common fixed points where neither the continuity of maps nor the completeness of the metricspace is required.

This study empirically examines the impact of intellectual capital on banks financial performance in 57 public listed banks from Indonesia, Malaysia, and Thailand over the period of 2019 to 2020. Intellectual capital is measured by Pulic’s Value Added Intellectual Coefficient (VAICTM), while banking performance is measured according to CAMELS analysis method. Through the method of partial least squares analysis to find the path coefficients value of each variable, the results obtained show that there is a significant positive impact of VAICTM on management quality (NPM) and earnings (ROA) in Indonesian, Malaysian, and Thai Banks, and significant negative impact of VAICTM on asset management (NPL) of Indonesian, Malaysian, and Thai Banks. On the other side, VAICTM is considered to have an insignificant impact on the capital adequacy (CAR), liquidity (LDR), and sensitivity to market risk (IER) of the in Indonesian, Malaysian, and Thai Banks in 2019-2020.

The reliability of data of the () and () reactions on Cr obtained in experiment on the beam of bremsstrahlung using the corrections to the neutron yield cross section calculated via statistical theory was investigated. Using the experimental-theoretical method for evaluating photoneutron partial reaction cross sections based on objective physical criteria, it was shown that partial reaction cross sections obtained do not satisfy physical criteria of reliability. Experimental cross section of the Cr() Cr reaction is unreliably significantly underestimated, but that of the Cr() Cr reaction, on the contrary, is overestimated in comparison with evaluated ones. It is shown that it is the results of the shortcomings of the method for obtaining information about cross sections of partial reactions. The main reason is the disregard of the contribution of two-nucleon reaction () main features (energy position and amplitude) of whose cross section compete with those of also two-nucleon reaction (), though multiplicities of neutrons from those reactions are different. [ABSTRACT FROM AUTHOR]

Background: COVID-19 is an unprecedented public health event. It started from Wuhan, China, in late December of 2019 and later spread worldwide. During the pandemic, negative impacts on mental health were found in all groups, including adults of their productive age. Objective: This study aimed to search for factors related to Post Traumatic Stress Symptoms (PTSS) during the quarantine due to the COVID-19 pandemic in Indonesia, specifically about the demographic background of respondents and its relation to PTSS. Methods: This study employed a cross-sectional design involving 257 Indonesian adults aged 26-67 years from 26 out of 34 provinces in Indonesia. The questionnaire used in this study consists of demographic questions and an Indonesian version of the Impact of Event Scale-Revised (IESR). The questionnaire was distributed through a link attached to the social media platform from 17 September to 5 October 2020. Data were analyzed using t-test, one-way ANOVA, and multiple linear regression using SPSS 25.0. Results: The data analysis showed a significant relationship between age and mean IES-R score during quarantine time in Indonesia (p-value 0.001). Other demographic factors such as gender, education level, marital status, work from home, income during the pandemic, and pandemic effects to income showed no significant relation to the IES-R score of the respondents. Adults aged 25-44 years old tend to have higher IES-R scores than those aged 45-64 and 65+ years old. Conclusion: Age was related to the IES-R score, while the other five independent variables included in the linear regression analysis were found to be confounders in this study.

Non-human primate neuroimaging is a rapidly growing area of research that promises to transform and scale translational and cross-species comparative neuroscience. Unfortunately, the technological and methodological advances of the past two decades have outpaced the accrual of data, which is particularly challenging given the relatively few centers that have the necessary facilities and capabilities. The PRIMatE Data Exchange (PRIME-DE) addresses this challenge by aggregating independently acquired non-human primate magnetic resonance imaging (MRI) datasets and openly sharing them via the International Neuroimaging Data-sharing Initiative (INDI). Here, we present the rationale, design, and procedures for the PRIME-DE consortium, as well as the initial release, consisting of 25 independent data collections aggregated across 22 sites (total = 217 non-human primates). We also outline the unique pitfalls and challenges that should be considered in the analysis of non-human primate MRI datasets, including providing automated quality assessment of the contributed datasets.