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39篇 您的检索式:作者名="Wojtecki"
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1The treatment of Parkinson's disease with deep brain stimulation: current issues显示文摘Deep brain stimulation has become a well-established symptomatic treatment for Parkinson's disease during the last 25 years. Besides improving motor symptoms and long-term motor complications, positive effects on patients' mobility, activities of daily living, emotional well-being and health-related quality of life have been recognized. Apart from that, numerous clinical trials analyzed effects on non-motor symptoms and side effects of deep brain stimulation. Several technical issues and stimulation paradigms have been and are still being developed to optimize the therapeutic effects, minimize the side effects and facilitate handling. This review summarizes current therapeutic issues, i.e., patient and target selection, surgical procedure and programming paradigms. In addition it focuses on neuropsychological effects and side effects of deep brain stimulation.Alexia-Sabine Moldovan Stefan Jun Groiss Saskia Elben Martin Südmeyer Alfons Schnitzler Lars Wojtecki 2015Neural Regeneration Research2015,10,7:8
2Use of machine learning algorithms to assess the state of rockburst hazard in underground coal mine openings显示文摘The risk of rockbursts is one of the main threats in hard coal mines. Compared to other underground mines, the number of factors contributing to the rockburst at underground coal mines is much greater.Factors such as the coal seam tendency to rockbursts, the thickness of the coal seam, and the stress level in the seam have to be considered, but also the entire coal seam-surrounding rock system has to be evaluated when trying to predict the rockbursts. However, in hard coal mines, there are stroke or stress-stroke rockbursts in which the fracture of a thick layer of sandstone plays an essential role in predicting rockbursts. The occurrence of rockbursts in coal mines is complex, and their prediction is even more difficult than in other mines. In recent years, the interest in machine learning algorithms for solving complex nonlinear problems has increased, which also applies to geosciences. This study attempts to use machine learning algorithms, i.e. neural network, decision tree, random forest, gradient boosting, and extreme gradient boosting(XGB), to assess the rockburst hazard of an active hard coal mine in the Upper Silesian Coal Basin. The rock mass bursting tendency index WTGthat describes the tendency of the seam-surrounding rock system to rockbursts and the anomaly of the vertical stress component were applied for this purpose. Especially, the decision tree and neural network models were proved to be effective in correctly distinguishing rockbursts from tremors, after which the excavation was not damaged. On average, these models correctly classified about 80% of the rockbursts in the testing datasets.Lukasz Wojtecki Sebastian Iwaszenko Derek B.Apel Mirosawa Bukowska Janusz Makówka 2022Journal of Rock Mechanics and Geotechnical Engineering2022,14,3:4
3Effects of torpedo blasting on rockburst prevention during deep coal seam mining in the Upper Silesian Coal Basin显示文摘In the Upper Silesian Coal Basin(USCB),coal seams are exploited under progressively more difficult geological and mining conditions(greater depth,higher horizontal stress,more frequent occurrence of competent rock layers,etc.).Mining depth,dislocations and mining remnants in coal seams are the most important factors responsible for the occurrence of rockburst hazards.Longwall mining next to the mining edges of neighbouring coal seams is particularly disadvantageous.The levels of rockburst hazards are minimised via the use of rockburst prevention methods.One active prevention method is torpedo blasting in roof rocks.Torpedo blastings are performed in order to decrease local stress concentrations in rock masses and to fracture the roof rocks to prevent or minimise the impact of high-energy tremors on excavations.The estimation of the effectiveness of torpedo blasting is particularly important when mining is under difficult geological and mining conditions.Torpedo blasting is the main form of active rockburst prevention in the assigned colliery in the Polish part of the USCB.The effectiveness of blasting can be estimated using the seismic effect method,in which the seismic monitoring data and the mass of explosives are taken into consideration.The seismic effect method was developed in the Czech Republic and is always being used in collieries in the Czech part of the coal basin.Now,this method has been widely adopted for our selected colliery in the Polish part of the coal basin.The effectiveness of torpedo blastings in the faces and galleries of the assigned longwall in coal seam 506 has been estimated.The results show that the effectiveness of torpedo blastings for this longwall was significant in light of the seismic effect method,which corresponds to the in situ observations.The seismic effect method is regularly applied to estimating the blasting effectiveness in the selected colliery.L. Wojtecki P. Konicek J. Schreiber 2017Journal of Rock Mechanics and Geotechnical Engineering2017,9,4:2
