Short-term performance variations of different photovoltaic system technologies under the humid subtropical climate of Kanpur in India

The study discusses the short-term performance variations of grid-connected photovoltaic (PV) systems installed in Kanpur, India. The analysis presents a holistic view of the performance variations of three PV array technologies [multi-crystalline (multi-Si), copper indium gallium diselenide and amorphous silicon] and two inverter types (high-frequency transformer and low-frequency transformer). The analysis considers the DC–AC conversion efficiency of the inverter, system performance through performance ratio (PR) calculations, energy variations between fixed and tracking systems and the comparison between calculated and simulated data for the examined period. The energy output difference between the tracking and fixed systems of the same PV technology show that these are dependent on differences in temperature coefficient, shading and other system related issues. The PR analysis shows the effect of temperature on the multi-Si system. The difference between the simulated and measured values of the systems was mostly attributed to the irradiance differences. Regarding the inverter evaluation, the results showed that both inverter types underperformed in terms of the conversion efficiency compared with nameplate values

Coral reef fish abundance and diversity of seagrass beds in Kavaratti atoll, Lakshadweep, India

The community organization of coral reef fishes in the seagrass sub-habitat of Kavaratti toll, Lakshadweep, India was studied during the period from January 1991 to June 1992. Twenty-seven families represented by 65 species were recorded by the visual censes method. The community diversity for families and species was 2.49 and 3.14 respectively. Juveniles and sub-adults of the most adult reef fish, which inhabit other sub-habitats, were recorded here. The high species diversity in the seagrass beds is due to their roles as nurseries, shelter and foraging grounds for many species. Labridae, Chaetodontidae, Acanthuridae and Mullidae were the most speciose families. Ocurrence of siganids was highly seasonal. The cover that seagrass canopy provides conceals many species and perhaps influenced counts. The occurrence of balistids could be related to the presence of interstitial and patches and abundant invertebrate food. Scorpaenids subsisted on abundant invertebrates and juveniles fishes. High counts and pronounced variations make seagrass beds unstable habitats. However, monsoon assemblages were relatively stable perhaps due to lack of excessive new recruits and a habitat shift by most species

Outcomes of Open Subacromial Decompression after Failed Arthroscopic Acromioplasty

Aim. To prospectively assess the effectiveness of revision with open subacromial decompression in patients who had a previous unsatisfactory outcome with the arthroscopic procedure. Methods. 11 patients were identified for the study, who did not demonstrate expected improvement in symptoms after arthroscopic acromioplasty. All patients underwent structured rehabilitation. Functional evaluation was conducted using the Hospital for Special Surgery, New York, shoulder rating questionnaire. Results. M : F was 7 : 4. The mean age was 57 years. The average shoulder score improved from 49.6 preoperatively to 56 postoperatively at an average followup of 16 months. Two patients showed deterioration in their shoulder scores after revision while the rest showed only marginal improvement. All except one patient stated that they would opt for surgery again if given a second chance. Conclusion. In the group of patients that fail to benefit from the arthroscopic decompression, only a marginal improvement was noted after revision with open decompression

Closed atraumatic flexor hallucis longus tendon rupture following hallux valgus correction repaired using a turn down flap

A case report of closed atraumatic rupture of flexor hallucis longus (FHL) tendon few months after hallux valgus correction in a high functioning individual is presented. There have been only two cases of FHL tendon rupture reported following hallux valgus correction in literature till now. Our patient underwent Hallux valgus corrective osteotomy, 4 months after which he presented with rupture of the FHL tendon, he subsequently underwent successful surgical turn down flap repair with good clinical outcome. Closed atraumatic rupture of FHL tendon as an isolated injury is a rare event evidenced by systematic review reporting only 10 cases in literature till now. Low clinical suspicion of FHL rupture in closed foot injuries could be one factor resulting in fewer cases being reported in literature. Acute rupture of FHL tendon following open foot injuries and partial closed rupture due to tendinitis in dancers have been reported frequently in literature. In conclusion, we emphasize careful handling of FHL tendon while performing corrective osteotomy of the hallux in any patient. Although, turn down flap is a well-documented technique to bridge gaps and repair chronic tendo-achilles rupture, we were able to replicate the same technique in our patient and produce good functional result using this effective tendon repair technique to bridge segmental gap as evidence by return of almost normal power of great toe plantar flexion

