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1
Chen, Di Lai, Jian Xin Liu, Kai Jun Du, and Yan Wang. "Analysis of the Deterioration of Harmonic Local Irregularity on Locomotive Wheel-Rail Vertical Force." Applied Mechanics and Materials 684 (October 2014): 137–44. http://dx.doi.org/10.4028/www.scientific.net/amm.684.137.
Повний текст джерелаАнотація:
By the MATLAB software the article simulated the local irregularity, the new harmonic excitation superimposed on the initial harmonic to simulate track settlement deterioration, the new uplift excitation superimposed on the initial harmonic to simulate track raised deterioration, as the locomotive model external excitation, using the SIMPACK multi-body dynamics simulation software to analyze the influences of the deterioration of harmonic local irregularity on locomotive wheel-rail vertical force, on the basis of the locomotive wheel-rail interaction dynamics index by the locomotive vehicle dynamics theory. The simulation results show that when the deterioration of harmonic local irregularity occurs, even if the amplitude of deterioration is small, which will cause serious deterioration of wheel-rail dynamic response and strong shock and vibration of wheel-rail .The larger amplitude of harmonic local irregularity, the greater of the maximum wheel-rail vertical force. When deterioration of the amplitude exceeds a certain value, the maximum of the wheel-rail vertical force exceedes the limit, which will cause derailment. The wheel-rail dynamic interaction increases with the speed increasing. At the same speed (such as 120km/h), harmonic local irregularity settlement deterioration compareing to harmonic local irregularity raised deterioration, the maximum of the wheel-rail vertical force increases 14.4%. Therefore, local irregularity deterioration or the speed of the locomotive should be strictly controlled.
2
Meers, J. M., J. L. Bower, and C. A. Alfano. "1090 Self-Reported Sleep Quality is a Robust Predictor of Depression in Women With Irregular Menstrual Cycles." Sleep 43, Supplement_1 (April 2020): A415. http://dx.doi.org/10.1093/sleep/zsaa056.1085.
Повний текст джерелаАнотація:
Abstract Introduction Menstrual cycle regularity is an important marker of women’s health. Abnormalities are associated with serious health complaints, e.g., infertility, cardiovascular, and metabolic disorders. Cycle irregularity is also linked to depression, anxiety and poor quality sleep. In fact, poor sleep and circadian misalignment may precede menstrual irregularity for some. This study describes sleep and affective characteristics of women with menstrual cycle irregularity compared to regularly cycling women and examined the individual contributions of sleep and menstrual regularity to affective symptoms. Methods N=314 (Mage=20.95, SD=2.35) women provided reports of menstrual health characteristics (frequency, duration, related symptoms), sleep over the past month (Pittsburgh Sleep Quality Index; PSQI) and on the previous night, as well as mood (Center for Epidemiologic Studies Depression Scale) and anxiety (State Trait Anxiety Inventory) symptoms. Results Among the 20.4% (n=64) of women who endorsed “always irregular” periods, mean cycle length (m=31.33 days, sd=8.5) was significantly greater than among women more regular periods (m= 27.93, sd=3.83, t(55.37)=-2.78, p=.007). This subgroup also reported higher PSQI scores (t(181)=-2.56, p=.011), longer SOL (t(282)=-3.00, p=.003), poorer sleep quality overall (t(299)=-2.35, p=.02), and poorer sleep quality on the previous night (t(300)=2.70, p=.007). Irregular cyclers reported significantly more depressive (t(284)=-2.18, p=.03) but not anxiety symptoms. When sleep and menstrual irregularity were entered into a hierarchical linear regression to examine their relative influence on depressive symptoms (F[2,174]=13.15, p<.001, R2=.13), sleep remained the only significant predictor (b= 1.13, p <.001) and menstrual cycle effects were no longer significant. Conclusion In line with previous studies, cycle irregularity was associated with poorer sleep quality and depressive symptoms. Sleep quality was found to be a more robust predictor of depression than menstrual cycle irregularity, suggesting that sleep may underlie the affective disturbances in women with more irregular menstrual cycles. Support n/a
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Khan, Suliman, Pengfei Duan, Lunguang Yao, and Hongwei Hou. "Shiftwork-Mediated Disruptions of Circadian Rhythms and Sleep Homeostasis Cause Serious Health Problems." International Journal of Genomics 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/8576890.
Повний текст джерелаАнотація:
Shiftwork became common during the last few decades with the growing demands of human life. Despite the social inactivity and irregularity in habits, working in continuous irregular shifts causes serious health issues including sleep disorders, psychiatric disorders, cancer, and metabolic disorders. These health problems arise due to the disruption in circadian clock system, which is associated with alterations in genetic expressions. Alteration in clock controlling genes further affects genes linked with disorders including major depression disorder, bipolar disorder, phase delay and phase advance sleep syndromes, breast cancer, and colon cancer. A diverse research work is needed focusing on broad spectrum changes caused by jet lag in brain and neuronal system. This review is an attempt to motivate the researchers to conduct advanced studies in this area to identify the risk factors and mechanisms. Its goal is extended to make the shift workers aware about the risks associated with shiftwork.
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Rungraengwajiake, Sarawoot, and Pornchai Supnithi. "3-D Ionospheric Plasma Bubble Model for Ground-Based Augmentation System." Applied Mechanics and Materials 781 (August 2015): 102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.781.102.
Повний текст джерелаАнотація:
The ground-based augmentation system (GBAS) is now an important system for assisting the global navigation satellite system (GNSS) based aircraft navigation during landing phases. Since the ionospheric irregularity is one of the most serious problem in the high-precision GBAS, the impacts of ionospheric irregularities to GBAS in many countries need to be studied before actual installation and operation. However, most of previous studies are based on the rare ionospheric storm events observed in US in the mid-latitude region. For Thailand, which is located in equatorial and low-latitude region, the ionospheric irregularity known as plasma bubble is a common phenomenon after sunset, considered to have adverse impact to the integrity of GBAS operation. In this paper, we propose a simple 3-D ionospheric plasma bubble model for studying its impacts on GBAS operation in Thailand. The background electron density generated by the NeQuick2 model combined with the rectangular depletion are used in the near real-time simulation.
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Zhai, Mingda, Zhiqiang Long, and Xiaolong Li. "A New Strategy for Improving the Tracking Performance of Magnetic Levitation System in Maglev Train." Symmetry 11, no. 8 (August 16, 2019): 1053. http://dx.doi.org/10.3390/sym11081053.
Повний текст джерелаАнотація:
The maglev train is a whole new method of transportation without wheels, consisting of 20 groups of symmetry suspension units. The magnetic levitation system plays a major role in suspending the maglev train stably and following the track quickly with the desired gap. However, vertical track irregularity in the maglev train line has a dreadful effect on the tracking performance of the magnetic levitation system. The investigations carried out by our team have revealed that the fluctuation of the suspension gap becomes more and more serious with increases in running speed. In this paper, a mathematical model with consideration of vertical track irregularity is established. In order to overcome and suppress the fluctuation of the suspension gap, we propose a new strategy which includes installing an accelerometer on the electromagnet to address this problem. This strategy has already been successfully implemented and applied to the suspension controller for a magnetic levitation system in the Changsha maglev express. Real operation data indicates the tracking performance of the magnetic levitation system was obviously improved.
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Yu, Wenwei, Keigo Nakahata, Guang Hao Sun, Akio Namiki, Sayuri Suwa, Mayuko Tsujimura, Le Xie, Jinwu Wang, and Shao Ying Huang. "Efficient Active Sensing with Categorized Further Explorations for a Home Behavior-Monitoring Robot." Journal of Healthcare Engineering 2017 (2017): 1–16. http://dx.doi.org/10.1155/2017/6952695.
Повний текст джерелаАнотація:
Mobile robotics is a potential solution to home behavior monitoring for the elderly. For a mobile robot in the real world, there are several types of uncertainties for its perceptions, such as the ambiguity between a target object and the surrounding objects and occlusions by furniture. The problem could be more serious for a home behavior-monitoring system, which aims to accurately recognize the activity of a target person, in spite of these uncertainties. It detects irregularities and categorizes situations requiring further explorations, which strategically maximize the information needed for activity recognition while minimizing the costs. Two schemes of active sensing, based on two irregularity detections, namely, heuristic-based and template-matching-based irregularity detections, were implemented and examined for body contour-based activity recognition. Their time cost and accuracy in activity recognition were evaluated through experiments in both a controlled scenario and a home living scenario. Experiment results showed that the categorized further explorations guided the robot system to sense the target person actively. As a result, with the proposed approach, the robot system has achieved higher accuracy of activity recognition.
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Srivastava, Pankaj, Neeraja Sharma, and C. S. Aparna. "Fuzzy Soft System and Arrhythmia Classification." Chinese Journal of Mathematics 2014 (February 18, 2014): 1–12. http://dx.doi.org/10.1155/2014/164781.
Повний текст джерелаАнотація:
An arrhythmia is an irregularity with the speed or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. Most arrhythmias are harmless, but some can be serious or even life threatening. The present paper deals with the classification scheme of arrhythmia commonly occurring in human beings of Southeast Asian countries. Medical knowledge used in practice has been closely studied for modelling user friendly referral system to sharpen arrhythmia diagnosis by experts and this system is tested with satisfactory factor which is measured with degree of match criterion under the domain of considered inputs and computed output.
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SADOVEI, Nicolae, and Mihail CEBOTARI. "Accesul lucrătorilor migranți cu statut iregular fără forme la dreptul la muncă." Analele Universitării din București Drept 2021, no. 2021 (July 2, 2021): 112–23. http://dx.doi.org/10.31178/aubd.2021.08.
