Twist Angle-Dependent Phonon Hybridization in WSe2/WSe2 Homobilayer.

The emerging moiré superstructure of twisted transition metal dichalcogenides (TMDs) leads to various correlated electronic and optical properties compared to those of twisted bilayer graphene. In such a versatile architecture, phonons can also be renormalized and evolve due to atomic reconstruction, which, in turn, depends on the twist angle. However, observing this reconstruction and its relationship to phonon behavior with conventional, cost-effective imaging methods remains challenging. Here, we used noninvasive Raman spectroscopy on twisted WSe2/WSe2 (t-WSe2) homobilayers to examine the evolution of phonon modes due to interlayer coupling and atomic reconstruction. Unlike in the natural bilayer (NB), ∼0° as well as ∼60° t-WSe2 samples, the nearly degenerate A1g/E2g mode in the twisted samples (1-7°) split into a doublet in addition to the nondegenerate B2g mode, and the maximum splitting is observed around 2-3°. Our detailed theoretical calculations qualitatively capture the splitting and its dependence as a function of the twist angle and highlight the role of the moiré potential in phonon hybridization. Additionally, we found that around the 2° twist angle, the anharmonic phonon-phonon interaction is higher than the natural bilayer and decreases for larger twist angles. Interestingly, we observed anomalous Raman frequency softening and line-width increase with the decreasing temperature below 50 K, pointing to the combined effect of enhanced electron-phonon coupling and cubic anharmonic interactions in moiré superlattice.

Experiences of the family caregivers of persons with schizophrenia in north Indian region: A qualitative inquiry.

INTRODUCTION: Family caregivers with schizophrenia struggle with psychological, social, and other challenges due to stigma, lack of adequate information, and maladaptive coping strategies. We aimed to explore the experiences of caregivers of persons with schizophrenia (PwS) to comprehend the emotional challenges and other burdens and coping strategies utilized. METHODS: We subscribed to a phenomenological approach and interviewed nine caregivers in-depth. Audio-recorded interviews were transcribed and translated from Hindi to English. Thematic analysis was performed using the seven-step Colaizzi's method. ATLAS.ti.22 was used for the analysis of the data. RESULTS: Five themes emerged from the data: 1) general understanding of schizophrenia, 2) emotional burden, 3) Disruption in personal and socio-occupational life, 4) challenges in caregiving, and 5) coping strategies. Caregiving adversely affected the quality of life socially and financially. Schizophrenia stigmatized families, trapped them in their homes, and left them no choice but to get support from informal networks. Also, caregivers experienced a lack of healthcare facilities in the vicinity and reported a substandard level of formal care. CONCLUSION: Giving care to PwS entails financial, social, emotional, and physical burden. Feelings of frustration, helplessness, uncertainty, and loss are common. Transformation of personal, professional, and social life are usual consequence of caregiving. Generally, caregivers cope through addictions or spiritual means. Significant perceived requirements include a lack of knowledge about the condition and how to manage it as well as inadequate support services. Emotional and financial support and community support services near home may ease the burden of caregiving for PwS.

Electrical noise spectroscopy of magnons in a quantum Hall ferromagnet.

Collective spin-wave excitations, magnons, are promising quasi-particles for next-generation spintronics devices, including platforms for information transfer. In a quantum Hall ferromagnets, detection of these charge-neutral excitations relies on the conversion of magnons into electrical signals in the form of excess electrons and holes, but if the excess electron and holes are equal, detecting an electrical signal is challenging. In this work, we overcome this shortcoming by measuring the electrical noise generated by magnons. We use the symmetry-broken quantum Hall ferromagnet of the zeroth Landau level in graphene to launch magnons. Absorption of these magnons creates excess noise above the Zeeman energy and remains finite even when the average electrical signal is zero. Moreover, we formulate a theoretical model in which the noise is produced by equilibration between edge channels and propagating magnons. Our model also allows us to pinpoint the regime of ballistic magnon transport in our device.

Anxiety, Depression, and Quality of Life Among Infertile Women: A Case-Control Study.

