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Modeling of low calorific gas burning in a deficient oxygen environment and high-temperature oxidizer

Published on: 15th March, 2023

It is planned to carry out a comprehensive experimental and theoretical study on the high temperature of low calorific gas combustion with oxygen-deficient oxidizers. The experimental research will be performed using the experimental facility with a combustion chamber. The oxygen concentration in combustion oxidizers will be varied from 21% by volume (normal) air to 2%. The test combustion chamber will be fed with propane or methane as the reference fuel, then with low calorific fuels as test gases obtained by mixing various combustible components, e.g. H2, CH4, CO, and neutral gases, e.g. N2, CO2. Gaseous fuels prepared in this way will be burned in the atmosphere of a deficient oxidizer with a temperature changing from 800 °C to 1100 °C. Oxidizers will be heated up to a certain temperature using two methods: by flue gas heat exchanger and kanthal rod electric preheater. Different burner geometry will be used. The burner will be equipped with annular swirl vanes for co-axial or under different angles, fuel, and oxidizers flow to have a high swirl number achieved by flow aerodynamics and mixing. Experimental data will be verified with numerical simulations with the use of ANSYS CFD Fluent code.
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Capabilities Approaches Applied to the Homes of the Future

Published on: 30th July, 2025

The capabilities approach, based on the work of Sen and Nussbaum, proposes a transformation in housing design by prioritizing human well-being over economic criteria. This framework assesses individuals’ real opportunities to develop fulfilling lives (“capabilities”), responding to contemporary challenges such as climate change and urbanization. Recent studies indicate that 68% of architects integrate this approach into sustainable projects (Chen, et al. Journal of Sustainable Architecture, 2023, Q1), demonstrating its relevance for creating resilient and inclusive environments. The methodology combines theoretical analysis (UTAUT model for technology adoption and the capabilities approach) with global case studies. Designs are examined that incorporate: Smart technology: IoT and AI systems for security and energy efficiency; Biophilic design: Integrating nature into interior spaces; and Net-Zero Homes (NZEH): Energy self-sufficiency through renewables. Data were collected from projects in Belgium, Australia, and the US, assessing social and environmental impact using well-being and sustainability metrics. We determined the results and discussed the approach using Positive Impact: Smart-technology homes improve autonomy in older adults by 72% (Liu, et al. Gerontology, 2022, Q1). Projects such as Savonnerie Heymans (Brussels) reduced energy consumption by 40% through solar panels and thermal insulation, while increasing social cohesion with community spaces. Biophilic design: Associated with 30% less stress and 25% higher productivity; Barriers: High initial costs (up to 20% more than conventional housing) and regulatory complexity limit widespread adoption. Furthermore, feminist and decolonial critics warn that the approach can perpetuate inequalities if it ignores sociopolitical contexts. In conclusion, the capabilities approach revolutionizes future housing by merging human well-being, sustainability, and inclusion. However, its implementation requires overcoming economic and ethical challenges: Accessibility: Universal designs for vulnerable populations. Collaborative governance: Policies that balance innovation, data privacy, and affordability. Cultural adaptation: Integration of non-Western perspectives. Projections indicate that NZEHs will grow by 40% by 2030, highlighting their potential to build equitable and resilient societies.
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About Efficiency of High-order Harmonic Generation in Attosecond Physics

Published on: 29th October, 2024

For the first time, the interaction between Hydrogen atom and Free-Electron Lasers (FEL) is simulated. The conversion efficiency of High-order Harmonic Generation (HHG) can be enhanced by utilizing a two-color free electron laser with frequency multiplication. It is found that the conversion efficiency of HHG is improved to the largest extent when fourth-fold frequency multiplication is introduced into two-color FEL. The microscopic mechanism of improving the efficiency of HHG is analyzed and discussed.
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A Critical Review on Some Recent Developments in Comparison of Biological Sequences

