13 research outputs found
Fine needle aspiration cytology of chondroblastoma: A report of two cases with brief review of pitfalls
No full textChondroblastoma is a rare, giant cell-rich, benign neoplasm of bone. Since the past few decades fine needle aspiration cytology (FNAC) has gained momentum in preoperative diagnosis of bone lesions. At cytology, other giant cell-rich tumors and tumorlike lesions such as aneurysmal bone cyst (ABC), giant cell tumor, and chondromyxoid fibroma fall under the differential diagnosis of chondroblastoma. Due to the difference in the treatment protocol and prognosis, preoperative diagnosis is mandatory. We describe the cytomorphology in two cases of chondroblastoma diagnosed at FNAC and confirmed by histopathology. At cytology, the presence of giant cells, chondroid matrix, mononuclear cells with nuclear indentation, and grooving along with glassy, vacuolated cytoplasm are characteristic of chondroblastoma. In addition to this, the presence of chicken wire calcification is a useful clue to the accurate diagnosis of chondroblastoma at FNAC
Candida Albicans Infection Masquerading as a Soft Tissue Tumour Diagnosed by Fine Needle Aspiration Cytology
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Model validation and feasibility analysis of Modelica based dynamic simulations using OpenIPSL and CGMES
No full textThe European Union’s energy and climate policy objectives for 2030 targets to achieve at least 27% of the generated electricity from renewables. Such large-scale integration of renewable Energy Sources (RES) into the grid, will have drastic effects on the electricity grid structure, system operations and the functioning of the electricity market itself. In order to tackle the intermittency challenges posed by RES, smarter operating processes are essential. This requires accurate simulation tools and an efficient exchange of information between the energy players in Europe (TSOs, DSOs and other private generators). The Common Grid Model Exchange Standard (CGMES) was developed to support data exchanges between these energy players. The CGMES based Common Information Model (CGMES-CIM) files contain all the information about the grid under study including the powerflow values. The current version of CGMES-CIM supports full interoperability with respect to steady state simulations but is quite challenging to use for dynamic simulations. Open-Instance Power System Library (OpenIPSL), which is a Modelica based power system library, seems to be one of the possible solutions that can overcome the interoperability issue with respect to dynamic simulations. This thesis focuses on extending the OpenIPSL with PowerFactory based models and provides a proof of concept to automatically initialize the Modelica grid model using CGMES-CIM. OpenModelica, an open-source Modelica simulation environment is used in this project to carry out dynamic studies on a modified Bonneville Power Administration (BPA) grid model. In order to perform dynamic studies, the Modelica grid model first needs to be populated with powerflow values. OpenModelica does not include powerflow option and therefore, powerflow solution needs to be obtained from another simulation tool and the values need to be subsequently loaded into OpenModelica to perform dynamic simulations; this process is called Initialization. Thus, to overcome the challenges with initialization of Modelica models, this thesis presents a proof of concept that directly utilizes the CGMES-CIM files for initialization of Modelica based grid models. The interfacing process between CIM and Modelica based grid model isdone using Python.To test the concept, Modelica based dynamic simulations were carried out and compared with reference results (signal records obtained through time domain simulations) from PowerFactory. For this purpose, several PowerFactory based Modelica models were developed and validated, extending the OpenIPSL. These models were subsequently used to create and validate a modified BPA grid model, which serves as a test case. This thesis also proposes a method to directly convert CGMES-CIM files to Modelica files. This conversion helps achievecomplete automation of dynamic simulations in a Modelica environment. Therefore, this thesis contributes to the OpenIPSL by developing PowerFactory based models and, also proposes a new CGMES-CIM to Modelica converter.Electrical Engineering | Sustainable Energy Technolog
Co-simulation and Dynamic Model Exchange with Consideration for Wind Projects
No full textThis paper discusses and compares two approaches to address technical challenges in performing collaborative studies of power system dynamics. On one side, we consider the model migration approach which is an essential piece of dynamic model exchange. On the other side, we look at the co-simulation approach which is used to couple simulation tools together. The approaches are compared in terms of accuracy and the most probable reasons for discrepancy between dynamic responses are discussed. We complement the discussion and conclusions with the simulation results on a simple test system.Intelligent Electrical Power Grid
Eosinophilic Gastroenteritis Presenting as Intestinal Obstruction - A Case Series.