Повний текст джерелаАнотація:
International labor migration flows include a significant number of migrant workers who for specific reasons infringe residence rules in destination countries. These persons are considered to be the most vulnerable category of migrants, being prone to serious violations of their fundamental rights. States of destination have practically universally adopted policies to restrict and control irregular migration. In this context, the objective of this article is to establish the possibility for irregular migrant workers to benefit from the rights and results of their work, and to establish the limits and prohibitions that arise in the event of irregularity. The article examines both the international instruments and practice as well as regional and national approaches used by states in this field.
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Morsy, A. M., H. H. Zaher, M. H. Hassan, and A. Shouman. "Predictors of treatment failure among tuberculosis patients under DOTS strategy in Egypt." Eastern Mediterranean Health Journal 9, no. 4 (September 21, 2003): 689–701. http://dx.doi.org/10.26719/2003.9.4.618.
Повний текст джерелаАнотація:
Treatment failure is a serious problem facing some national tuberculosis [TB] control programmes. Irregularity of treatment is a factor that can lead to treatment failure. A case-control study was carried out in TB centres in Egypt during April 2001-December 2002 aimed at investigating the predictors of treatment failure. We interviewed 119 people with treatment failure and an equal number of cured cases [controls] and their families regarding sociodemographic characteristics, information about TB, information about drugs, treatment compliance, family support and patient-family interaction. Significant risk factors for treatment failure were non-compliance to treatment, deficient health education to the patient, poor patient knowledge regarding the disease and diabetes mellitus as co-morbid condition
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Sharma, Pranav, Puneet Kochar, Salil Sharma, and Eran Rotem. "Spontaneous Retroperitoneal Hemorrhage - A Rare Presentation of Polyarteritis Nodosa: Role of Angiography in Diagnosis and Management." American Journal of Interventional Radiology 3 (February 20, 2019): 2. http://dx.doi.org/10.25259/ajir-56-2018.
Повний текст джерелаАнотація:
Spontaneous retroperitoneal hemorrhage (RPH) is a rare but serious complication of polyarteritis nodosa (PAN) and must be considered in patients presenting with RPH as their first presentation. Renal infarctions, liver infarctions, and ruptured microaneurysms are all complications of PAN. We present two cases presenting with abdominal and back pain. The first patient’s abdominal computed tomography (CT) scan revealed fractured right kidney with retroperitoneal pericapsular hematoma and multiple hepatic and splenic infarcts. The digital subtraction angiography (DSA) demonstrated large areas of devascularization of the right kidney and right renal arterial wall irregularity with multifocal areas of stenosis, dilatations, and microaneurysms without active extravasation of IV contrast. She was treated conservatively and started on a pulsed dose of steroids and cyclophosphamide. The second patient’s abdominal CT angiography revealed multiple visceral aneurysms and focal areas of stenosis in branches of celiac axis and superior mesentery artery without active contrast extravasation. The DSA demonstrated multifocal areas of irregularity and narrowing in celiac and intrahepatic arteries as well as a 9 mm pseudoaneurysm in the inferior pancreaticoduodenal artery which was embolized with metallic coils. PAN has a vague clinical presentation and is clinically occult. Patients may be diagnosed while getting investigated for some other causes of abdominal pain. The emergency physician and the radiologist should be aware of the findings and should be able to correlate with pathology to prevent life-threatening complications. Angiography plays a crucial role, not only in diagnosis but also in appropriate management.
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B V, Mahendra, and Kavitha R S. "A Review on COVID19: Evolution, Structure of Corona Virus and Comparison of COVID19 with Common FLU." Shanlax International Journal of Arts, Science and Humanities 8, S1-Feb (February 6, 2021): 54–59. http://dx.doi.org/10.34293/sijash.v8is1-feb.3931.
Повний текст джерелаАнотація:
Covid-19 is a pandemic disease that threatened the World both socially and economically. The virus originated from Wuhan – China in December 2019. Globally 18,354,342 cases were reported and total mortality cases are 6,96,147 till Aug 5 2020. The spreading of Novel Covid19 is faster than MARS and SARS Virus. The symptoms are very similar to the common cold or flu such as running nose sneezing, sore throat are the common symptoms and difficulty in breathing, severe muscle ache, dry cough GIT irregularity were the serious symptoms. The infection may leads to pneumonia, Acute Respiratory disorder (ARD) Syndrome. The incubation period varies from 7- 14 days. The transmission occurs through physical contact with infected person, infected droplets and contaminated objects. Laboratory test includes CT scan, Nasal Oral pharyngeal swab tests, RT PCR were employed for diagnosis. The disease at the end of August showed increasing mortality rate. Maintaining Physical distance is the only measure to overcome the infection.
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PLESCHENKO, Alexander. "INFLUENCE OF TECHNICAL PROGRESS AND ACCELERATION OF INFORMATIZATION ON SOCIO-CULTURAL LANDSCAPES." PRIMO ASPECTU, no. 1(41) (March 27, 2020): 7–11. http://dx.doi.org/10.35211/2500-2635-2020-1-41-7-11.
Повний текст джерелаАнотація:
The article discusses how the spread and acceleration of technology, communication, informatization affects the social perception of reality by the population of the studied landscape, how does a spatial understanding of reality take place in the sociocultural landscape. The study characterizes the aspect of the impact of accelerating the receipt of information in the framework of technological progress, which sees one of the serious causes of social changes, the unevenness of cultural transformations of the sociocultural landscape and the emergence, alienation, simulacra, clip culture, hyperreality due to the massive spread of clip culture. The concept of “landscape” is argued as the term that is best suited for the study of global processes, that the semantics of the English language conveys the idea of mobility and irregularity, in the term (landscape) the suffix - “scape” means “to slip, topple, to avoid”, then which is dynamic in space. It is emphasized that fast media flows in sociocultural landscapes dictate the creation of new methodological approaches.
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Bharali, B., and U. K. Misra. "Investigation of Flood Routing Using Variable Parameter Kinematic Wave Model (VPKWM) for Non-Prismatic Natural Channel in an Ungauged Basin." Journal of Applied Engineering Sciences 10, no. 2 (December 1, 2020): 111–18. http://dx.doi.org/10.2478/jaes-2020-0017.
Повний текст джерелаАнотація:
AbstractThis research concerns about the development and application of Variable Parameter Kinematic Wave Numerical model (VPKWM) based on 1-D Saint-Venant equation, to study the behaviour of the propagation of a flood wave in Non-prismatic natural waterways in an ungauged basin. The channel slope and wetted perimeter are considered as variable because of the irregularity of the boundary of the channel and the change in magnitude of discharge. The scarcity of reliable inflow data at upstream is a serious problem for the flood routing process in an ungauged basin. In this study the inflow hydrograph and lateral inflow hydrographs are obtained using SCS-CN method as rainfall runoff model. The performance of the model assessed considering four parameters such as root mean square error (RMSE), peak discharge, peak time and total volume. The results indicated that the VPKWM for non-prismatic channel provided reasonable output compared with the observed data.
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Lee, Jong Il. "A study on public personnel management system in the later period of the Lee Dynasty." Korean Journal of Policy Studies 1 (December 31, 1986): 171–80. http://dx.doi.org/10.52372/kjps01013.
Повний текст джерелаАнотація:
In the later period of the Lee Dynasty, the public personel administration ran completely out of the established principle. The most serious irregularity may be about the transfer of high rank officials: Many high rank officials experienced the transfer of their positions 40 times within 3 years in average, meaning that each official was transferred in one month or two. No wonder they could not understand the contents of their new jobs. Thus, they had no other way than to rely on lower-level bureaucrats, since these bureaucrats remained almost permanently in their positions. Moreover, the rank system itself was much hurted the practice that many high-rank officials in symbolic higher-level positions preferred important lower-level positions. This practice gave a severe blow to the class system of the dynasty: one's official rank was no more matched with his social status. All these were parts of factors which caused the slow destruction of the noble class in the later period of the Lee Dynasty.
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Zhou, Chunshan, Shijie Li, and Shaojian Wang. "Examining the Impacts of Urban Form on Air Pollution in Developing Countries: A Case Study of China’s Megacities." International Journal of Environmental Research and Public Health 15, no. 8 (July 24, 2018): 1565. http://dx.doi.org/10.3390/ijerph15081565.
Повний текст джерелаАнотація:
Urban form is increasingly being identified as an important determinant of air pollution in developed countries. However, the effect of urban form on air pollution in developing countries has not been adequately addressed in the literature to date, which points to an evident omission in current literature. In order to fill this gap, this study was designed to estimate the impacts of urban form on air pollution for a panel made up of China’s five most rapidly developing megacities (Beijing, Tianjin, Shanghai, Chongqing, and Guangzhou) using time series data from 2000 to 2012. Using the official Air Pollution Index (API) data, this study developed three quantitative indicators: mean air pollution index (MAPI), air pollution ratio (APR), and continuous air pollution ratio (CAPR), to evaluate air pollution levels. Moreover, seven landscape metrics were calculated for the assessment of urban form based on three aspects (urban size, urban shape irregularity, and urban fragmentation) using remote sensing data. Panel data models were subsequently employed to quantify the links between urban form and air pollution. The empirical results demonstrate that urban expansion surprisingly helps to reduce air pollution. The substitution of clean energy for dirty energy that results from urbanization in China offers a possible explanation for this finding. Furthermore, urban shape irregularity positively correlated with the number of days with polluted air conditions, a result could be explained in terms of the influence of urban geometry on traffic congestion in Chinese cities. In addition, a negative association was identified between urban fragmentation and the number of continuous days of air pollution, indicating that polycentric urban forms should be adopted in order to shorten continuous pollution processes. If serious about achieving the meaningful alleviation of air pollution, decision makers and urban planners should take urban form into account when developing sustainable cities in developing countries like China.
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Manan, T., and K. Prasanna. "Review of Early Impact of COVID-19 on Indian Agricultural Economy and Disturbances in Food Supply Chains." CARDIOMETRY, no. 23 (August 20, 2022): 201–6. http://dx.doi.org/10.18137/cardiometry.2022.23.201206.