Introduction Pregnancy holds significant cultural and social value for women. However, women facing challenges in conceiving often grapple with emotional distress, including depression and anxiety. The connection between psychological elements (stress, anxiety, and depression) and infertility is complex, influenced by multiple factors, and bidirectional. Infertile women are more likely to develop mental illnesses, marital dissatisfaction, and impaired quality of life compared to the individuals of the fertile group. Thus, the study aimed to assess levels of anxiety, depression, and quality of life among infertile women compared to fertile women. Methods This case-control study conducted at a tertiary care center recruited 100 nulliparous women between the age group of 20 and 38 years with primary or secondary infertility, while those with male factor infertility were excluded. The control group (N=100) comprised normal parous women who had at least one child. The primary objective of the study was to assess the impact of infertility on the mental health and quality of life of women seeking infertility treatment. Outcome measures included standardized tools such as the WHOQOL-BREF questionnaire to assess the quality of life across multiple domains (e.g., physical, psychological, social, and environmental) as well as the Depression Anxiety and Stress Scale (DASS-21) to measure levels of anxiety, depression, and stress. Cronbach's alpha was used to measure the tool's reliability. A P value of <0.05 was considered statistically significant. Results Baseline sociodemographic parameters were comparable between the two groups. The mean age of infertile women was 30.6±3.9 years compared to 31.5±3.2 years in fertile women (P=0.076). Using the WHOQOL-BREF scale, we found that the quality of life was better in the fertile group compared to the infertile group through all the physical, psychological, social, and environmental domains (P<0.001). The infertile group had a significantly higher number of women with anxiety, depression, and stress. The questionnaires showed high internal reliability. Conclusion Infertile women experienced a lower quality of life in various domains, higher levels of anxiety, and increased rates of depression compared to fertile counterparts. The study findings underscore the multidimensional impact of infertility, emphasizing the need for comprehensive healthcare approaches to address the psychosocial challenges faced by women undergoing infertility treatment.

Electric-Field-Tunable Edge Transport in Bernal-Stacked Trilayer Graphene.

This Letter presents a nonlocal study on the electric-field-tunable edge transport in h-BN-encapsulated dual-gated Bernal-stacked (ABA) trilayer graphene across various displacement fields (D) and temperatures (T). Our measurements revealed that the nonlocal resistance (R_{NL}) surpassed the expected classical Ohmic contribution by a factor of at least 2 orders of magnitude. Through scaling analysis, we found that the nonlocal resistance scales linearly with the local resistance (R_{L}) only when the D exceeds a critical value of ∼0.2 V/nm. Additionally, we observed that the scaling exponent remains constant at unity for temperatures below the bulk-band gap energy threshold (T<25 K). Further, the value of R_{NL} decreases in a linear fashion as the channel length (L) increases. These experimental findings provide evidence for edge-mediated charge transport in ABA trilayer graphene under the influence of a finite displacement field. Furthermore, our theoretical calculations support these results by demonstrating the emergence of dispersive edge modes within the bulk-band gap energy range when a sufficient displacement field is applied.

Research on psychotherapy in India: A systematic review.

We systematically reviewed empirical studies of psychotherapy with Indian clients. We defined psychotherapy as an intervention aimed at treating mental disorders using "talk," which, in a professional medical setting, along with the therapeutic relationship, acquires medicinal value. Besides manual searches in three leading Indian psychiatry journals, we conducted digital searches in PubMed, Google Scholar, and Scopus databases. We found that the commonly practiced evidence-based psychotherapy in India follows the cognitive-behavioral model. Our findings suggest several replication studies which claimed to have used the well-established western models of cognitive behavioural paradigm but have mostly focused on basic behavioural techniques in their protocol. A few innovations were observed, and several essential errors were noted. Innovations include contextual modifications to address the difficulties and challenges faced in service delivery, while errors include deviations from protocol without adequate rationale.

Modification and Validation of a Diagnostic Questionnaire for Restless Legs Syndrome: Modified-Restless Legs Syndrome Diagnostic Questionnaire (m-RLS-DQ).