Published on: 25th April, 2024

The present review highlights some of the very important contributions to non-alignment ways of comparing biological sequences, which may be genome sequences of nucleotides, protein sequences of amino acids, or sequences of protein secondary structures. The discussion centers around specific methods applicable to the comparison of three types of sequences. The methods of comparison of genome sequences are based on three pairs of biological groups of nucleotides; the same for protein sequences are based on either physio-chemical property values of amino acids or on classified groups of amino acids of different cardinalities obtained from the physio-chemical properties; the same for sequences of secondary structures of proteins are based on their sequential expressions of structure elements of cardinality three and four. Comparison is made in the time domain and also in the frequency domain. Different taxa of known phylogeny are considered for comparison. It tries to find out the specific method of comparison, which can show the exact phylogeny of the taxa. If a new sequence appears in the database, it becomes essential to know its phylogeny. For this purpose, a phylogenetic tree is drawn on the sequences of the known taxa together with this new sequence using the best possible method. If the species having this new sequence belongs to the old taxa, there is nothing to worry about. Otherwise, the species with the new sequence has to be studied separately. This is the general reason for the construction of a phylogenetic tree in any form of biological sequence comparison.
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Bouveret Syndrome in an Elderly Female

Published on: 3rd January, 2017

OCLC Number/Unique Identifier: 7317627575

Introduction: A gastric outlet obstruction secondary to a gallstone ileus is known as Bouveret syndrome. Herein we present a case of an elderly woman with an impacted gallstone in duodenum and discuss its’ management. Patient description: A 96-year-old woman was admitted to our department due to a gastric outlet obstruction. Initial gastroscopy revealed a gastric bezoar. An attempt for its extraction failed. She underwent a laparotomy in which a cholecystoduodenal fistula and a large impacted stone were found. Separation of the fistula, including closure of the duodenum side, cholecystectomy and removal of the obstructing gallstone were performed. Additional stones were found and retrieved during common bile duct (CBD) exploration. Surgery was finalized by duodenoplasty, closure and T-tube drainage of the CBD. Post-operative course was prolonged and uneventful. Discussion and Conclusions: Bouveret syndrome is a rare cause of gastric outlet obstructions. In this case, unsuccessful endoscopic treatment necessitated surgery for removal of impacted gallstone in the duodenum.
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Hepatic adenomatosis: A clinically challenging rare liver disease

Published on: 11th July, 2018

OCLC Number/Unique Identifier: 7828397085

43-year-old lady presented with incidentally discovered liver lesions while she was being managed for her complaints of menorrhagia. CT and MRI showed hepatomegaly with multiple lesions in both lobes of the liver with vascular element in the background of diffuse fatty infiltration. Patient underwent laparoscopic core biopsy. Histopathology showed extensive steatosis, intracytoplasmic giant mitochondria and absence of portal tracts, features highly suggestive of hepatic adenomatosis. IHC staining showed membranous and cytoplasmic positivity in hepatocytes for B-catenin consistent with multiple hepatic adenomatosis. Hepatic adenomatosis is a new clinical entity in the hepatological practice characterized by the presence of 10 or more nodules in the liver known for its major complication of bleeding. Hepatic adenomatosis is managed by regular imaging and resection of large (> 5cm) superficial and painful adenomas along with liver function tests and tumor markers to rule out malignant transformation. However, the potential cure being the liver transplantation.
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Intestinal obstruction complicated by large Morgagni hernia

Published on: 27th March, 2017

OCLC Number/Unique Identifier: 7317596428

Morgagni hernia represents 2-4% of congenital diaphragmatic hernias. Only one-third of them are symptomatic, due to the hernia of abdominal viscera in the thoracic cavity, causing respiratory and digestive problems, some of them serious ones, such as intestinal obstruction. Acute presentation with incarceration of the contents is rare; there are only 7 cases described in the literature. We are presenting a case of diaphragmatic hernia that began with obstruction of the colon and secondary ischemia, requiring emergency surgery in two phases: first surgery to control the damage, with an open right hemicolectomy, and then later surgery to repair the hernia and perform bowel transit reconstruction, with proper postoperative evolution and no evidence of relapse. The treatment of Morgagni diaphragmatic hernia is surgical. Also in asymptomatic cases, due to the risk of incarceration, the most appropriate way to enter is abdominally, whether by way of laparotomy or laparoscopy, for the reduction of the contents of the hernia sac, the repair of the defect, as well as the performing of associated techniques on herniated viscera, as occurred in our case. A complicated congenital hernia is an infrequent pathology, and there is little experience in handling it. Acute presentation requires a combined treatment of the abdominal symptoms and repair of the hernia defect. The carrying over of surgical techniques for damage control into non-traumatic surgery in the face of serious hemodynamic instability is a widespread, accepted practice with the benefits of reducing mortality in critical patients and at times allowing the avoidance of ostomies.
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Clinical significance of Urinary Amylase in Acute Pancreatitis