Повний текст джерелаАнотація:
Many economists believe that COVID-19 poses a serious existential crisis for Indian rural communities. Analysis of the performance of the agriculture sector in the last few months reveals that agriculture and allied sectors can give new momentum to the Indian economy. A food crisis is not possible in India. We produce 70 million tonnes of food grain, more than the total national requirement. In the coming Kharif season, the input costs are expected to be higher than usual, but the government of India’s response to mitigate high input costs is encouraging. The major problem is in the food supply chain, which needed serious intervention from stakeholders and state and central government support. Disturbances and disruption in food supply chains have created high transaction costs. The spread of COVID-19 may create irregularity in food supply throughout India as 92% of produce is purchased and consumed. Using trade statistics and survey data gathered through online questionnaires and phone interviews with small-holder farmers, agro-industrial companies, agricultural workers, traders, importers, and consumers. Our findings show significant differences in how COVID-19 and containment measures disrupt supply chains between the modern export-oriented supply chain, which is centered on a few large vertically integrated agro-industrial companies, and the more traditional domestic-oriented supply chain, which includes a large number of small-holder farmers and informal traders — with the former being more resilient to the COVID-19.
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Tamburaci, Esra, and Özer Birge. "Does female genital mutilation/cutting have any effect on normal birth?" International Journal of Reproduction, Contraception, Obstetrics and Gynecology 10, no. 12 (November 25, 2021): 4357. http://dx.doi.org/10.18203/2320-1770.ijrcog20214628.
Повний текст джерелаАнотація:
Background: World Health Organization’s (WHO) defines female genital mutilation (FGM) as all procedures involving the total or partial removal of female external genitalia without any medical reasons. It is estimated that about 100 million women worldwide are circumcised. After circumcision compications such as bleeding, infection, shock, menstrual irregularity, dysuria, frequent urinary tract infections, pelvic pain and difficulty in sexual intercourse occur with varying frequencies.Methods: In this article, we aimed to discuss normal vaginal delivery results of 45 term pregnant cases with 3 types of female genital multilation/circumcision. We know that the vaginal entrance is closed as a result of adhesions in the genital area due to circumcision and secondary complications may develop.Results: The mean age of 45 patients included in the study was 26.2±8.78 years. Considering the postpartum complications, bilateral labial tissue ruptures in 15 cases, followed by vaginal hematoma in 9 cases, anal sphincter damage in 11 cases, deep episiotomy tears in 8 cases, periurethral tears in 8 cases, deep cervical tears in 8 cases, vulvar epidermoid cyst ruptures in 4 cases and 4 cases. perineal body ruptures were seen in 4 cases, vulvar hematoma in 4 cases, and vaginal mucosal damage in 9 cases.Conclusions: It has been shown once again that FGM/C is a method that completely changes the female vaginal anatomy and has very serious delivery complications. It is obvious that serious educations and studies need to be done in the countries where this method is applied.
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Anokhin, Anatoly A., Ksenia D. Shelest, and Marina A. Tikhonova. "Trends in population change and the sustainable socio-economic development of cities in North-West Russia." Baltic Region 11, no. 4 (December 2019): 36–57. http://dx.doi.org/10.5922/2079-8555-2019-4-3.
Повний текст джерелаАнотація:
The Northwestern Federal District is a Russian macro-region that is a unique example of a model region. It accounts for 10 % of the country’s total area and 9.5 % of its population. This article aims to trace the patterns of city distribution across the region, to assess the conditions of differently populated cities and towns, and to identify sustainability trends in their socio-economic development. Population change is a reliable indicator of the competitiveness of a city. As a rule, a growing city performs well economically and has a favourable investment climate and high-paid jobs. The analysis revealed that population change occurred at different rates across the federal district in 2002—2017. A result of uneven socio-economic development, this irregularity became more serious as globalisation and open market advanced. The study links the causes and features of growth-related differences to the administrative status, location, and economic specialisation of northwestern cities. The migration behaviour of the population and the geoeconomic position are shown to be the main indicators of the sustainable development of a city.
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Anokhin, Anatoly A., Ksenia D. Shelest, and Marina A. Tikhonova. "Trends in population change and the sustainable socio-economic development of cities in North-West Russia." Baltic Region 11, no. 4 (2019): 36–57. http://dx.doi.org/10.5922/10.5922/2079-8555-2019-4-3.
Повний текст джерелаАнотація:
The Northwestern Federal District is a Russian macro-region that is a unique example of a model region. It accounts for 10 % of the country’s total area and 9.5 % of its population. This article aims to trace the patterns of city distribution across the region, to assess the conditions of differently populated cities and towns, and to identify sustainability trends in their socio-economic development. Population change is a reliable indicator of the competitiveness of a city. As a rule, a growing city performs well economically and has a favourable investment climate and high-paid jobs. The analysis revealed that population change occurred at different rates across the federal district in 2002—2017. A result of uneven socio-economic development, this irregularity became more serious as globalisation and open market advanced. The study links the causes and features of growth-related differences to the administrative status, location, and economic specialisation of northwestern cities. The migration behaviour of the population and the geoeconomic position are shown to be the main indicators of the sustainable development of a city.
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Çinar, C., H. Bozkaya, M. Parildar, and I. Oran. "Endovascular Management of Vascular Injury during Transsphenoidal Surgery." Interventional Neuroradiology 19, no. 1 (March 2013): 102–9. http://dx.doi.org/10.1177/159101991301900116.
Повний текст джерелаАнотація:
Vascular injury is an unusual and serious complication of transsphenoidal surgery. We aimed to define the role of angiography and endovascular treatment in patients with vascular injuries occurring during transsphenoidal surgery. During the last ten-year period, we retrospectively evaluated nine patients with vascular injury after transsphenoidal surgery. Eight patients were symptomatic due to vascular injury, while one had only suspicion of vascular injury during surgery. Four patients presented with epistaxis, two with subarachnoid hemorrhage, one with exophthalmos, and one with hemiparesia. Emergency angiography revealed a pseudoaneurysm in four patients, contrast extravasation in two, vessel dissection in one, vessel wall irregularity in one, and arteriovenous fistula in one. All patients but one were treated successfully with parent artery occlusion, with one covered stent implantation, one stent-assisted coiling method, while one patient was managed conservatively. One patient died due to complications related to the primary insult without rebleeding. Vascular injuries suspected intra or postoperatively must be investigated rapidly after transsphenoidal surgery. Endovascular treatment with parent artery occlusion is feasible with acceptable morbidity and mortality rates in the treatment of vascular injuries occurring in transsphenoidal surgery.
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Domino, Małgorzata, Marta Borowska, Łukasz Zdrojkowski, Tomasz Jasiński, Urszula Sikorska, Michał Skibniewski, and Małgorzata Maśko. "Application of the Two-Dimensional Entropy Measures in the Infrared Thermography-Based Detection of Rider: Horse Bodyweight Ratio in Horseback Riding." Sensors 22, no. 16 (August 13, 2022): 6052. http://dx.doi.org/10.3390/s22166052.
Повний текст джерелаАнотація:
As obesity is a serious problem in the human population, overloading of the horse’s thoracolumbar region often affects sport and school horses. The advances in using infrared thermography (IRT) to assess the horse’s back overload will shortly integrate the IRT-based rider-horse fit into everyday equine practice. This study aimed to evaluate the applicability of entropy measures to select the most informative measures and color components, and the accuracy of rider:horse bodyweight ratio detection. Twelve horses were ridden by each of the six riders assigned to the light, moderate, and heavy groups. Thermal images were taken pre- and post-exercise. For each thermal image, two-dimensional sample (SampEn), fuzzy (FuzzEn), permutation (PermEn), dispersion (DispEn), and distribution (DistEn) entropies were measured in the withers and the thoracic spine areas. Among 40 returned measures, 30 entropy measures were exercise-dependent, whereas 8 entropy measures were bodyweight ratio-dependent. Moreover, three entropy measures demonstrated similarities to entropy-related gray level co-occurrence matrix (GLCM) texture features, confirming the higher irregularity and complexity of thermal image texture when horses worked under heavy riders. An application of DispEn to red color components enables identification of the light and heavy rider groups with higher accuracy than the previously used entropy-related GLCM texture features.
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Li, Xianjia, Zhi Li, Rui Zhou, Bin Wang, Yu Wang, Husheng Li, Tao He, et al. "Improvement of Structures and Properties of Al2O3 Coating Prepared by Cathode Plasma Electrolytic Deposition by Incorporating SiC Nanoparticles." Coatings 12, no. 5 (April 24, 2022): 580. http://dx.doi.org/10.3390/coatings12050580.
Повний текст джерелаАнотація:
A serious issue in the preparation of Al2O3 coatings by cathode plasma electrolytic deposition (CPED) is that the coatings have a porous structure, which is detrimental to their protective performance. Therefore, to address this problem, SiC nanoparticles are incorporated into the Al2O3 coating in this study. A series of Al2O3–SiC composite coatings are efficaciously prepared on the surface of 316L stainless steel by CPED. The microstructures, compositions and phase components of the composite coatings are characterized; the electrochemical corrosion resistance and tribological behavior are evaluated; and the mechanism of SiC nanoparticles in the coating formation process is discussed in detail. The results indicate that the Al2O3 coating prepared by CPED consists of α-Al2O3 and γ-Al2O3, and the former is the main crystalline phase. With the incorporation of SiC nanoparticles in the coating, the content of α-Al2O3 gradually decreases, almost disappearing, accompanied by an increase in γ-Al2O3 as the main crystalline phase. The incorporation of SiC nanoparticles significantly reduces the surface irregularity and roughness of Al2O3 coatings and remarkably improves the corrosion resistance and wear resistance of the Al2O3 coatings. The improvement in corrosion resistance and anti-wear properties can be explained by the fact that the SiC nanoparticles effectively weaken electrical breakdown and increase the compactness of the coatings.