4Risk communication, the West Nile virus epidemic, and bioterrorism: responding to the commnication challenges posed by the intentional or unintentional release of a pathogen in an urban setting显示文摘Vincent T. Covello Richard G. Peters Joseph G. Wojtecki Richard C. Hyde 2001Journal of Urban Health2001,,2:2
5Risk communication, the wesi nile virus epidemic, and bioterrorism:responding to the communication challenges posed by the intentional or unintentional release of a pathogen in an urban setting 显示文摘Covello VT Peters RG Wojtecki JG 2001Urban Health2001,78,2:1
6Risk communication, the west nile virus epidemic, and bioterrorism: responding to the communication challenges posed by the intentional or unintentional release of a pathogen in an urban setting 显示文摘Covello V T Peters R G Wojtecki J G 2001Journal of urban health: Bulletin of the New York Academy of Medicine2001,78,2:1
7Deep brain stimulation in Parkinson's disease 显示文摘Groiss SJ Wojtecki L Slldmeyer M 2009Ther Adv Neurol Disord2009,2,6:1
8Risk Communication, the West Nile Virus Epidemic, and Bioterrorism: Responding to the Communication Challenges Posed by the Intentional or Unintentional Release of a Pathogen in an Urban Setting显示文摘Covello V T Peters R G Wojtecki J G Hyde R C 2001Journal of Urban Health: Bulletin of the New York Academy of Medicine2001,78,2:1
9Risk Communication, the West Nile Virus Epidemic, and Bioterrorism: Responding to the Communication Challenges Posed by the Intentional or Unin- tentional Release of a Pathogen in an Urban Setting显示文摘Covello V T Peters R G Wojtecki J G 2001Journal of Urban Health: Bulletin of the New York Academy of Medicine2001,78,2:1
10Increased SMA–M1 coherence in Parkinson’s disease — Pathophysiology or compensation?显示文摘Bettina Pollok Daniel Kamp Markus Butz Lars Wojtecki Lars Timmermann Martin Südmeyer Vanessa Krause Alfons Schnitzler 2013Experimental Neurology2013,,:1
11Deep brain stimulation of the subthalamic nucleus transiently enhances loss-chasing behaviour in patients with Parkinson's Disease显示文摘Rogers RD Wielenberg B Wojtecki L 0,,:1
12Risk communication, the West Nile virus epidemic, and bioterrorism: responding to the communication challenges posed by the intentional or unintentional release of a pathogen in an urban setting显示文摘CoveUo VT Peters RG Wojtecki JG 2001Journal of Urban Health: Bulletin of the New York Academy of Medicine2001,78,2:1
13Risk communication, the West Nile virus epidemic and bioterrorism: responding to the communication challenges posed by the intentional or unintentional release of a pathogen in an urban setting 显示文摘Covello VT Peters RG Wojtecki JG 2001J Urban Health2001,78,2:1
14Risk communication,the West Nile Virus Epidemic, and Bioterror- ism:responding to the communication challenges posed by the intentional or unintentional release of a pathogen in an urban setting显示文摘COVELLO V T PETERS R G WOJTECKI J G 2001Journal of Urban Health2001,78,2:1
15Risk Communication,the West Nile Virus Epidemic,and Binterrorism:Responding to the Communication Challenges Posed by the intentional or unintentional Release of a Pathogen in an Urban Setting Journal of Urban health 显示文摘Covello V T Peters R G Wojtecki J G Hyde R C 2001Bulletin of the New York Academy of Medicine2001,78,2:1
16Risk Communication, the West Nile virus epidemic, and bioterrorism: Respon- ding to the communication challenge posed by the intentional or unintentional release of a pathogen in an urban setting显示文摘Covello V T Peter R G Wojtecki J G 2001Journal of Urban Health: Bulletin of the New York Academy of Medicine2001,78,2:1
17Deep brain stimulation in Parkinson's disease显示文摘Groiss SJ Wojtecki L Siidmeyer M 2009The Adv Neurol Disord2009,2,6:1
18The influence of mining factors on seismic activity during longwall mining of a coal seam显示文摘In this article an attempt to determine the influence of mining factors on the seismic activity during the longwall mining of the upper layer of coal seam no.405/2 in one of the Polish hard coal mines in the Upper Silesian Coal Basin was conducted.Two longwall panels were mined in analogous geological conditions and based on the same mining system and technology.However,there was significant difference with regards to the mining factors,which was reflected in the observed seismic activity.Some tools used in mining seismology were applied to illustrate the aforementioned influence of mining factors,e.g.the frequency-energy distribution,the frequency-magnitude distribution,the 2 D distribution of released seismic energy,the relationship between released seismic energy and the volume of mined coal,the Benioff strain release,and the Gutenberg-Richter(GR)b coefficient distribution(b is the proportion between high and low energy tremors).Concerning the Benioff strain release,a new solution,based on the slope of a fitted line in a moving time window,is proposed.Łukasz Wojtecki Joanna Kurzeja Małgorzata Knopik 2021International Journal of Mining Science and Technology2021,31,3:1
19Wilson’s disease tremor is associated with magnetic resonance imaging lesions in basal ganglia structures显示文摘Sudmeyer M Saleh A Wojtecki L 2006Mov Disord2006,21,:1
20查看详情显示文摘Wojtecki R J Meador M A Rowan S J 0,,01:1
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