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Search Results: 1 - 10 of 573 matches for " Jaukovi? Novak "
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Control of leg movements driven by electrically stimulated muscles
Radulovi? Milovan,Popovi? Dejan B.,JaukoviNovak
Journal of Automatic Control , 2003, DOI: 10.2298/jac0302035r
Abstract: A planar biomechanical model of a human leg has been developed to investigate automatic control strategies for artificially stimulated muscle using electrical stimulation (ES). The model comprises the nonlinear multiplicative model of the muscles, tendons and two body segments (thigh and shank-foot complex), that is, the hip and the knee. Flexor and extensor muscles are included for each joint. The parameters determining the model used for the analysis can all be assessed; hence, the model can be customized to a particular subject. Simulation software is organized within the SIMULINK environment, and the user can easily change parameters of the model by using Dialogue Boxes. The simulation allows determining constraints imposed by parameters, which are essential for designing control system for rehabilitation of humans with disabilities.
Technetium-99m scintimammography in the diagnosis of malignant breast tumors
Jaukovi? Ljiljana
Vojnosanitetski Pregled , 2004, DOI: 10.2298/vsp0401035j
Abstract: Background. Technetium-99m (99mTc) tetrofosmin scintigraphy is a new imaging method for the diagnosis of various malignancies, such as lung, thyroid, and most frequently breast neoplasms. The aim of this study was to evaluate the diagnostic reliability of 99mTc-Tetrofosmin breast scintigraphy in the detection of malignant breast disease. Methods. 99mTc -Tetrofosmin scintimammography (SMM) was performed in 28 patients with 30 breast lesions suspicious for malignancy. Standard mammography (MM) was also done. After surgery, the results of SMM and MM were compared to definitive histopathological findings as the "gold standard". After intravenous injection of radiotracer, SMM was performed in prone and supine views of the thorax, using large field-of-view Gamma camera. Results. The results of SMM were interpreted visually and semiquantitatively, and evaluated as positive or negative. Sensitivity, specificity and accuracy, positive (PPV) and negative predictive value (NPV) were obtained in relation to histopathology. After comparing the results of SMM and MM, SMM was proved more sensitive (95% for SMM vs. 80% for MM), while the specificity of both methods was similar. Conclusion. The results of this study indicate that the contribution of SMM as a nuclear medicine procedure has its place in the diagnostic protocol for patients suspected of malignant breast cancer.
Factors Impacting Corn (Zea mays L.) Establishment and the Role of Uniform Establishment on Yield  [PDF]
Lindsey Novak, Joel Ransom
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.910092
Abstract: Information from actual farm fields can help corn producers understand the value and importance of establishing uniform crop emergence and within-row plant spacing. Thirty-eight fields planted with corn (Zea mays L.) by North Dakota producers were evaluated to determine the effects of uneven plant emergence timing and within-row plant space variability, as well as identifying contributing factors. Rows within a planter’s width with the most variability yielded 6% less than the least variable rows. Individual ear weights decreased as the number of days after normal emergence (date when 50% of plant stand emerged) increased. Ears next to within-row gaps (>30.5 cm) weighed 11% more than the normally spaced plants. Combined ears from both plants situated <5.1 cm apart weighed 36% more than from a single ear from normally spaced plants. Surface residue and planting speed impacted stand establishment variability more often than other factors measured. Producers should assess each field environment individually in order to identify best practices to achieve uniform stand establishment.
Characteristics of heat flow in recuperative heat exchangers
Lalovi? Milisav,Radovi? ?arko,Jaukovi? Nada
Hemijska Industrija , 2005, DOI: 10.2298/hemind0510270l
Abstract: A simplified model of heat flow in cross-flow tube recuperative heat exchangers (recuperators) was presented in this paper. One of the purposes of this investigation was to analyze changes in the values of some parameters of heat transfer in recuperators during combustion air preheating. The logarithmic mean temperature (Atm) and overall heat transfer coefficient (U), are two basic parameters of heat flow, while the total heated area surface (A) is assumed to be constant. The results, presented as graphs and in the form of mathematical expressions, were obtained by analytical methods and using experimental data. The conditions of gaseous fuel combustions were defined by the heat value of gaseous fuel Qd = 9263.894 J.m-3, excess air ratio λ= 1.10, content of oxygen in combustion air ν(O2) = 26%Vol, the preheating temperature of combustion air (cold fluid outlet temperature) tco = 100-500°C, the inlet temperature of combustion products (hot fluid inlet temperature) thi = 600-1100°C.