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Li, Xianjia, Zhi Li, Rui Zhou, Bin Wang, Yu Wang, Husheng Li, Tao He, et al. "Improvement of Structures and Properties of Al2O3 Coating Prepared by Cathode Plasma Electrolytic Deposition by Incorporating SiC Nanoparticles." Coatings 12, no. 5 (April 24, 2022): 580. http://dx.doi.org/10.3390/coatings12050580.
Повний текст джерелаАнотація:
A serious issue in the preparation of Al2O3 coatings by cathode plasma electrolytic deposition (CPED) is that the coatings have a porous structure, which is detrimental to their protective performance. Therefore, to address this problem, SiC nanoparticles are incorporated into the Al2O3 coating in this study. A series of Al2O3–SiC composite coatings are efficaciously prepared on the surface of 316L stainless steel by CPED. The microstructures, compositions and phase components of the composite coatings are characterized; the electrochemical corrosion resistance and tribological behavior are evaluated; and the mechanism of SiC nanoparticles in the coating formation process is discussed in detail. The results indicate that the Al2O3 coating prepared by CPED consists of α-Al2O3 and γ-Al2O3, and the former is the main crystalline phase. With the incorporation of SiC nanoparticles in the coating, the content of α-Al2O3 gradually decreases, almost disappearing, accompanied by an increase in γ-Al2O3 as the main crystalline phase. The incorporation of SiC nanoparticles significantly reduces the surface irregularity and roughness of Al2O3 coatings and remarkably improves the corrosion resistance and wear resistance of the Al2O3 coatings. The improvement in corrosion resistance and anti-wear properties can be explained by the fact that the SiC nanoparticles effectively weaken electrical breakdown and increase the compactness of the coatings.
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Kale, Vedant. "Study of Structural Irregularities in different Seismic Zones using Response Spectrum Analysis." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (August 31, 2021): 1410–17. http://dx.doi.org/10.22214/ijraset.2021.37082.
Повний текст джерелаАнотація:
Abstract: The Indian Standard code IS-1893: 2002 (Part-I) defines various types of structural irregularities. The code suggests a special approach of study for irregular structures. The earthquake effect leads to the damage the property and many people loss their life. So, we've to understand the structural performance under seismic load before construction. In this study varying plan irregularities which are often inevitable thanks to building requirements and architectural imperatives, and having a serious impact on building costs are investigated. The objective of the project is to carry out Response spectrum analysis of two RCC buildings is to be done in four different seismic zones of India (i.e., Zone-2, Zone-3, Zone-4, Zone-5). ETABS model of G+10 RCC with Varying Geometry plan is considered in this analysis. The analysis is done using Extended Three-Dimensional Analysis of Building System software. Various response parameters like lateral force, story drift, Displacement are often determined. The evaluation of response of structures subjected to lateral loading with the help of frequency and the magnitude of stress resultant, is also included in the scope of this paper. Keywords: Plan irregularity, Vertical geometric irregularities Response spectrum method, ETABS, Structural Irregularities, Lateral Loading, Non-Linear Analysis, Storey Drift, Storey Displacement.
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J. Hamood, Mohammed, Layla A. Ghalib, and Ameer G. Abdalwahab. "Numerical Evaluation of Seismic Response of Asymmetrical Reinforced Concrete Frame Buildings." International Journal of Engineering & Technology 7, no. 4.20 (November 28, 2018): 491. http://dx.doi.org/10.14419/ijet.v7i4.20.26249.
Повний текст джерелаАнотація:
Asymmetrical multi-storey buildings are almost unavoidable in modern structures due to various types of useful and architectural requirements. Latest earthquakes showed that irregular distribution of mass, stiffness and strength cause serious damage in building structural systems. This paper investigates the numerical simulation of buildings with plan irregularity and presents a case study to demonstrate the numerical evaluation of the seismic response of a three real plan-asymmetric reinforced concrete building tested at full scale at the European Laboratory for Structural Assessment of the Joint Research Center, Ispra / Italy within the SPEAR project. The structural evaluation performed through a validated Finite Elements Package, modeled by the general purpose ABAQUS, which is able to run accurate analysis, in particular nonlinear static and dynamic analysis considering both geometric nonlinearity and material inelasticity.Adequacy of the numerical modeling is verified by comparing numerical and experimental results through evaluation of the seismic capacity and dynamic characteristics of the building. The provisions of the adopted seismic code for designing such buildings are also checked over and done with the nonlinear static and dynamic analysis by verifying the proficiency of an analytical model for simulating the nonlinear response of structures considered to conduct an investigation into experiments.
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Rahul Singhal. "Enhancing Health Monitoring using Efficient Hyperparameter Optimization." December 2022 4, no. 4 (November 29, 2022): 274–89. http://dx.doi.org/10.36548/jaicn.2022.4.004.
Повний текст джерелаАнотація:
Nowadays, healthcare problems among elders have been increasing at an unprecedented rate, and every year, more than a quarter of the elderly people face weakening injuries such as unexpected falls, etc. resulting in broken bones and serious injuries in some cases. Sometimes, these injuries may go unnoticed, and the resulting health consequences can have a considerable negative impact on their quality of life. Constant surveillance by trained professionals is impossible owing to the expense and effort. The detection of physical activities by different sensors and recognition processes is a key topic of research in wireless systems, smartphones and mobile computing. Sensors document and keep track of the patient's movements, to report immediately when any irregularity is found, thus saving a variety of resources. Multiple types of sensors and devices are needed for activity identification of a person's various behaviours that record or sense human actions. This work intends to gather relevant insights from data gathered from sensors and use it to categorize various human actions with machine learning using appropriate feature selection and hyperparameter tuning, and then compare the implemented models based on their performance. Understanding human behaviour is very useful in the healthcare industry, particularly in the areas of rehabilitation, elder care assistance, and cognitive impairment.
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Sitnov, Alexandr, and Sergey O. Ageev. "Mathematical model and algorithmic process of solving the problem of the intra-day regulation of discharge of water through the Nizhny Novgorod low-pressure hydroelectric complex." Russian Journal of Water Transport, no. 66 (March 23, 2021): 153–64. http://dx.doi.org/10.37890/jwt.vi66.153.
Повний текст джерелаАнотація:
Introduction of measures for intra-day of regulating runoff incoming water flow rates from the Nizhny Novgorod HPP and their discharge through the spillway of the Nizhny Novgorod low-pressure hydroelectric complex requires a specific algorithm for dispatcher actions of the created hydraulic system. At the same time, there are serious difficulties in predicting the water regime over time. As previous studies have shown there is a large unevenness and irregularity of water discharges not only during the same day, but also in the same periods of each day, as well as weeks, months, and years. Тhis article analyzes the boundary conditions when introducing measures of regulating runoff, a mathematical model and an algorithm for solving the problem of intraday regulation are developed, describing the sequence of actions for solving the problem of "smoothing" the flow rates supplied to the lower stream of the Nizhny Novgorod low-pressure hydroelectric complex. The implementation of the proposed measures is carried out according to a three-stage (or two-stage) schedule for regulating the flow rate and water level. The proposed measures will improve the hydraulic and hydrological conditions of the downstream reach of the Nizhny Novgorod low-pressure hydroelectric complex by which the necessary depths for navigation will be reached. Conditions have also been created to mitigate erosion processes.
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Djemai, Mohamed, and Mhania Guerti. "Kernel SVM Classifiers based on Fractal Analysis for Estimation of Hearing Loss." ENP Engineering Science Journal 2, no. 1 (July 29, 2022): 45–50. http://dx.doi.org/10.53907/enpesj.v2i1.88.
Повний текст джерелаАнотація:
Hearing screening consists of analyzing the hearing capacity of an individual, regardless of age. It identifies serious hearing problems, degree, type and cause of the hearing loss and the needs of the person to propose a solution. Auditory evoked potentials (AEPs) which are detected on the EEG auditory cortex area are very small signals in response to a sound stimulus (or electric) from the inner ear to the primary auditory areas of the brain. AEPs are noninvasive methods used to detect hearing disorders and to estimate hearing thresholds level. In this paper, due to the nonlinear characteristics of EEG, Detrented Fluctuation Analysis (DFA) is used to characterize the irregularity or complexity of EEG signals by calculating the Fractal Dimension (FD) from the recorded AEP signals of the impaired hearing and the normal subjects. This is to estimate their hearing threshold. In order to classify both groups, hearing impaired and normal persons, support vector machine (SVM) is used. For comparably evaluating the performance of SVM classifier, three kernel functions: linear, radial basis function (RBF) and polynomial are employed to distinguish normal and the abnormal hearing subjects. Grid search technique is selected to estimate the optimal kernel parameters. Our results indicate that the RBF kernel SVM classifier is promising; it is able to obtain a high training as well as testing classification accuracy.
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Harippriya Karthikeyan, Remmiya Mary Varghese, and Visalakshi Ramanathan. "Patients Preference to Clear Aligner Therapy Over Conventional Orthodontic Therapy." International Journal of Research in Pharmaceutical Sciences 11, SPL3 (December 28, 2020): 1990–96. http://dx.doi.org/10.26452/ijrps.v11ispl3.3718.
Повний текст джерелаАнотація:
Malocclusion is defined as irregularity of the teeth or a mal-relationship of the dental arches beyond the range of what is accepted as normal occlusion. Maloccluded teeth can cause psychological problems that are related to impaired dentofacial esthetics. Malocclusion may also cause serious problems related to oral health. This is a multifactorial defect caused by factors such as environment, lifestyle, health, genetics, socio-economic status etc. Clear aligners are orthodontic therapeutic options which are preferred for the correction of maloccluded teeth. The main aim of the study was to find out the awareness of the patients towards the preference of clear aligners as orthodontic treatment options. A University based setting was conducted. A sample size of hundred patients was taken for the survey. The survey was done by distributing an online questionnaire through Google forms consisting of 11 questions and circulated among the participants. The participants comprise both male and female patients. To eliminate bias, a randomized sampling method was used. The data was collected over a period of one week. All the 11 questions of the survey were close ended questions. Chi square test was applied to find the association between the parameters and the level of significance. This study shows the patients have a moderate understanding of clear aligners and their acceptance of it as an orthodontic treatment option.