No full textEosinophilic Gastroenteritis is a rare disease characterized by infiltration of the gastrointestinal tract by an increased number of eosinophils as compared to the normal. The anatomic location and intensity of the infiltrate decides the varied clinical symptomatology with which these patients present. The present report deals with four cases, all presenting with clinical signs of intestinal obstruction A laparotomy performed revealed a stricture in the first case, superficial ulcers and adhesions in the second case, an ileocaecal mass in the third case and volvulus formation in the fourth case. Eosinophilic gastroenteritis was confirmed on histopathology in all the four cases. All the four patients experienced relief of symptoms after resection. It is essential to diagnose the disease to differentiate it from other conditions presenting as intestinal obstruction. The cases are presented because of the rarity of occurrence and presentation. Relevant literature has been reviewed
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No full textNot AvailableEngineering properties of groundnut pods play an essential role in designing of threshing equipment, in order to
decide the cylinder speed, concave clearance, sieve sizes and seed drop mechanisms. The present study aimed to determine the engineering properties of pods of six groundnut varieties viz., ICGV-00351, KADARI-9, R-8808, R-2001-2, R-2001-3 and TMV-2. The results revealed that, the computed mean value of roundness and perimeter were found
to be 0.72 and 78.53 mm, respectively. The sphericity and surface area of all the varieties were in the rage of 0.62 to 0.71 and 605.26 to 778.43 mm2 with a mean value of 0.66 and 692.69 mm2, respectively. The geometric mean, arithmetic mean, square mean and equivalent diameter were found to be 14.82, 15.89, 22.13 and 17.62 mm, respectively with an average bulk density of 0.26 g cm-3. The mean value of pod-vine ratio for six groundnut varieties was found to be 3.59. The groundnut pods were neither round nor spherical, but oblong in shape. It was observed that, the mean value of force required to detach the pod from vine was found to be 4.28 kg. The terminal velocity of groundnut pod and vine were found to be 8.73 and 3.91 m s-1, respectively. The angle of repose of groundnut pods ranged from 26.36° for TMV-2 to 29.09° for R-8808. The mean
values of coefficient of friction of the selected varieties of groundnut pods on plywood, MS sheet and wood were found to be 0.559, 0.406 and 0.623, respectively.The authors would like to acknowledge with thanks the Dept. of Science and Technology (DST), Ministry of Science and Technology, Govt. of India for having sanctioned INSPIRE Fellowship to the Ph.D. Scholar (IF 130777) which facilitated him to carry out the present study. This paper is a part of the Ph.D. research work of the first author registered at University of Agricultural Sciences, Raichur, Karnataka, India
Fluid Overload in Critically Ill Children
No full textBackground: A common practice in the management of critically ill patients is fluid resuscitation. An excessive administration of fluids can lead to an imbalance in fluid homeostasis and cause fluid overload (FO). In pediatric critical care patients, FO can lead to a multitude of adverse effects and increased risk of morbidity.Objectives: To review the literature highlighting impact of FO on a multitude of outcomes in critically-ill children, causative vs. associative relationship of FO with critical illness and current pediatric fluid management guidelines.Data Sources: A literature search was conducted using PubMed/Medline and Embase databases from the earliest available date until June 2017.Data Extraction: Two authors independently reviewed the titles and abstracts of all articles which were assessed for inclusion. The manuscripts of studies deemed relevant to the objectives of this review were then retrieved and associated reference lists hand-searched.Data Synthesis: Articles were segregated into various categories namely pathophysiology and sequelae of fluid overload, assessment techniques, epidemiology and fluid management. Each author reviewed the selected articles in categories assigned to them. All authors participated in the final review process.Conclusions: Recent evidence has purported a relationship between mortality and FO, which can be validated by prospective RCTs (randomized controlled trials). The current literature demonstrates that “clinically significant” degree of FO could be below 10%. The lack of a standardized method to assess FB (fluid balance) and a universal definition of FO are issues that need to be addressed. To date, the impact of early goal directed therapy and utility of hemodynamic parameters in predicting fluid responsiveness remains underexplored in pediatric resuscitation