Published on: 27th June, 2017

OCLC Number/Unique Identifier: 7317596310

Acute pancreatitis forms a major bulk of our inpatient admission due to gall stone disease. Diagnosis of acute pancreatitis remains a challenge even now. Serum amylase remains the most commonly used biochemical marker for its diagnosis but its sensitivity can be reduced by late presentation, hyper-triglyceridemia and chronic alcoholism. We conducted a study to determine the levels of serum and urinary amylase in patients with acute pancreatitis and compared their sensitivity and correlation with CT findings vis-à-vis the severity of the disease. The study was taken as a post graduate research model in the Post graduate Department of General and Minimal Access Surgery, Govt. Medical College Srinagar, J&K, India 2014-2016 and submitted for the award of masters in General Surgery. A total number of 150 patients were enrolled in the studies which were admitted in our unit as acute pancreatitis. 73 (48.7%) belonged to the age group of 30-44 years, 15(10%) patients aged >60 years with 86 (57.3%) males and 64 (42.7%) females. We had 81 (54%) patients with biliary tract diseases, followed by 21 (14%) patients with worm induced, 20 (13.3%) had hyperlipidaemia and only 4 (2.7%) patients had post ERCP etiology. Tenderness in epigastrium was the presenting sign in 111 (74%), followed by chest signs in 25 (16.7%) patients, diffuse tenderness in 19 (12.7%), icterus in 11 (7.3%), low grade fever in 9 (6%) patients, shock in 5 (3.3%). Diabetes mellitus as a comorbidity was observed in 48 (32%) patients followed by hypothyroidism 37 (24.7%) patients. Hypertension was seen in 31 (20.7%) patients, COPD in 19 (12.7%) patients and obesity in 13 (8.7%) patients. Twenty two (14.7%) needed ICU admission; while as 128 (85.3%) were managed in the general ward. All the enrolled patients in our study were managed conservatively. Out of a total of 150 patients, 148 (98.7%) survived while as only 2 (1.3%) of our patients expired. At the time of admission in the hospital, 120 (80%) patients had serum amylase level of >450 U/L, 19 (12.7%) patients had 150-450 U/L levels while as 11 (7.3%) patients had <150 U/L serum amylase levels. CT has been shown to yield an early overall detection rate of 90% with close to 100% sensitivity after 4 days for pancreatic gland necrosis. The correlation of urinary amylase with the CECT Severity Scoring in a patient of acute pancreatitis is still ambiguous.
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Surgery and new Pharmacological strategy in some atherosclerotic chronic and acute conditions

Published on: 18th August, 2017

OCLC Number/Unique Identifier: 7317601909

Introduction In actual pharmacological therapy we can see that some drugs can be added to other medical instruments to improve their activity: in example we can see medicated stent for some coronary disease, or hormonal medical devices used in pregnancy prevention, but other example are known today. In example Carmustine wafer is delivered by delivery systems in some brain cancer and radioactive seed implants in prostatic cancer. Ocular intra vitreal implants for some macular degenerations (MABS or cortisones) other implants delivery systems drugs, naltrexone implant for opiate dependence. Other strategies imply carrier use to deliver the drugs in the site of action: In example MABS linked to radioactive isotopes in some relapse of severe Hodgkin disease but many other example we can see in therapy used today. So we can think that other chronic conditions can be treated using a combination of drugs with other instrument to improve the clinical outcomes. This to make possible that the ERLICH MUGIC BULLETS can act in the right site reducing the side effect. In example today we can see various medical interventional radiological strategy to treat in coronary and hearth disease with medicate stents positioning or to local use of contrast agents or other valvle surgery procedures with global good clinical results.
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Comments for the Nuremberg Code 70 Years Later

Published on: 20th October, 2017

OCLC Number/Unique Identifier: 7317654647

The story of Nuremberg code in human experiments was evolved by a 70-year old historical link, aiming to provide an alert message for scientists in case of non-provisional disaster caused by immoral human experiment. It played a safeguard role standing on the front line [1]. We really can see something what authors feared in this article. We fully agree with the authors about the general concepts, but we feel something is missing on current problems: the illegal abuse of medical materials and the underground human experiments. What we should do is to enrich its new implications of Nuremberg code and then put it embedded in human brain.
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