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Khandelwal, Inder, and Dr A. R. Gupta. "Analytical Modelling of T-Shaped Monolithic & Independent RCC Buildings." International Journal for Research in Applied Science and Engineering Technology 10, no. 9 (September 30, 2022): 494–99. http://dx.doi.org/10.22214/ijraset.2022.46651.
Повний текст джерелаАнотація:
Abstract: During an earthquake the behaviour of the building depends on its overall shape, size & geometry. Now a day’s many buildings are asymmetric in plan and elevation because everyone wants to win the race of aesthetically beautiful and complex structures. Due to irregular distribution of mass, stiffness and strength, it may cause serious damage in structural system. There are various types of irregularities in the buildings depending upon their location and scope. Mainly two types of irregularities as per IS – 1893 (Part-1)-2002. are a) plan or horizontal irregularities b) vertical irregularities. Irregularity in structure makes analysis of the seismic behaviour very complicated. The objective of present study is to analyze and compare the behaviour of T shape monolithic and independent RCC structure under seismic loading. The comparison of both structures is studied by calculating, finding and tabulating comparative values of displacement, base moments and shear values. The study reflects that with change in structure i.e. the behaviour of structure towards earthquake changes, nodal displacement, moment, and base shear values shows drastic changes towards resistivity against seismic forces. The soft computing tool and commercial software STAAD-Pro is used for modelling and analysis also the study done over here thus helps to understand effect of earthquake on both structures for achieving stable and safe structure
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Czabanski, Robert, Krzysztof Horoba, Janusz Wrobel, Adam Matonia, Radek Martinek, Tomasz Kupka, Michal Jezewski, Radana Kahankova, Janusz Jezewski, and Jacek Leski. "Detection of Atrial Fibrillation Episodes in Long-Term Heart Rhythm Signals Using a Support Vector Machine." Sensors 20, no. 3 (January 30, 2020): 765. http://dx.doi.org/10.3390/s20030765.
Повний текст джерелаАнотація:
Atrial fibrillation (AF) is a serious heart arrhythmia leading to a significant increase of the risk for occurrence of ischemic stroke. Clinically, the AF episode is recognized in an electrocardiogram. However, detection of asymptomatic AF, which requires a long-term monitoring, is more efficient when based on irregularity of beat-to-beat intervals estimated by the heart rate (HR) features. Automated classification of heartbeats into AF and non-AF by means of the Lagrangian Support Vector Machine has been proposed. The classifier input vector consisted of sixteen features, including four coefficients very sensitive to beat-to-beat heart changes, taken from the fetal heart rate analysis in perinatal medicine. Effectiveness of the proposed classifier has been verified on the MIT-BIH Atrial Fibrillation Database. Designing of the LSVM classifier using very large number of feature vectors requires extreme computational efforts. Therefore, an original approach has been proposed to determine a training set of the smallest possible size that still would guarantee a high quality of AF detection. It enables to obtain satisfactory results using only 1.39% of all heartbeats as the training data. Post-processing stage based on aggregation of classified heartbeats into AF episodes has been applied to provide more reliable information on patient risk. Results obtained during the testing phase showed the sensitivity of 98.94%, positive predictive value of 98.39%, and classification accuracy of 98.86%.
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Barik, Shreya, Abhishek Malakar, Ritu Khatuja, and Pinky S. K. Sahoo. "Knowledge and awareness of emergency contraception among women undergoing medical termination of pregnancy in a tertiary care hospital in Andaman and Nicobar Islands." International Journal of Reproduction, Contraception, Obstetrics and Gynecology 8, no. 10 (September 26, 2019): 3970. http://dx.doi.org/10.18203/2320-1770.ijrcog20194364.
Повний текст джерелаАнотація:
Background: Emergency contraception (EC) is a safe and cost effective measure, which when used judiciously can avoid unintended pregnancies. This is especially relevant in our country where both population control and unsafe abortions are a serious concern. For any contraceptive to be effective, the general population must have a proper knowledge and a positive attitude towards it. Women who come for medical termination of unwanted pregnancy are the best representatives of this and our study aimed to assess the knowledge and awareness of EC in this group.Methods: It was a descriptive, cross-sectional study conducted using a predesigned questionnaire among 100 women who came for medical termination of pregnancy at G. B. Pant Hospital, Port Blair. Questions were asked to evaluate their awareness, knowledge and attitude towards EC.Results: Out of 100 women, only 26 % had heard about EC, mostly from mass media, and seven of these 26 women had correct knowledge of timing of using EC. Four women had used EC before, whereas among others, fear of menstrual irregularity was the major deterrent. A significant association was found between education level and occupation with knowledge of EC.Conclusions: Although EC is a potent tool to avoid unwanted pregnancies, ignorance and misconceptions regarding EC is unfortunately still prevalent among those who would benefit the most from it. Medical personnel and health workers should be more proactive to propagate benefits of EC and encourage its use, as they are usually the first point of contact to the target population.
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Lee, C. R., P. W. Nicholson, R. L. Souhami, and A. A. Deshmukh. "Patient compliance with oral chemotherapy as assessed by a novel electronic technique." Journal of Clinical Oncology 10, no. 6 (June 1992): 1007–13. http://dx.doi.org/10.1200/jco.1992.10.6.1007.
Повний текст джерелаАнотація:
PURPOSE Previous reports have suggested low rates of compliance with the oral component of cancer chemotherapy, which, if confirmed, would have serious implications on treatment. Because of the uncertainties in the methodology used in previous studies, we have assessed compliance with a novel technique. PATIENTS AND METHODS An "intelligent" tablet bottle was used, which, unknown to the patient, electronically records the times of opening over a period of weeks. The records were scored for overall compliance (total number of bottle openings as a percentage of the prescribed number) and for daily and hourly irregularity indices. Twenty-one patients undergoing treatment for Hodgkin's or non-Hodgkin's lymphoma were monitored for a total of 65 treatment periods, each of up to 2 weeks (852 days in total). Eight measures of side effects and quality of life were self-assessed daily by the patients using a diary card. RESULTS The overall compliance was 100.6% +/- 20.6% (mean +/- SD). Overall compliance was lower (mean reduction, 10%) in treatment periods with drugs prescribed to be taken three times a day. It was not possible to demonstrate convincingly any relationship between compliance and any of the following: drug type, monitoring period sequence, the diary card scores of side effects and quality of life, number of relapses, and time since initial diagnosis. CONCLUSION These results are reassuring, but further work is in progress to measure compliance in other treatment regimens in which the side effects are more severe and the prognosis is worse.
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Murhandarwati, Elsa Herdiana, Anis Fuad, Guntur Budi Herwanto, Rizqiani Amalia Kusumasari, Mahardika Agus Wijayanti, and Supargiyono Supargiyono. "Cross -check Digital sebagai Alternatif Uji Banding Pemeriksaan Mikroskopis Malaria secara Manual di Kulon Progo." Jurnal Pengabdian Kepada Masyarakat 4, no. 1 (December 10, 2018): 72. http://dx.doi.org/10.22146/jpkm.33288.
Повний текст джерелаАнотація:
Malaria is an infectious disease in tropical countries including Indonesia which causes serious clinical manifestations and even death. Indonesia Ministry of Health targets that malaria is eliminated from this country by 2030. In Java, malaria is targeted to be eliminated by 2015. However, elimination has not been achieved because some areas, including Kulon Progo, Daerah Istimewa Yogyakarta still experience outbreaks (Kejadian Luar Biasa) in recent years. As microscopic diagnosis is a gold standard diagnosis for malaria, thus accurate microscopic examination is important. Disappearance of malaria cases in malaria pre-elimination areas causes laboratory workers/microscopists are less exposed to experience in identifying malaria. As part of quality assurance, continuous quality control is expected to maintain the accuracy of malaria diagnosis in endemic areas. However, the cross-check sistem as a part of this quality control strategy still has constraints, such as: transportation costs, limited human resources and irregularity. Ibm team of Faculty of Medicine UGM has successfully developed a digital microscopic cross-check sistem. This method is able to bridge the distance and time constraint also transportation costs of slide submissions to be cross-checked to the referral laboratory. Our study partners were microscopists of Kulon Progo Primary Health Centers (Puskesmas) facilitated with digital devices installed in a microscope. Partners were trained to: 1. take microscopic images of suspected malaria parasites and 2. familiarize with digital cross-check sistem. The successful implementation of digital malaria cross-check is expected to improve the accuracy of malaria diagnosis and assist the Government in malaria elimination program especially in Kulon Progo. This system has been registered to obtain Hak Kekayaan Intelektual (registration number C00201705928) and is waiting the copyright.
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Marco-Dos Santos, Gema, Ignacio Melendez-Pastor, Jose Navarro-Pedreño, and Magaly Koch. "Assessing Water Availability in Mediterranean Regions Affected by Water Conflicts through MODIS Data Time Series Analysis." Remote Sensing 11, no. 11 (June 5, 2019): 1355. http://dx.doi.org/10.3390/rs11111355.
