3D and 4D Seismic Technics Today

Years ago, exploration was done through surface observations and divining rods now, it is done by satellites, microprocessors, remote sensing, and supercomputers. In the 1970´ s, the exploration success rate was 14 percent, today, it is nearly 29 percent. Not so long ago, three dimension (3D) seismic diagnostic techniques helped recover 25-50 percent of the oil in place now, 4D seismic helps recover up to 70 percent of the oil in place. 3D and 4D seismic and earth imaging systems also help in understanding the subsurface flow of other fluids, such as groundwater and pollutants.Seismic surveys a technique in which sound waves are bounced off underground rock struktures to reveal possible oil and gas bearing formation are now standard fare for the modern petroleum industry. But todays seismic methods are best at locating structural traps where faults or folds in the underground rock have created zones where oil can become trapped

Biasogram: visualization of confounding technical bias in gene expression data.

Gene expression profiles of clinical cohorts can be used to identify genes that are correlated with a clinical variable of interest such as patient outcome or response to a particular drug. However, expression measurements are susceptible to technical bias caused by variation in extraneous factors such as RNA quality and array hybridization conditions. If such technical bias is correlated with the clinical variable of interest, the likelihood of identifying false positive genes is increased. Here we describe a method to visualize an expression matrix as a projection of all genes onto a plane defined by a clinical variable and a technical nuisance variable. The resulting plot indicates the extent to which each gene is correlated with the clinical variable or the technical variable. We demonstrate this method by applying it to three clinical trial microarray data sets, one of which identified genes that may have been driven by a confounding technical variable. This approach can be used as a quality control step to identify data sets that are likely to yield false positive results

Percutaneous direct thrombin injection with hydrodissection to manage type II endoleak after endovascular abdominal aortic aneurysm repair

Type II endoleak is the most common complication after endovascular abdominal aortic aneurysm repair (EVAR). The management remains controversial. We present a case in which endoleak was successfully treated by direct percutaneous thrombin injection with hydrodissection. This method seems to be a safe and feasible alternative method for treatment of type II endoleak

Telehealth during the COVID-19 pandemic regarding children with plano-valgus foot after subtalar arthroereisis

Introduction: The COVID-19 pandemic brought about numerous changes. Access to health services was limited, and restrictions were imposed to prevent the spread of the disease. Consequently physical activity of children was limited due to their increased time at home, which could result in reduced physical performance and abnormal development. Aim: This study aimed to assess the access to physiotherapy and the use of telemedicine regarding children after subtalar arthroereisis surgery during the COVID-19 pandemic. Material and methods: Seventy-nine parents/guardians of children who underwent subtalar arthroereisis surgery at Chorzow Municipal Hospital Complex between May 2019 and May 2021 participated in the study. A self-administered questionnaire designed for the study was used as the research method. Results: The results showed that some respondents perceived the wait times at the National Health Service and the cost of private services as problems during the COVID-19 pandemic. However, increased problems associated with general access or course of treatment were not confirmed. Sixty-seven percent of respondents confirmed decreased physical activity in children due to the COVID-19 pandemic. One-third of parents noticed weight gain and muscle weakness in their children, while for 56% of respondents, the weight gain was not noticeable. In addition, more than 70% of the children had no complaints of pain. The results also showed that only 36.8% of respondents used telemedicine during the pandemic. Conclusions: The constraints imposed by the COVID-19 pandemic caused a decline in children’s physical activity; one-third of parents reported weight gain in their children. In addition, waiting times for physiotherapy reimbursed by the National Health Fund were long, and the cost of private physiotherapy was higher; it could not be confirmed whether more patients subsequently used telemedicine

Treatment for plano-valgus foot in children with subtalar arthroereisis. A review