Effect of step-synchronized vibration stimulation of soles on gait in Parkinson's disease: a pilot study
Peter Novak, Vera Novak
Journal of NeuroEngineering and Rehabilitation , 2006, DOI: 10.1186/1743-0003-3-9
Abstract: This pilot study assessed the effects of enhanced proprioceptive feedback using step-synchronized vibration stimulation of the soles (S-VS) on gait in PD. S-VS was used in 8 PD subjects (3 women and 5 men, age range 44–79 years, on medication) and 8 age-matched healthy subjects (5 women and 3 men). PD subjects had mild or moderate gait impairment associated with abnormal balance, but they did not have gait freezing. Three vibratory devices (VDs) were embedded in elastic insoles (one below the heel and two below the forefoot areas) inserted into the shoes. Each VD operates independently and has a pressure switch that activates the underlying vibratory actuator. The VD delivered the 70-Hz suprathreshold vibration pulse upon touch by the heel or forefoot, and the vibration pulse was deactivated upon respective push-offs. Six-minute hallway walking was studied with and without S-VS. Gait characteristics were measured using the force-sensitive foot switches. The primary outcome was the stride variability expressed as a coefficient of variation (CV), a measure of gait steadiness. Secondary outcome measures were walking distance and speed, stride length and duration, cadence, stance, swing and double support duration, and respective CVs (if applicable).The walking speed (p < 0.04) and the CV of the stride interval (p < 0.02) differed between the groups and S-VS conditions. In the PD group, S-VS decreased stride variability (p < 0.002), increased walking speed (p < 0.0001), stride duration (p < 0.01), stride length (p < 0.0002), and cadence (p < 0.03). In the control group, S-VS decreased stride variability (p < 0.006) and increased gait speed (p < 0.03), but other locomotion parameters were not significantly altered.Augmented sensory feedback improves parkinsonian gait steadiness in the short-term setting. Because the suprathreshold stimulation prevented blinding of subjects, the learning effect and increased attention can be a confounding factor underlying results. Long-t
Professional terminology - a component of interoperability of cultural and with them associated contents
Miroslav Novak
Knji?nica : Revija za Podro?je Bibliotekarstva in Informacijske Znanosti , 2011,
Abstract: The author defines the term "interoperability" as the ability of information systems to interexchange data, information and knowledge. These processes can take place within a field or among different professional areas. One of the preliminary conditions for successful implementation of these processes is the establishment of successful communication based on consistent professional terminology. The author exposes some basic archival professional terms defined in the current Slovenian archival legislation and professional standards. He stresses some semantic problems of implementation of these terms in different fields. In his opinion terminological deficiencies must be coordinated if we want to achieve long-term sustainability and usability of the cultural contents in the electronic environment. Otherwise these problems can represent a serious threat of the expected interoperability realization.
On archiving of web sites and the problems of their keeping, preserving and using
Miroslav Novak
Knji?nica : Revija za Podro?je Bibliotekarstva in Informacijske Znanosti , 2002,
Abstract: Web sites are defined as part of the cultural heritage. They are systematised in frame of electronic documents and appear in different contexts. From the evaluation point of view, we can realise that not only are contents important, but also the esthetical, communicational and other elements, which have direct influence on the level of the formation of inter-human communication in modern society, are significant as well. This is also the main reason why certain web sites must be kept and preserved through longer periods, others however should be archived with wholeness of contexts, in which they had been established or had operated.
The Highway Razdrto-Diva a-Se ana and its In uence upon the Groundwater on Kras (Karst)
Du?an Novak
Geologija , 1992,
Abstract: The future highway Razdrto-Diva a-Se ana will cross the area of intense karstification and the narrow district of the underground course of the Notranjska Reka.The karstic groundwater flows from various directions towards the Timava near Nabre ina and towards the pumping station of the Kras Water Supply System at Brestovica.The influences from the highway area can reach the Timava springs within 11days. The adequate protection has to be forseen in order to prevent the pollution of the karst underground waters.
Underground waters in Kamnik and Savinja Alps
Du?an Novak
Geologija , 1995,
Abstract: Dye-tracing tests in the region of the alps Velika planina and Mala planina have shown that the major part of the region drains towards the spring of the Lu nica at Podvolovljek where is also a small fish farm. As to the water level, the marginal and central parts also drain into the stream Lu ka Bela or the springs at Volovljek.Quite interesting is the high-mountain plateau Ve a, a karstified territory surrounded by the valleys Robanov kot and Podvolovljek, as well as the tributary area of the stream Kamni ka Bistrica. Here there is every indication of the deep runoff into the springs above Lu e, the spring Pe ovski izvir, the temporary springswhich are close to the stream Savinja and into the unknown springs in the gorge below the rocky needle Igla. With regard to the water level, the higher parts of the massif can drain towards the valleys Robanov kot, Podvolovljek and Kamni ka Bistrica.The tributary area of the Bistrica is quite well known, too. It has been discovered that the area of the saddle Kamni ko sedlo drains towards the springs of the Savinja. The territories of the saddle Kokrsko sedlo, the alps Dolge njive and Kalce drain into the spring Studenci below Mokrica.
Scythian beds in the To ko elo area (Slovenia)
Matev? Novak
Geologija , 2001,
Abstract:
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