Повний текст джерелаАнотація:
Water scarcity is a widespread problem in arid and semi-arid regions such as the western Mediterranean coastal areas. The irregularity of the precipitation generates frequent droughts that exacerbate the conflicts among agriculture, water supply and water demands for ecosystems maintenance. Besides, global climate models predict that climate change will cause Mediterranean arid and semi-arid regions to shift towards lower rainfall scenarios that may exacerbate water conflicts. The purpose of this study is to find a feasible methodology to assess current and monitor future water demands in order to better allocate limited water resources. The interdependency between a vegetation index (NDVI), land surface temperature (LST), precipitation (current and future), and surface water resources availability in two watersheds in southeastern Spain with serious difficulties in meeting water demands was investigated. MODIS (Moderate Resolution Imaging Spectroradiometer) NDVI and LST products (as proxy of drought), precipitation maps (generated from climate station records) and reservoir storage gauging information were used to compute times series anomalies from 2001 to 2014 and generate regression images and spatial regression models. The temporal relationship between reservoir storage and time series of satellite images allowed the detection of different and contrasting water management practices in the two watersheds. In addition, a comparison of current precipitation rates and future precipitation conditions obtained from global climate models suggests high precipitation reductions, especially in areas that have the potential to contribute significantly to groundwater storage and surface runoff, and are thus critical to reservoir storage. Finally, spatial regression models minimized spatial autocorrelation effects, and their results suggested the great potential of our methodology combining NDVI and LST time series to predict future scenarios of water scarcity.
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Górski, Kamil, Marta Borowska, Elżbieta Stefanik, Izabela Polkowska, Bernard Turek, Andrzej Bereznowski, and Małgorzata Domino. "Application of Two-Dimensional Entropy Measures to Detect the Radiographic Signs of Tooth Resorption and Hypercementosis in an Equine Model." Biomedicines 10, no. 11 (November 13, 2022): 2914. http://dx.doi.org/10.3390/biomedicines10112914.
Повний текст джерелаАнотація:
Dental disorders are a serious health problem in equine medicine, their early recognition benefits the long-term general health of the horse. Most of the initial signs of Equine Odontoclastic Tooth Resorption and Hypercementosis (EOTRH) syndrome concern the alveolar aspect of the teeth, thus, the need for early recognition radiographic imaging. This study is aimed to evaluate the applicability of entropy measures to quantify the radiological signs of tooth resorption and hypercementosis as well as to enhance radiographic image quality in order to facilitate the identification of the signs of EOTRH syndrome. A detailed examination of the oral cavity was performed in eighty horses. Each evaluated incisor tooth was assigned to one of four grade–related EOTRH groups (0–3). Radiographs of the incisor teeth were taken and digitally processed. For each radiograph, two–dimensional sample (SampEn2D), fuzzy (FuzzEn2D), permutation (PermEn2D), dispersion (DispEn2D), and distribution (DistEn2D) entropies were measured after image filtering was performed using Normalize, Median, and LaplacianSharpening filters. Moreover, the similarities between entropy measures and selected Gray–Level Co–occurrence Matrix (GLCM) texture features were investigated. Among the 15 returned measures, DistEn2D was EOTRH grade–related. Moreover, DistEn2D extracted after Normalize filtering was the most informative. The EOTRH grade–related similarity between DistEn2D and Difference Entropy (GLCM) confirms the higher irregularity and complexity of incisor teeth radiographs in advanced EOTRH syndrome, demonstrating the greatest sensitivity (0.50) and specificity (0.95) of EOTRH 3 group detection. An application of DistEn2D to Normalize filtered incisor teeth radiographs enables the identification of the radiological signs of advanced EOTRH with higher accuracy than the previously used entropy–related GLCM texture features.
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Zhang, Hebing, Qingqing Yan, Fangfang Xie, and Shouchen Ma. "Evaluation and Prediction of Landscape Ecological Security Based on a CA-Markov Model in Overlapped Area of Crop and Coal Production." Land 12, no. 1 (January 9, 2023): 207. http://dx.doi.org/10.3390/land12010207.
Повний текст джерелаАнотація:
Overlapped areas of crop and coal production are responsible for national food security and mineral resource supply. However, long-term coal mining and urban and rural construction have continuously impacted the structure and functions of the original agricultural landscape ecosystem in the area and brought serious ecological security problems. On the basis of the results of remote sensing image classification of the Zhaogu mining area, this study explores the spatio-temporal variation characteristics of the landscape pattern and the evolution of ecological security and predicts the landscape ecological security status in 2029. Research results show that the evolution of the landscape pattern in the study area manifests obvious stage characteristics: from 2004 to 2014, the landscape pattern developed in the direction of fragmentation, irregularity, heterogeneity, and low connectivity; after 2014, the landscape pattern showed continuity, regularization, and high connectivity trends. By comparing the landscape ecological security of the study area from 2004 to 2019, a temporal change characteristic of first deteriorating and then gradually improving can be observed. By analyzing the changes in the distribution of the security status in the study area on a spatial scale, it can be found that the proportion of unsafe areas is significantly reduced in 2019 due to the influence of land remediation and reclamation. By constructing a CA-Markov prediction model with both spatial and quantitative advantages, the prediction results show that the degree of landscape fragmentation in the study area will be reduced, and the connectivity will be enhanced between 2019 and 2029. The shape of landscape patches tends to be regular, and the landscape heterogeneity will be enhanced. Overall, the landscape ecological security situation will continue to improve. The results could provide reference for ecological protection and related land reclamation planning of the mine area.
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Paape, A. "EXPERIMENTAL DATA ON THE OVERTOPPING OF SEAWALLS BY WAVES." Coastal Engineering Proceedings 1, no. 7 (January 29, 2011): 36. http://dx.doi.org/10.9753/icce.v7.36.
Повний текст джерелаАнотація:
In the past it has been found that serious damage and breaching of seawalls is most frequently caused by overtopping. Hence for the design of seawalls data must be available about the overtopping by waves of the different profiles that might be possible. Naturally the conditions under which damage is caused to the seawall also depend on the type of construction and the materials used, for example: the stability of grass covered dikes can be endangered seriously by water flowing over the inner slope. In many designs the necessary height of a seawall has been defined such that not more than 2% of the waves overtop the crest, under chosen design conditions. This criterion has been determined on the assumption that the overtopping must remain very small. Some overtopping has to be accepted because no maximum value for wave height and wave run-up can be given, unless of course the wave height is limited by fore-shore conditions. Unfortunately this criterion gives no information about the volume and concentration of water overtopping the crest in each instance. Moreover it is of interest to know how this overtopping varies with other conditions, such as changes in the significant wave height. Information about the overtopping by waves was obtained from model investigations on simple plane slopes w^th inclinations varying from 1 : 8 to 1 : 2. The experiments were made in a windflume where wind generated waves as well as regular waves were employed. Using wind generated waves, conditions from nature regarding the distribution of wave heights could be reproduced. It appeared that the overtopping depends on the irregularity of the waves and that the same effects cannot be reproduced using regular paddle generated waves. In this paper a description of the model and the results of these tests are given. Investigations are m progress on composite slopes, including the reproduction of conditions for a seawall which suffered much overtopping but remained practically undamaged during the flood of 1953.
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Ben Ammar, L., A. Ben Tekaya, M. Ben Hammamia, O. Saidane, S. Bouden, R. Tekaya, I. Mahmoud, and L. Abdelmoula. "FRI0432 INTEREST OF IMAGING IN THE DIAGNOSIS OF INFECTIOUS SPONDYLODISCITIS (ABOUT 113 CASES)." Annals of the Rheumatic Diseases 79, Suppl 1 (June 2020): 814.1–814. http://dx.doi.org/10.1136/annrheumdis-2020-eular.4770.
Повний текст джерелаАнотація:
Background:Infectious spondylodiscitis is a diagnosis and therapeutic emergency. Its clinical presentation can be insidious and standard radiographs can be falsely reassuring. This explains the interest of cross-sectional imaging and more particularly magnetic resonance imaging (MRI).Objectives:To analyse the contribution of imaging in the diagnosis of infectious spondylodiscitis.Methods:These are 113 cases of spondylodiscitis collected in a rheumatology department over a period of 20 years [1998-2018]. The diagnosis is made on the basis of clinical, biological, radiological and bacteriological data.Results:Our population was divided into 62 men (54.9%) and 51 women (45.1%) (p = 0.8) with an average age of 55 years [16–86]. Predisposing factors were found in 52.2% of cases: diabetes (23%), neoplasia (2.7%), hepathopathy (5.3%), long-term corticosteroid therapy (1.8), recent surgery (3.5%), history of tuberculosis (2.7%) and consumption of unpasteurized dairy products (28.3%).The approximate time between onset of symptoms and diagnosis ranged from 0.23 to 24 months (median 3 months). Impaired general condition was observed in 81% of the cases and fever in 34.5% of the cases. Radiculalgia was found in 46% of the cases and a neurological deficit was noted in 16% of the cases. Biological inflammatory syndrome was found in 91.2% of the cases.Standard radiographs of the spine were abnormal in 85% of cases, showing disc space narrowing (72%), irregularity of the vertebral plates (35.5%), erosions (13.1%) and para-vertebral spindle (4.7%). CT and spinal MRI were performed respectively in 57.5% and 70.8% of cases and revealed: erosions (46.2%), mirrored geodes (16.9%), para-vertebral abscess (57.5%), epiduritis (71.3%) and spinal compression (26.3%). The lumbar spine was the most affected (55.8%), followed by the dorsal spine (30.1%) and the cervical spine (8.8%). The Infectious spondylodiscitis was multifocal in 24.8% and multi-stage in 12.4% of cases.A disco-vertebral biopsy was performed in 70% of cases and was contributory in 44.3% of cases. The causative organism was tuberculosis in 55.8% of cases, brucellosis in 21.2% of cases and pyogenic germs in 23% of cases.Conclusion:Imaging plays an important role in the diagnosis of spondylodiscitis. MRI is considered the key examination, capable of mapping injuries and detecting potentially serious neurological complications. The importance of imaging the entire spine to detect multifocal forms should also be emphasized.Disclosure of Interests:None declared
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Rossi, Luciana, Lauretta Turin, Giovanni Loris Alborali, Eugenio Demartini, Joel Fernando Soares Filipe, Federica Riva, Pietro Riccaboni, et al. "Translational Approach to Induce and Evaluate Verocytotoxic E. coli O138 Based Disease in Piglets." Animals 11, no. 8 (August 17, 2021): 2415. http://dx.doi.org/10.3390/ani11082415.