Background: Diagnostic questionnaire that are available for restless legs syndrome does not include items related to RLS mimics and, hence, increases chances of false positive cases. This study aimed at modification and validation of RLS-diagnostic Questionnaire. Methods: During modification, additional items were identified, developed, and subjected to evaluation by experts. Experts were requested to validate the content of each item. Based on their responses, content validity indices (average and universal agreement) were calculated. It was then translated to Hindi and validated in a clinical population that included patients with RLS, somatic symptoms disorder, anxiety, other RLS mimics, and osteoarthritis. In addition, a group of healthy controls was also included. Face, concurrent, and discriminant validities were calculated. Results: Among 209 subjects, nearly 40 subjects had clinical diagnosis of RLS, osteoarthritis, somatic-symptoms-disorder, and anxiety disorder, each. In addition, 16 patients had other RLS mimics (akathisia, varicose veins, BFS, leg-cramps, chronic insomnia) and 30 were healthy controls. After multiple revisions, content validity indices achieved a score of 1 for m-RLS-DQ. Sensitivity and specificity of m-RLS-DQ v. 1.4 for the diagnosis of RLS were 94.9% and 94.1%, respectively. For the diagnosis of RLS, PPV was 78.7%, and NPV was 98.7% with an accuracy of 94.3%. Less than one fourth of participants having chronic insomnia, somatic symptoms disorder, anxiety disorder, and knee osteoarthritis were found to be false positive on m-RLS-DQ; however, none of the healthy controls were found positive on m-RLS-DQ. Concurrent validity with clinical diagnosis of RLS was 0.83 (P < 0.001). Discriminant validity with somatic symptoms disorder was -0.14 (P = 0.03) and with osteoarthritis -0.24 (P < 0.001). Conclusion: m-RLS-DQ is a valid instrument with acceptable psychometric properties, which can be used for the screening as well as diagnosis of RLS in clinical practice and research studies.

Exploring Coping and Religiosity in an Indian Ashram for Older Adults.

BACKGROUND AND OBJECTIVES: With the aging of Indians and the cultural context of family care, faith-based ashrams are a possible middle way for older adult care for strained families. Religiosity is multidimensional, but it is unclear how its different dimensions relate to coping. This exploratory study investigates the profile of residents living in a faith-based ashram of Haridwar, a pilgrimage town in Northern India. Additionally, it examines religiosity and coping in this population, and the correlates of positive coping response (PCR). METHODOLOGY: Preliminary field survey helped zero in on a single consenting ashram. We included 95 older adult participants (≥ 60 years) residing for more than six months. Relevant dimensions were captured with a survey interview form to record sociodemographics, BriefCOPE, and Duke University Religion Index. The sample was representative of the institutionalized older-adult population considering the overlap of sociodemographics (age, gender, and marital status). We conducted linear regression to examine possible predictors of PCR. RESULTS: Most older adults were Hindus, higher educated, married, and lived with their spouses. The participants were highly religious. Coping through religion was most common, followed by active coping. On linear regression, a significant model emerged [F (13, 63) = 3.411, p < .001), where age, education, and organizational religious activity were significant predictors of PCR. However, other sociodemographic (sex, marital status, economics, family contact) and dimensions of religiosity (non-organizational religious activity and intrinsic religiosity) variables failed to predict PCR. CONCLUSION: Lesser age, higher education, and involvement in the public practice of religiosity are essential contributors to PCR in older adults. How different aspects of religiosity influence coping and lend meaning to dealing with stress, needs further exploration.

Use of Therapeutic Milieu Interventions in a Psychiatric Setting: A Systematic Review.

BACKGROUND: The therapeutic environment is commonly acknowledged as a significant influence on mental inpatient treatment experiences and outcomes. Therapeutic milieu interventions provide a distinct, secure hospital ward/unit atmosphere where patients with mental illness receive therapeutic interactions and collaborative attentiveness. The review aimed to explore the studies related to the role of a nurse using therapeutic milieu/milieu therapy in a psychiatric setting. MATERIALS AND METHODS: A systematic literature search was conducted between 1976 and 2021 using PsycINFO, Medline, Embase, and Scopus. A total of 13 papers were identified for a full review. RESULTS: A total of 70 studies were found, out of which 13 of them were analyzed. These studies looked at several therapeutic milieu concepts, such as therapeutic communication, patient satisfaction, nurse involvement, ward design and structure, and a mixture of therapeutic milieu concepts. Most of the studies explored the concepts of milieu therapy in community settings. CONCLUSION: In the mental health nursing literature, the milieu, as well as milieu therapy, is a well-debated subject. Though the importance of therapeutic milieu in psychiatric settings is recognized, empirical studies on milieu implementation are scarce. Therefore, research is needed to explore the effectiveness of milieu therapy in inpatient psychiatric care, which facilitates patient recovery, safety, and good interpersonal relationships.

