Phase quantized quasi-Sierpinski carpet reflector for OAM beam generation

This work proposes a quasi-Sierpinski carpet type reflecting surface. The reflector incorporates remodeled Jerusalem type sub-wavelength elements. The element arrangement ensures a 3-bit phase quantized encoding for the reflected beam. Microstrip antenna feed illuminates this reflector. We start with EM simulation of a broadband unit-cell reflector. We assume that the final reflector based on such unit-cell shall show broadband characteristic. The simulated beam from the reflector, due to spatial arrangements of the unit-cells, showed the fundamental mode of orbital angular momentum vortex beams. Experimental verification of fabricated prototype shows good agreement with simulated far-field results at 9.5 GHz, 10 GHz, 10.5 GHz, and 11 GHz which indicate a broadband characteristic

A Machine Learning Approach to Decipher the Origin of Magnetic Anisotropy in Three-Coordinate Cobalt Single-Ion Magnets

Single Molecule Magnets (SMMs) emulate permanent magnets and are highly regarded for their role in compact information storage and molecular spintronics. Their behavior is primarily governed by magnetic anisotropy, expressed through parameters like the axial zero-field splitting (D) and orientation of magnetic anisotropy (gx, gy, gz) in mononuclear transition metal complexes. Low-coordinate mononuclear transition metal complexes stand out for their substantial anisotropy and higher blocking temperatures. However, understanding the intricate interplay between these parameters poses a significant challenge, often beyond traditional magneto-structural correlations. Hence, machine learning (ML) tools have been embraced to address these complexities. By employing an ML model based on Co-ligand bond length and angle relative to the pseudo-C3 axis, this study effectively rationalizes variations in D values, g-factors, and rhombic anisotropy, crucial for determining magnetic properties. Leveraging a dataset of 627 molecules, the research explores ML\u27s potential in predicting magnetic anisotropy parameters in three-coordinate Co(II) complexes, achieving a minimal mean absolute error (MAE) of approximately 17 cm⁻¹ and high accuracy levels exceeding 95% for classification tasks. These insights offer valuable guidance for the development of innovative single-ion magnets

An adolescent with bestiality behaviour: Psychological evaluation and community health concerns

Bestiality is a serious but less commonly reported form of animal cruelty occurring in a society. It is a punishable sexual offence in India. Bestiality has received little attention in recent psychiatric literature, and even though case reports have been published, an elaborate psychological assessment is often missing. This case report of 18 year old male presented here highlighted the importance of psychological assessment to emphasize on its implications for the further risk assessment of the person, family psycho-education and non-pharmacological intervention for bestialists. The overall assessment suggested of absence of any brain dysfunction and active psychopathology, average intelligence (IQ) and intact cognitive functioning. The findings portrayed physical and sexual inadequacies, emotional and sexual immaturity, difficulty in emotional attachment, internalized hostility, voyeuristic tendencies and infantile social behaviour, excitement seeker, inability to delay gratification of impulses, lacks empathy, poor self-discipline, less conscientiousness and less sensitive to criticism. The report also emphasized the role of child sexual abuse on sexual behavior later life. The importance of including the topic within the community health/sexual and reproductive health education programmes was highlighted

Suicide in a patient of rectal carcinoma: Exploration of psychodynamics from the suicide note

Distress related with cancer not only impairs the quality of life and accelerates disease progression, but also causes noncancer mortality including suicide. The physical and psychological sufferings in a cancer patient are the major causes of suicide. Financial burden related to the expensive treatment of cancer further add up to the suffering of the patients as well as their family. We reported a case of rectal carcinoma, who committed suicide inside the hospital premises leaving behind a suicide note. Patient's clinical history, sociodemographic profile, and the suicide note were analyzed. The content analysis of the suicide note has been described along with an analysis of different factors associated with suicide in cancer patients in an Indian scenario. Suicide note may show the reflections of psychodynamics of suicide, hence, it needs to be included routinely during psychiatric evaluation