Plano-valgus foot is a common problem among children and adolescents. The problem is most often noticed in early childhood, as this is the period when the arches of the foot should achieve a normal structure through the disappearance of the fat pad that is present from birth. During this period, the child's skeletal system is very malleable and its remodelling can be considerably influenced by additional factors. This is due to the high amount of cartilage tissue present in a child's skeletal system. Plano-valgus foot can be treated with non-operative methods, such as physiotherapy or the use of orthopaedic supplies, such as suitable orthopaedic insoles. Unfortunately, non-operative treatment is not always sufficient. If physiotherapy does not achieve the expected results, a physician may opt for surgical treatment to restore a correct foot alignment. The most commonly performed plano-valgus foot procedure is subtalar arthroereisis. It is a minimally invasive procedure that takes approximately 10–30 minutes to perform. During the procedure, appropriate implants of various types and sizes are inserted into the tarsal sinus to reduce excessive foot pronation. Studies have shown that the procedure is beneficial to the patient, as it positions the foot correctly and children can return to performing physical activities without experiencing pain and/or rapid muscle fatigue in the foot area. The most commonly used measurements to assess the effects of plantar arthrodesis are those calculated from X-rays, such as Meary's angle, calcaneal inclination pitch angle (CP), talocalcaneal angle (Kite's angle), and surveys using The American Orthopaedic Foot and Ankle Society’s (AOFAS’s) ankle and hindfoot scoring system

Wpływ niewielkiego i zaawansowanego niedokrwienia na przepływ w mikrokrążeniu skórnym u pacjentów z miażdżycowym niedokrwieniem kończyn dolnych

Introduction. The aim of the study was to characterize the changes in the microcirculation in patients with varying severity of atherosclerotic ischaemia of the lower limbs (PAOD). Material and methods. The study included 27 healthy subjects, 79 patients with PAOD category 0 and 1 according to the Rutherford classification, and 137 patients with PAOD category 3 and 4. The study evaluated cutaneous blood flow, flowmotion bonds, percutaneous partial pressure of oxygen and flow-mediated vasodilation. Results. Even mild PAOD exhibits a worse systemic vascular function expressed as a reduction in the scope of flow-mediated vasodilation, and locally in TcpO2 decrease. Increase in local changes in advanced forms of PAOD were observed as further reduction in TcpO2 and a drastic reduction or exhaustion of the functional microcirculatory reserve. Among the evaluated risk factors for atherosclerosis only diabetes and smoking significantly modified perfusion, which resulted in a significant decrease in the values of vasodilation and TcpO2. Conclusions. The study revealed the occurrence of adverse changes in microcirculation, also in patients with poorly discernible signs of limb ischaemia. It can be assumed that these may also occur in the patients who underwent a haemodynamically effective revascularization.Wstęp. Celem badań było scharakteryzowanie zmian w mikrokrążeniu u pacjentów z różnym stopniem zaawansowania miażdżycowego niedokrwienia kończyn dolnych (PAOD). Materiał i metody. Do badania włączono 27 zdrowych osób, 79 pacjentów z PAOD w 0 i 1 kategorii oraz 137 pacjentów z PAOD w 3 i 4 kategorii według klasyfikacji Rutherforda. Oceniano skórny przepływ krwi, pasma flowmotion, przezskórne ciśnienie parcjalne tlenu i wazodylatację indukowaną przepływem. Wyniki. Już w łagodnej postaci PAOD występuje ogólnoustrojowe pogorszenie funkcji naczyń, wyrażone zmniejszeniem zakresu wazodylatacji indukowanej przepływem, a miejscowo zmniejszeniem TcpO2. W zaawansowanych postaciach PAOD obserwowano pogłębienie zmian miejscowych w postaci dalszego obniże­nia TcpO2 i radykalnego zmniejszenia lub też wyczerpania rezerwy czynnościowej mikrokrążenia. Spośród ocenianych czynników ryzyka rozwoju miażdżycy tylko cukrzyca i palenie tytoniu znamiennie modyfikowały perfuzję, istotnie zmniejszając wartości wazodylatacji i TcpO2. Wnioski. W przeprowadzonym badaniu wykazano występowanie niekorzystnych zmian w mikrokrążeniu także u pacjentów ze słabo zaznaczonymi objawami niedokrwienia kończyn. Można przypuszczać, że mogą one występować również u pacjentów po skutecznych hemodynamicznie zabiegach rewaskularyzacji

Correlation tensor criteria for genuine multiqubit entanglement

We present a development of a geometric approach to entanglement indicators. The method is applied to detect genuine multiqubit entanglement. The criteria are given in form of non-linear conditions imposed on correlation tensors. Thus they involve directly observable quantities, and in some cases require only few specific measurements to find multiqubit entanglement. The non-linearity of each of the criteria allows detection of entanglement in wide classes of states. In contrast to entanglement witnesses, which in the space of Hermitian operators define a hyperplane, the new conditions define a geometric figure encapsulating the non-fully entangled states within it.Comment: 8 pages, 1 figure, journal versio