Using simulation to calibrate real data acquisition in veterinary medicine

This paper explores the innovative use of simulation environments to enhance data acquisition and diagnostics in veterinary medicine, focusing specifically on gait analysis in dogs. The study harnesses the power of Blender and the Blenderproc library to generate synthetic datasets that reflect diverse anatomical, environmental, and behavioral conditions. The generated data, represented in graph form and standardized for optimal analysis, is utilized to train machine learning algorithms for identifying normal and abnormal gaits. Two distinct datasets with varying degrees of camera angle granularity are created to further investigate the influence of camera perspective on model accuracy. Preliminary results suggest that this simulation-based approach holds promise for advancing veterinary diagnostics by enabling more precise data acquisition and more effective machine learning models. By integrating synthetic and real-world patient data, the study lays a robust foundation for improving overall effectiveness and efficiency in veterinary medicine

Analiza metod detekcji dyfrakcyjnych linii Kikuchiego praca doktorska /

Tyt. z ekranu tytułowego.Na prośbe autora do pracy dodany został link zawierający erratę z uzupełnioną bibliografią.Praca doktorska. Akademia Górniczo-Hutnicza im. Stanisława Staszica (Kraków), 2007.Bibliogr.Dostępna także w wersji drukowanej.Tryb dostępu: Internet.Obrazy dyfrakcyjne typu Kikuchiego w mikroskopii elektronowej, mechanizm powstawania obrazów dyfrakcyjnych w mikroskopie skaningowym, transmisyjnym, metody analizy, przetwarzania obrazów stosowane w pracy, transformacja Fouriera, Radona, Hougha, metody obliczeniowe, zastosowania, ciągła transformacja falkowa, dyskretna, transformacja ridgelet, curvelet, liniowa filtracja w dziedzinie przestrzeni, nieliniowa, metoda pochodnych cząstkowych, filtracja przestrzenno-częstotliwościowa, w dziedzinie współczynników transformacji falkowej, za pomocą przestrajanych filtrów kierunkowych, metody klasyfikacji stosowane w pracy, algorytmy nienadzorowane, nadzorowane, algorytm rozmytych k-średnich, Gustafsona-Kessla, k-najbliższych sąsiadów, MMD, metoda wektorów nośnych, przypadek liniowo separowalny, nieseparowalny, klasyfikacja nieliniowa, sieci neuronowe, matematyczny model neuronu, warstwy sieci neuronowej, wstępne, końcowe przetwarzanie danych, klasyczny algorytm wstecznej propagacji błędu, momentowa metoda wstecznej propagacji błędu, skanowanie obrazu za pomocą specjalnej maski, struktura algorytmu, wstępne przetwarzanie obrazu źródłowego, odszumianie obrazu, wyrównanie nierównomiernego tła, detekcja, usunięcie artefaktów, pętla główna, filtracja za pomocą maski Sobela, skanowanie obrazu za pomocą maski złożonej z trzech linii prostych, detekcja linii na podstawie analizy zmienności parametru p, wyznaczenie najbardziej prawdopodobnego położenia linii, wpływ wartości progu θp na skuteczność algorytmu, wpływ zastosowanej maski filtrującej na skuteczność algorytmu, wpływ nierównomiernego oświetlenia obrazu, porównanie skuteczności opracowanego algorytmu z algorytmem referencyjnym, modyfikacja transformacji Hougha, filtracja kierunkowa, binaryzacja, przetwarzanie obrazu binarnego, zmodyfikowana transformacja Hougha, ekstrakcja maksimów w przestrzeni transformacji Hougha, weryfikacja, wyodrębnienie par linii równoległych, zastosowanie zaawansowanych metod przetwarzania obrazów, klasyfikacji, estymacja poziomu szumu, zwiększenie kontrastu za pomocą modyfikacji krzywej tonalnej, transformacji curvelet, detekcja maksimów, proste progowanie, ST, analiza lokalnego kontrastu, LCA, klasyfikacja cech, FC, analiza profilu, PPA, poszukiwanie brakujących linii, optymalizacja metody, dobór opcji, wartości parametrów, czas wykonania poszczególnych etapów algorytmu, ocena wpływu poszczególnych etapów na wyniki końcow

Parallelized algorithms for finding similar images and object recognition

Tyt. z nagłówka.Bibliogr. s. 126-127.The paper addresses the issue of searching for similar images and objects in arepository of information. The contained images are annotated with the help of the sparse descriptors. In the presented research, different color and edge histogram descriptors were used. To measure similarities among images,various color descriptors are compared. For this purpose different distance measures were employed. In order to decrease execution time, several code optimization and parallelization methods are proposed. Results of these experiments, as well as discussion of the advantages and limitations of different combinations of metods are presented.Dostępny również w formie drukowanej.KEYWORDS: color descriptors, code optimization, parallelization, OpenMP

Nitriding of 316L Steel in a Glow Discharge Plasma

The article presents the results of the research on the nitriding process of 316L austenitic steel and the change in surface properties resulting from this process used in medicine, orthopedics, and in fuel cells. The processes were carried out with the following parameters: time from 5 to 17 h, temperature from 430 °C to 490 °C. The study presents the results of tests of the 316L austenitic steel substrate layer subjected to plasma nitriding of a direct current glow discharge, i.e., in the area isolated from both the cathode and the anode. Additionally, the influence of the active screen on the nitriding process in this area of the direct current discharge was studied. The following tests were carried out: nitrogen diffusion depth test, hardness test, wear resistance test, microstructure analysis, corrosion resistance, and distribution of the element concentration in the surface layer. The research allowed for the conclusion that each variant of nitriding contributed to a change in the examined properties, while the observed scale and nature of the changes were different

Does hiatal hernia impact gastro-oesophageal reflux-related chronic cough?