Frequency of suicide ideation and attempts and its correlates among inpatients with depressive disorders at a tertiary care center in North India.

Background: Suicidal ideation is higher in psychiatric patients, particularly in those with depressive disorders. It tends to be a precursor to suicide attempts. Aim: To estimate the frequency of suicide ideation and attempts and their sociodemographic and clinical correlations among the inpatients with depressive disorders at a tertiary care center in North India. Methods: A cross-sectional descriptive survey was carried out among 128 participants diagnosed with depressive disorders who were admitted from September 2019 to April 2021 at a tertiary care hospital, India, using a total enumerative sampling technique. The sociodemographic and clinical data (particularly on suicide) were supplemented with the Modified Scale of Suicide Ideation (to evaluate suicidality) and the Hamilton Depression Rating Scale (for the severity of depression). Results: The median suicide ideation score was 11 inter quartile range (IQR: 19), and the overall mean depression score of the sample was 22.74 standard deviation (SD = 6.24). About 87% reported moderate to severe suicidal ideas. Occupation (farmer) (P < 0.01), current medications (tricyclic antidepressant) (P < 0.05), and history of suicide (P < 0.05) were significantly associated with the severity of depression. However, only a history of suicide was significantly associated with the current suicidal ideation (P < 0.05). About 48% had a history of suicide attempts, and among those who were more severely depressed, intoxicated during a suicide attempt (P < 0.01), taken precautions against being interrupted (P < 0.05), and had an intention to die (P < 0.05) had a significant association with their suicide attempts. Conclusion: Among hospitalized patients with depressive disorders, suicidal ideation is common. The study reiterates the importance of screening for suicide, particularly in those with more severe depression in the inpatient setting.

Determination of topological edge quantum numbers of fractional quantum Hall phases by thermal conductance measurements.

To determine the topological quantum numbers of fractional quantum Hall (FQH) states hosting counter-propagating (CP) downstream (Nd) and upstream (Nu) edge modes, it is pivotal to study quantized transport both in the presence and absence of edge mode equilibration. While reaching the non-equilibrated regime is challenging for charge transport, we target here the thermal Hall conductance GQ, which is purely governed by edge quantum numbers Nd and Nu. Our experimental setup is realized with a hexagonal boron nitride (hBN) encapsulated graphite gated single layer graphene device. For temperatures up to 35 mK, our measured GQ at ν = 2/3 and 3/5 (with CP modes) match the quantized values of non-equilibrated regime (Nd + Nu)κ0T, where κ0T is a quanta of GQ. With increasing temperature, GQ decreases and eventually takes the value of the equilibrated regime ∣Nd - Nu∣κ0T. By contrast, at ν = 1/3 and 2/5 (without CP modes), GQ remains robustly quantized at Ndκ0T independent of the temperature. Thus, measuring the quantized values of GQ in two regimes, we determine the edge quantum numbers, which opens a new route for finding the topological order of exotic non-Abelian FQH states.

Tunable lattice thermal conductivity of twisted bilayer MoS2.

We have studied the thermal conductivity (κ) of layered MoS2, a typical member of the transition metal dichalcogenide (TMDC) materials, using fully atomistic molecular dynamics simulations and Boltzmann transport equation (BTE) based first principles methods. We investigate the tuning of the thermal conductivity with the twist angle between two layers and found a decreasing trend of κ with the increase in the lattice constant of the moiré superlattice. The thermal conductivity at twist angle θ = 21.78° is found to be 72.03 W m-1 K-1 and for an angle of 2.87°, it reaches 54.48 W m-1 K-1, leading to a 32% reduction in the thermal conductivity. We use first principles calculations based on the BTE for phonons to give a microscopic origin of the decrease in thermal conductivity through anharmonic phonon scattering events and also reaffirm the MD simulation results for the monolayer and bilayer.