Age Related Incidence and Early Outcomes of Hip Fractures: A Prospective Cohort Study of 1177 patients

<p>Abstract</p> <p>Introduction</p> <p>Associated with the increase in the aging population, there is an increase in the incidence of hip fractures worldwide. Outcome following such fractures is affected by age of the patient. This study aims to assess the incidence and early outcome of hip fractures, comparing between different age groups.</p> <p>Methods</p> <p>Data of hip fractures collected over a period of five years was analysed. Patients were divided into three groups, group A (patients under the age of 64), group B (patients between 65 and 84 years of age), and group C (patients over the age of 85).</p> <p>Results</p> <p>Of the 1177 patients included in the study, there were 90 patients in group A, 702 patients in group B and 385 patients in group C. There was a female preponderance across all age groups, and this increased as age advanced (p < 0.0001). A significantly larger number of older patients lived alone and needed aids to walk before the injury (p < 0.0001). There was no significant difference in the type of fracture across the three groups (p = 0.13). A higher proportion of the elderly with intracapsular fractures were treated by replacement arthroplasty. Older patients who had internal fixation of intracapsular fractures had a better walking ability at 4 months. The overall deterioration in mobility was greater in older patients (p < 0.0001). Mortality was higher in older patients.</p> <p>Conclusions</p> <p>Hip fractures are more common among females irrespective of age group. Older patients have a higher mortality and a greater deterioration of walking ability after such injuries. Internal fixation of intracapsular fractures have demonstrated satisfactory early outcome in the immediate period. This could be attributed to retention of native bone, better propioception and shorter operation time.</p

Migrating Ingested Foreign Body of the Upper Aerodigestive Tract with Resultant Septic Shock : Case report and literature review

Complications due to foreign body ingestion are rare; however, if present, these can cause significant morbidity to the patient. An overlooked ingested foreign body could present as an emergency and may prove fatal. We present a case of an accidentally ingested foreign body with delayed presentation, which migrated to the neck and produced a cervical abscess presenting as septic shock. The patient required prompt stabilisation followed by surgical intervention. The patient’s vital signs returned to normal on the second post-operative day, and he was discharged the following day

Complete transection of permanent pacemaker lead by a dislocated left shoulder prosthesis

A case of complete transection of the leads of a permanent pacemaker (PPM) by a dislocated left shoulder prosthesis is reported. An 86 year old woman with a history of B-cell lymphoma diagnosed subsequent to a pathological fracture of the humerus in 2010 was managed by a left shoulder replacement. Subsequently, she underwent chemotherapy for the B-cell lymphoma and the malignant lesion was reported to have resolved. In addition, she further went on to have a PPM- left sided DDDR inserted in 2015 for chronotropic incompetence. Following a mechanical fall she had in 2021, it was found that the PPM leads had been damaged, transected, potentially infected and failing to capture along with a displaced left shoulder prosthesis which was the likely culprit for the PPM damage. A decision was made to not remove the dislocated prosthesis by the multidisciplinary team managing her. This case highlights the importance of an understanding of the complications of shoulder surgeries, including approach adopted for surgery in patients with pacemaker in-situ and the need for regular follow up and imaging

Neonatal seizures: our experience of incidence, etiology and outcome in a tertiary care centre

Context: Neonatal seizures often evoke a sense of urgency among physician in charge of newborn as they oftenindicate a CNS dysfunction. Incidence of neonatal seizures remains high in our community even in this era ofadvanced perinatal care. Early detection of seizure and its etiology help us to provide specific therapy.Objectives: The purpose of this study was to determine the incidence, etiology and outcome of neonatalseizures. Settings and design: Prospective hospital based descriptive study conducted in the neonatal unit oftertiary care hospital. Material and methods: Consecutive newborns admitted with seizures were included inthis study. Data were collected regarding relevant history and examination, thoroughly evaluated for etiologyand outcome was documented. Analysed by descriptive statistics and conclusions were drawn. Results: Onehundred and eight newborns with seizures were included during study period and incidence of neonatal seizurewas 5.5%. Hypoxic ischemic encephalopathy (HIE) and sepsis constituted the most common etiologies. HIEwas the most common etiology associated with mortality. Abnormal EEG with supressed background activitywas present in majority of mortality cases. Conclusion: Most of the cases had multifactorial etiology. Measuresfor prevention, prompt recognition and specific management of neonatal seizure help to reduce the burden ofneonatal morbidity in the community