Nano-size solidification microconstituents in electro-spark deposited Ni-base superalloy

The microstructure of electro-spark deposited IN 718 was investigated by analytical transmission electron microscopy. The analysis shows in contrast to general assumption, extreme rapid cooling rates involved in electro-spark deposition (ESD) did not produce partitionless solidification, devoid of second phase microconstituents in the material. Nanosized Laves and MC carbide particles were formed in the interdendritic regions of IN 718 electro-spark weld deposit, which indicate the occurrence of segregation-induced phase formation during solidification of the weld. The formation of Laves phase particles, which is known to be deleterious to the mechanical properties of IN 718, requires adequate consideration in the application of IN 718, and possibly other Nb-bearing nickel-base superalloys, processed by ESD.     

Experiencing malevolent voices is associated with attentional dysfunction in psychotic patients

Inattention in people with schizophrenia is common. However, there has been little research on the association between inattention and auditory hallucinations. The aim of the study was to investigate how inattention is affected by beliefs about voices as benevolent and malevolent and perceived control of voices. A total of 31 patients who experienced auditory hallucinations and who met the criteria for schizophrenia or other psychosis completed the attention subscale of the Scale for the Assessment of Negative Symptoms (SANS) and the Connors’ Continuous Performance Test II (CCPT‐II). The revised Beliefs About Voices Questionnaire (BAVQ‐R) was used to assess malevolent and benevolent beliefs about voices, and severity of auditory hallucinations (the Psychotic Symptom Rating Scales; PSYRATS) was used to assess perceived control of voices and frequency of voices. Levels of depression (the Beck Depression Inventory; BDI), anxiety (the Beck Anxiety Inventory; BAI), severity of overall psychiatric symptoms (the Brief Psychiatric Rating Scale; BPRS), and severity of negative symptoms (SANS) were assessed to control for their potential confounding effects. The relations between the variables were explored with correlations and multiple hierarchical regression analyses. The results indicated that more malevolent, but not more benevolent, beliefs about voices predicted lower levels of attention, independently of general psychiatric symptoms and various other psychotic symptoms such as frequency of and perceived control of voices. These findings suggest an important relationship between malevolent beliefs about voices and levels of inattention. The possible impact of changing beliefs about voices to improve attentional functioning is discussed.     

Influence of Profession as Risk of STIs in Intimate Partner Relationship in South Asian Countries

Mixing of sexual partners as part of the profession of female sex workers (FSWs) can be a risk in intimate partner relationship, which is primarily based on love and affection. Sexual relation with one partner provides emotional and psychological support. However, when it is a web of partners, it often results in unprotected sex, consequently creating a pathway for disease and increasing the vulnerability of FSWs to sexually transmitted infections (STIs). This paper analyses the subtleties of sexual behavior of FSWs and their vulnerability toward STIs in intimate partner relationship in South Asian countries. The basic data used in this paper have been taken from 3 countries, 1271 FSWs from Bangladesh, 1404 FSWs from Nepal, and 7399 FSWs from India. The data were collected through modified time location cluster sampling as a part of mapping and size estimation of most-at-risk populations (MARPs) in Nepal and key affected populations (KAPs) in Bangladesh during the period of 2010–2016. The data for India are taken from the integrated behavioral and biological assessment (IBBA), which assesses the prevalence of high risk population in India. The findings reveal that the majority of the FSWs were married, which reveals dynamics of sexual activity placing them at higher risk of STIs. About half of the FSWs had more than 15 coituses in the last 30 days in Nepal, which is a high risk factor. Unprotected sex is reported high across all three countries irrespective of all background characteristics. Condom use during intercourse in Bangladesh is less likely in older FSWs and more likely among educated FSWs who had coital frequency of 7 or more in the last 30 days. Interestingly, unmarried FSWs in Nepal are less likely to use condom in their last sex as against India where FSWs are more likely to use condom in their last sex. The prevalence of STI among uneducated FSWs is found higher in Bangladesh as compared to Nepal and India. The socio-demographic background characteristics showed a significant association with unprotected sex, coital frequency and prevalence of STI across all three countries.