Повний текст джерелаАнотація:
Pig livestock was influenced by several global concerns that imposed a re-thinking of the farming system, which included the reduction in chemical dependency and the development of antimicrobial alternatives. Post-weaning diarrhea and enterotoxaemia caused by Escherichia coli, are serious threats that are responsible for the economic losses related to mortality, morbidity and stunted growth in weaning piglets. The aim of the study was to set up experimental conditions to simulate the simultaneous outbreak of post-weaning diarrhea and enterotoxaemia in weaned piglets, through verocytotoxic O138 Escherichia coli challenge, with a multidisciplinary approach. Eighteen piglets susceptible to F18 VTEC infection were selected by polymerase chain reaction for polymorphism on the fucosyltransferase 1 gene and randomly divided in two experimental groups, non-infected controls (C; n = 6) and infected ones (I; n = 12) and housed into individual pens at the same environmental conditions for 29 days. At day 20, I pigs were orally inoculated with Escherichia coli O138 and fed a high protein ration for 3 days. Zootechnical, clinical, microbiological, histological and immunological parameters were evaluated along the follow up (3 and 9 days). Experimental infection, confirmed by bacteria faecal shedding of the I group, significantly affected the clinical status. The I group showed significantly higher total scores, corresponding to medians of the sum of daily scores from days 1 to 3 (Σ3) and 1 to 9 (Σ9) post infection, epiphora, vitality, hair irregularity, oedema and depression. Histological examination showed evident inflammatory infiltrate of lymphocytes, and follicular hyperplasia in I pigs; in the same group, the immunohistochemical and immunological assays revealed an increase in IgG in the intestinal crypts and CD3-positive T cells in intestinal epithelium. The experimental Escherichia coli infection in controlled conditions is crucial for both the evaluation of innovative compounds and the elucidation of the mechanisms associated with the persistence of antibacterial resistant strains. In conclusion, the adopted infection model, carried out on receptor-mediated susceptible piglets, allowed us to identify a discriminative panel of clinical symptoms related to Escherichia coli O138 infection, and could be used to assess the protective effect of antibiotic alternatives.
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Khan, Zafar, Mushtaq Ahmad, Ghufran Dr, Ghulam Nabi, and Asma Hameed. "Assessing the Primary Causes of Hypertension in Khyber Pakhtunkhwa, Pakistan." Journal of Biology and Life Science 6, no. 2 (March 13, 2015): 24. http://dx.doi.org/10.5296/jbls.v6i2.7119.
Повний текст джерелаАнотація:
Hypertension also called a silent killer is a serious problem. The numbers of hypertensive patients are increasing day by day. The present study aim to assess the primary causes of hypertension in Khyber Pakhtunkhwa. Data for the study were collected from 298 hypertensive patients who were admitted or visited to Hayatabad Medical Complex Peshawar as patients. Simple random sampling method was used for selection of the sampled respondents. The results indicate a significant association between hypertension and the level of education (P=.000). Educated people were found not only having more information about hypertension but also found more conscious about the disease (P=.000), while no or low level of educated patients were reported not only caring (P.000) the hypertension but also were not consulting doctors (P=.000). Sampled hypertensive patients were also agreed that regular use of antihypertensive medicines (P=.000), easy supply of medicines (P=.001), regular exercise (P=.000) and regular check-up of blood pressure (P.000) can help maintain blood pressure in normal range while irregularity in taking of medicines (P=.000) and sedentary life style (P=.000) contributed to high blood pressure. Dietary habits (P=.005) such as junk food (P=.000) and spicy diet (P.000) reported affected the blood pressure. Regarding precautions significant association was found with life style modification (P=.000), regular check-up of blood pressure (P=.000), regular exercise (P=.036), weight reduction (P=.001), avoid alcohol consumption (P=.000), stopped smoking (P=.000) and avoid stress (P=.002) along with more use of vegetables and fruits (P=.001). On the other hand hypertension was also associated significantly with the people who have obesity (P=.004), lake of exercise P=.000), old people (P=.034), low socio-economic status (P=.000), kidney diseases (P=.000), endocrine diseases (P=.000), excessive salt intake (P=.008), low potassium intake (P=.010) and family history (P=.001). Individually and psychologically the hypertension can also be due to alcohol intake (P=.000), cigarette smoking (P=.000), sedentary life style (P=.000), lake of exercise (P=.000), lake of knowledge about the signs, symptoms of hypertension (P=.000), its causes (P=.000), and precautions (P=.000). Study recommends that in order to control hypertension, a special attention is needed to follow the precautions about hypertension, diet plan, regular check-up of blood pressure, awareness about the disease and avoid stress.
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Chaudhary, Rabia, Komal Aftab, Ghazala Iqbal, Summaiya Moazzam, MS Khushboo Chandio, and Tania Naveel. "Assessment Clinical Association of Thyroid Function in Women of Reproductive Age Group with Abnormal Uterine Bleeding." Pakistan Journal of Medical and Health Sciences 16, no. 11 (November 30, 2022): 808–12. http://dx.doi.org/10.53350/pjmhs20221611808.
Повний текст джерелаАнотація:
Background: Abnormal Uterine Bleeding occurs when the frequency and quantity of menstrual bleeding in females is significantly altered. It is the most prevalent clinical presentation in gynecology, affecting more than 20% of the female population, and is characterized by variations from normal menstruation in terms of irregularity in periods, frequency, duration of blood flow, amount of blood loss, and cyclicity. Thyroid hormones had significant effects on the female reproductive system, such as delayed puberty, infertility, premature menopause, recurrent abortions, and AUB. The AUB is significantly associated with thyroid secretions, and any patient who complains of AUB or irregular menstruation must have thyrotoxicosis ruled out. Objectives: This study was conducted at the Department of Obstetrics and Gynecology, Nishtar Hospital, Multan, Pakistan, (2021-22) in order to evaluate the clinical association between thyroid function and AUB in women of different reproductive age groups. Methods: This cross-sectional study was conducted in the outpatient department of Obstetrics & Gynecology, Nishtar Hospital, Multan, from 1st December 2021 to 31st May 2022. 320 patients participated in the study and were examined clinic-pathologically and were allocated into three groups based on their thyroid profile (euthyroid, hyperthyroid and hypothyroid, respectively) and further predisposition risk factors were recorded and analyzed. Results: It was discovered that extreme age groups of adolescence and pre-menopause phase significantly (p<0.05) increased the incidence of AUB. The incidence of AUB was also elevated (p<0.05) among patients with an abnormal BMI, women with multiple pregnancies, and married women. The menstrual bleeding pattern was also studied in females, with polymenorrhea (131/320) being the most prevalent (p<0.05), followed by menorrhagia (79/320), metrorrhagia (59/320), oligomenorrhea (42/320), and amenorrhea (9/320) having a significantly lower incidence (p<0.05). The incidence rate of thyroid disorders was 28.12% (90/320), with hypothyroidism affecting 77(24.06%) and hyperthyroidism affecting 13(4.06%) patients (p<0.05). Practical implication: AUB is significantly associated (p<0.05) with thyroid hormones, therefore for early diagnosis of the underlying etiology and treatment of the patients by preventing hysterectomy and other serious surgical interventions, all patients presenting to OPD clinics with the complaint of AUB or irregular menstruation must be ruled out for a thyroid profile in the first instance. Conclusion: It was concluded that thyroid disorders directly affected the BMI, fertility and menstrual cycle of gynecology patients and increased the incidence of AUB along with the medical and gynecological complications. Keywords: Amenorrhea; Hyperthyroidism; Hypothyroidism; Polymenorrhea; Thyrotoxicosis.
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Skoryk, M. M. "Review of the National Experience of Measuring Gender Inequality in Ukraine, 2009–2021. Part IІ. Donor’s and Non-governmental Organizations’ Initiatives of Gender Measurements". Statistics of Ukraine 96, № 1 (12 липня 2022): 106–16. http://dx.doi.org/10.31767/su.1(96)2022.01.10.
Повний текст джерелаАнотація:
The second part of the review describes and analyzes national gender measurement practices initiated in Ukraine by international donors and local organizations since 2009. The indisputable focus of international donors (five of the six instruments developed during this period) was found to be local-level measurements. Neither the national nor sectoral dimensions had such interested donor support. Thanks to these developments, certain steps forward have been made: several well-thought-out and well-structured tools have been proposed among the latest and developed by gender specialists from abroad; the thought-over structures of directions of gender measurement are offered.
At the same time, all tools developed for the local level: 1) were not correlated and had no connection with previous developments (each of them was developed autonomously); 2) five out of six did not provide a clear link with the national gender measurements, thus creating a gap between the results of local and national gender measurements and making them disproportionate in their results; 3) these tools did not provide, except for the gender passport of the Association of Ukrainian Cities, the regularity of their use, thus continuing the negative trend of irregularity of gender measurements in Ukraine; and did not propose to establish appropriate bodies; 4) did not provide for participation in development teams of relevant research institutions, or even only the participation of academic gender researchers. The developers are definitely dominated by civil society activists and their coordinators from international donor organizations. In addition, the number of developers in such development teams is usually small. This leads to non-compliance with scientific procedures in the development of tools and in the actual measurements and calls into question both the effectiveness of such tools and the objectivity of the results obtained with their help. It also pushes gender issues to the periphery of national research and education practices in Ukraine, depriving the gender equality advocates of the opportunity to integrate gender issues into professional activities in academia. It is because of the exclusion of the academic community from the processes of developing gender measurement tools that Ukraine is unable to obtain such an indispensable source of gender data as research data.