Background Hiatal hernia may coexist with gastro-oesophageal reflux (GOR)-related chronic cough. This study aimed to evaluate whether the presence of hiatal hernia was related to chronic cough severity and the response to antireflux therapy. Methods This was a retrospective analysis of data on adults with GOR-related chronic cough managed in our cough centre between 2017 and 2021. Patients who had undergone chest computed tomography (CT) and in whom follow-up data were available were included. The presence and size of hiatal hernia were assessed based on thorax CT scanning. Patients were treated with modification of diet and proton pump inhibitors. The response to treatment was assessed by the change in quality of life (QOL) measured by Leicester Cough Questionnaire (LCQ) and cough severity was measured by 100-mm visual analogue scale. Results 45 adults (28 female, 17 male) were included. Hiatal hernia was demonstrated in 12 (26.6%) patients. Patients with hiatal hernia did not differ from those without hiatal hernia in clinical characteristics, cough duration and severity and cough-related QOL. We found moderate positive correlations between maximal sagittal diameter of hiatal hernia and cough severity (ρ=0.692, p=0.013) and duration (ρ=0.720, p=0.008). Patients without hiatal hernia responded better to antireflux therapy, with significant LCQ improvement. A strong negative correlation between sagittal diameter of hiatal hernia gate and increase in LCQ (ρ= −0.764, p=0.004) was demonstrated. Conclusion The presence of hiatal hernia identified in chest CT may impact cough severity, duration and response to antireflux treatment in patients with GOR-related chronic cough. Further prospective studies are justified to confirm significance of hiatal hernia in the management of chronic cough

Diaryl ethers with carboxymethoxyphenacyl motif as potent HIV-1 reverse transcriptase inhibitors with improved solubility

<p>In search of new non-nucleoside reverse transcriptase inhibitors (NNRTIs) with improved solubility, two series of novel diaryl ethers with phenacyl moiety were designed and evaluated for their HIV-1 reverse transcriptase inhibition potentials. All compounds exhibited good to excellent results with IC₅₀ at low micromolar to submicromolar concentrations. Two most active compounds (<b>7e</b> and <b>7 g</b>) exhibit inhibitory potency comparable or even better than that of nevirapine and rilpivirine. Furthermore, SupT1 and CD4⁺ cell infectivity assays for the most promising (<b>7e</b>) have confirmed its strong antiviral potential while docking studies indicate a novel binding interactions responsible for high activity.</p

1000 Liver Transplantations at the Department of General, Transplant and Liver Surgery, Medical University of Warsaw - Analysis of Indications and Results

The aim of the study was to analyze indications and results of the first one thousand liver transplantations at Chair and Clinic of General, Transplantation and Liver Surgery, Medical University of Warsaw.Material and methods. Data from 1000 transplantations (944 patients) performed at Chair and Clinic of General, Transplantation and Liver Surgery between 1994 and 2011 were analyzed retrospectively. These included 943 first transplantations and 55 retransplantations and 2 re-retransplantations. Frequency of particular indications for first transplantation and retransplantations was established. Perioperative mortality was defined as death within 30 days after the transplantation. Kaplan-Meier survival analysis was used to estimate 5-year patient and graft survival.Results. The most common indications for first transplantation included: liver failure caused by hepatitis C infection (27.8%) and hepatitis B infection (18%) and alcoholic liver disease (17.7%). Early ( 6 months) retransplantations were dominated by hepatic artery thrombosis (54.3%) and recurrence of the underlying disease (45%). Perioperative mortality rate was 8.9% for first transplantations and 34.5% for retransplantations. Five-year patient and graft survival rate was 74.3% and 71%, respectively, after first transplantations and 54.7% and 52.9%, respectively, after retransplantations.Conclusions. Development of liver transplantation program provided more than 1000 transplantations and excellent long-term results. Liver failure caused by hepatitis C and B infections remains the most common cause of liver transplantation and structure of other indications is consistent with European data

1000 Liver Transplantations at the Department of General, Transplant and Liver Surgery, Medical University of Warsaw - Analysis of Indications and Results

The aim of the study was to analyze indications and results of the first one thousand liver transplantations at Chair and Clinic of General, Transplantation and Liver Surgery, Medical University of Warsaw.Material and methods. Data from 1000 transplantations (944 patients) performed at Chair and Clinic of General, Transplantation and Liver Surgery between 1994 and 2011 were analyzed retrospectively. These included 943 first transplantations and 55 retransplantations and 2 re-retransplantations. Frequency of particular indications for first transplantation and retransplantations was established. Perioperative mortality was defined as death within 30 days after the transplantation. Kaplan-Meier survival analysis was used to estimate 5-year patient and graft survival.Results. The most common indications for first transplantation included: liver failure caused by hepatitis C infection (27.8%) and hepatitis B infection (18%) and alcoholic liver disease (17.7%). Early ( 6 months) retransplantations were dominated by hepatic artery thrombosis (54.3%) and recurrence of the underlying disease (45%). Perioperative mortality rate was 8.9% for first transplantations and 34.5% for retransplantations. Five-year patient and graft survival rate was 74.3% and 71%, respectively, after first transplantations and 54.7% and 52.9%, respectively, after retransplantations.Conclusions. Development of liver transplantation program provided more than 1000 transplantations and excellent long-term results. Liver failure caused by hepatitis C and B infections remains the most common cause of liver transplantation and structure of other indications is consistent with European data