Observation of ballistic upstream modes at fractional quantum Hall edges of graphene.

The presence of "upstream" modes, moving against the direction of charge current flow in the fractional quantum Hall (FQH) phases, is critical for the emergence of renormalized modes with exotic quantum statistics. Detection of excess noise at the edge is a smoking gun for the presence of upstream modes. Here, we report noise measurements at the edges of FQH states realized in dual graphite-gated bilayer graphene devices. A noiseless dc current is injected at one of the edge contacts, and the noise generated at contacts at length, L = 4 µm and 10 µm away along the upstream direction is studied. For integer and particle-like FQH states, no detectable noise is measured. By contrast, for "hole-conjugate" FQH states, we detect a strong noise proportional to the injected current, unambiguously proving the existence of upstream modes. The noise magnitude remains independent of length, which matches our theoretical analysis demonstrating the ballistic nature of upstream energy transport, quite distinct from the diffusive propagation reported earlier in GaAs-based systems.

Influence on attitudes and lifestyle due to lockdown amidst COVID-19 pandemic: a perception-based analysis among Bangladeshi residents.

BACKGROUND: Countrywide lockdown or stay-at-home order has been implemented to slow down the transmission of emergent coronavirus. However, the influence on attitudes and lifestyle due to lockdown amidst the coronavirus disease 2019 (COVID-19) pandemic has been poorly understood. The present study aimed to investigate the influence on attitudes and lifestyle due to lockdown amidst the COVID-19 pandemic among Bangladeshi residents. METHODS: A cross-sectional survey carried out involving 1635 community dwellers across eight divisions in Bangladesh conducted from April 15, 2020 to May 10, 2020. A structured questionnaire incorporating socio-demographic, attitudes towards lockdown and adverse lifestyle amidst lockdown measures was employed to collect data using the Google Forms. Multiple regression analyses were executed to determine the associated factors of positive attitudes towards lockdown and adverse lifestyle. RESULTS: The mean scores of attitudes towards lockdown were 67.9 (SD = 8.4) out of 85 with an overall correct rate (positive attitudes) of 79.9%; whereas the mean scores of adverse lifestyle amidst lockdown were 16.1 (SD = 4.8) out of 34 with an overall rate of 47.4%. The factors associated with more positive attitudes towards lockdown included being female, divorced, higher educated, and students. Conversely, being male, having no formal education, and rural residence were associated factors of adverse lifestyle amidst the COVID-19 pandemic. CONCLUSIONS: The findings reflect how the COVID-19 lockdown has preciously impacted the attitudes, and lifestyle of Bangladeshi citizens, which will contribute to promoting appropriate measures during a subsequent zonal or complete lockdown.

Tightly linked Rps12 and Rps13 genes provide broad-spectrum Phytophthora resistance in soybean.

The Phytophtora root and stem rot is a serious disease in soybean. It is caused by the oomycete pathogen Phytophthora sojae. Growing Phytophthora resistant cultivars is the major method of controlling this disease. Resistance is race- or gene-specific; a single gene confers immunity against only a subset of the P. sojae isolates. Unfortunately, rapid evolution of new Phytophthora sojae virulent pathotypes limits the effectiveness of an Rps ("resistance to Phytophthora sojae") gene to 8-15 years. The current study was designed to investigate the effectiveness of Rps12 against a set of P. sojae isolates using recombinant inbred lines (RILs) that contain recombination break points in the Rps12 region. Our study revealed a unique Rps gene linked to the Rps12 locus. We named this novel gene as Rps13 that confers resistance against P. sojae isolate V13, which is virulent to recombinants that contains Rps12 but lack Rps13. The genetic distance between the two Rps genes is 4 cM. Our study revealed that two tightly linked functional Rps genes with distinct race-specificity provide broad-spectrum resistance in soybean. We report here the molecular markers for incorporating the broad-spectrum Phytophthora resistance conferred by the two Rps genes in commercial soybean cultivars.