Conclusions were made on the serious and diverse experience of Ukraine in the field of national gender measurements, as well as the experience of creating groups and networks of active citizens ready to conduct such measurements to improve the social situation of their communities, regions, and cities. The need to move to the next stage of professionalization of gender measurements, their implementation on a solid professional basis, and integration into the activities of professional statistical, sociological, managerial institutions and communities are pointed out.
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Shelar, Rohit, A. K. Singh, and Saikat Maji. "Constraints in Adapting the Climate Change in Konkan Region of Maharashtra." Indian Journal of Extension Education 58, no. 1 (2022): 169–71. http://dx.doi.org/10.48165/ijee.2022.58132.
Повний текст джерелаАнотація:
Changing climate is a serious environmental issue affecting agricultural production all overthe world. India is also facing the problem of increased mean temperature and irregularityof rainfall, and the Konkan region of Maharashtra is also not escaped from this issue. Thestudy was designed and conducted in the northern part of the Konkan region to understandthe constraints experienced by the farmers while adapting the climate change. The studywas carried in four villages of Palghar district with 245 respondents selected byproportionate random sampling method. Major constraints were expressed by the farmerswhile adapting the changing climate were, lack of credence on current weather forecastingsystem, poor accurate weather forecast information, irregular & low voltage capacity powersupply and seven others.
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Kong, Jingchang, Yuhan Su, Zhi Zheng, Xiaomin Wang, and Yukang Zhang. "The Influence of Vertical Arrangement and Masonry Material of Infill Walls on the Seismic Performance of RC Frames." Buildings 12, no. 6 (June 14, 2022): 825. http://dx.doi.org/10.3390/buildings12060825.
Повний текст джерелаАнотація:
This study presents a finite element (FE) model, the accuracy of which is verified by the comparison between the numerical and test results. The calibrated model is used to investigate the influence of vertical arrangement and masonry material of infill walls on the seismic performance of reinforced concrete (RC) frames through pushover analysis and time–history analysis. The lateral capacity, interstorey drift ratio, and plastic hinge distribution of structures is discussed. It was found that the damage of frames with irregular vertical infill arrangement is more serious than that of bare frames, which should be limited in the seismic design process. Moreover, the disadvantages induced by the elastic modulus of masonry material should be considered in the seismic design and assessment of the frames with vertical irregularly arranged infill.
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Kottow, Miguel. "Two public health conflicts during the pandemic." Revista Bioética 30, no. 4 (December 2022): 697–704. http://dx.doi.org/10.1590/1983-80422022304561en.
Повний текст джерелаАнотація:
Abstract The COVID-19 pandemic saw unprecedented responses to the allocation of scarce and insufficient triage resources and to the difficulties in establishing containment measures, which oscillated between suggestive, persuasive and coercive. Classical triage criteria were replaced by extreme utilitarianism based on objectively evaluated medical criteria to privilege the critically ill with a recoverable prognosis by applying extreme support and treatment measures. Mandatory containment measures and the call for vaccination failed to achieve convincing scientific support; applied irregularly and plagued by uncertainties and insecurities, they affected disadvantaged groups and caused public outcry and disrespect. Triage based on utilitarian medical criteria caused distress and serious mental strains in medical decision-makers and members of ad hoc committees. These experiences suggest renewing the individualistic and elitist bioethical discourse to privilege the common good over individual interests.
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Xia, Lina, Changliang Shao, Naili Zhang, Aiping Wu, Jiangbo Xie, Yajing Qiu, Xiaobin He, Jia Pei, Xudong Wang, and Yanhong Wang. "Improved Tolerance of Mycorrhizal Torreya grandis Seedlings to Sulfuric Acid Rain Related to Phosphorus and Zinc Contents in Shoots." Journal of Fungi 7, no. 4 (April 14, 2021): 296. http://dx.doi.org/10.3390/jof7040296.
Повний текст джерелаАнотація:
Acid rain (AR) is an increasingly serious environmental problem that frequently occurs in Southern China with sulfuric acid rain (SAR) as the main type. SAR can negatively affect the growth and physiological properties of trees, but mycorrhizal associations may mitigate such detrimental effects. However, the mechanisms by which arbuscular mycorrhizal fungi control SAR-induced impacts on Torreya grandis plants remain unclear. A pot experiment was conducted on T. grandis seedlings, an economically important tree species in Southern China, in which inoculated and non-inoculated T. grandis seedlings were subjected to three simulated SAR regimes (pH of 5.6, 4.0, and 2.5, respectively) to examine the effects on the growth, osmotic regulation, and nutrient absorption of these seedlings. The results show that, although SAR had no effect on the accumulation of biomass, it significantly decreased the concentrations of proline and soluble protein, shoot Zn2+, P, K+, and Ca2+ concentrations, and the Fe2+ and Mn2+ concentrations of shoots and roots. Mycorrhizal inoculation, especially with Rhizophagus irregularis, significantly increased total biomass, proline concentration, and the Zn2+, P, and K+ concentrations in the shoots of T. grandis under lower pH conditions. Moreover, our findings suggest that the combination of root colonization, acid tolerance, and the concentrations of shoot-P, shoot-Zn2+, and root-Fe2+ of T. grandis jointly conferred mycorrhizal benefits on the plants under SAR conditions. Given the enhancement of the nutritional quality of T. grandis owing to mycorrhizal associations, inoculation with R. irregularis may be preferable for the culturing and management of these plants under acidic conditions.
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Goodall, H. B., A. H. Reid, D. J. Findlay, C. Hind, J. Kay, and G. Coghill. "Irregular Distortion of The Erythrocytes (Acanthocytes, Spur Cells) in Senile Dementia." Disease Markers 12, no. 1 (1994): 23–41. http://dx.doi.org/10.1155/1994/493810.
Повний текст джерелаАнотація:
An excess of irregularly di storted red cells with spiked forms (acanthocytes. spur cells) has been found in a substantial minority of patient s with seni le dementia of Alzheimer type (7 of 50 patients, 3 of 21 men and 4 of 29 women). Of 100 control patients, 42 men and 58 women), 5 (men and 2 women) showed comparable distortion, but, of these, one man may well have incipient dementia and the others had serious organic di seases which may be associated with comparable erythrocytic changes. The cause of the distortion is not yet clear, but the presence of occasional giant erythrocytes in the absence of general macrocytosis suggests a possible abnormality of cell membrane synthes is. This distortion may be a useful marker in patients with loss of memory. Whether it is a manifestation of a haemopoietic clone or a constitutional anomaly associated with Alzheimer’s disease remains to be seen.
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Holopainen, Toini, and Pekka Nygren. "Effects of potassium deficiency and simulated acid rain, alone and in combination, on the ultrastructure of Scots pine needles." Canadian Journal of Forest Research 19, no. 11 (November 1, 1989): 1402–11. http://dx.doi.org/10.1139/x89-215.
Повний текст джерелаАнотація:
The effects of potassium deficiency and artificial acid precipitation, alone and in combination, on Scots pine (Pinussilvestris L.) needles were studied using transmission electron microscopy. The seedling material was grown in quartz sand culture and watered with nutrient solution containing 45, 20, 10, or 5 mg of potassium/L; the concentration of other nutrients was constant and equally available for all seedlings. A portion of the seedlings from each group received consecutive acidified water spraying of pH 4.5, 4.0, 3.5, and 3.0, each for 4 days with a 3-day resting period between applications. The potassium deficiency caused an increase in the proportional vacuolar space and severe vesiculation of the tonoplast. Irregularly shaped lipid structures increased in number in the cytoplasm, and lipid bodies also appeared in the vacuoles and occasionally in the chloroplasts. The symptoms related to potassium deficiency were more severe in the transfusion parenchyma cells than in the mesophyll. The lowest level of potassium produced almost complete disorganization of the cellular structures in the transfusion parenchyma tissue, but severe changes were also seen in the mesophyll. The simulated acid rain treatment caused the formation of protrusions in the chloroplasts and an increase in irregularly shaped lipid structures in the cytoplasm throughout the mesophyll tissue, but no clear symptoms were observed inside the bundle sheath. In general, the changes caused by acid rain in the chloroplasts were slight and did not cause serious disorganization of these organelles. When the seedlings were exposed to combination treatment, the typical symptoms of both exposures were observable. The results suggest that the stresses caused by potassium deficiency and short-term foliar acid rain treatment can be distinguished in the needle ultrastructure.
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Vachev, A. N., O. V. Dmitriev, O. V. Zeleva, and P. M. Zelter. "Carotid chemodectoma in the otorhinolaryngological practice: a clinical case." Kuban Scientific Medical Bulletin 27, no. 2 (April 12, 2020): 135–43. http://dx.doi.org/10.25207/1608-6228-2020-27-2-135-143.
Повний текст джерелаАнотація:
Aim. To describe a clinical case of carotid chemodectoma in a patient seeking treatment from an otorhinolaryngologist.Results. A 79-year-old woman complained of sore throat and difficulty swallowing. Mesopharyngoscopy revealed a significant asymmetry of the pharynx on the right with a sagging soft palate. Computed tomography revealed the asymmetry of the pharynx on the right due to compression from outside. An irregularly shaped formation intensely accumulating contrast medium was detected in the periopharyngeal space on the right, near the bifurcation of the carotid artery. Carotid chemodectoma was suspected. The patient underwent surgical removal of the chemodectoma followed by the autoarterial reconstruction of the carotid artery on the right. The postoperative period was uneventful.Conclusion. The management of patients with carotid chemodectoma requires an interdisciplinary approach with participation of vascular surgeons, otorhinolaryngologists and radiologists. This approach ensures timely surgical treatment leading to complete recovery without neurological consequences and profuse blood loss. The disease can be mistaken for a peritonsillar abscess with the possibility of serious complications during surgical treatment.