scholarly journals Experience in Teaching Ophthalmoscopy on the Ophthalmosim Simulator

2021 ◽  
Vol 1 (3) ◽  
pp. 180-181
Author(s):  
V. V. Bakutkin ◽  
I. V. Bakutkin ◽  
V. S. Akopyan ◽  
N. S. Semenova ◽  
Zh. A. Akopyan ◽  
...  

It is possible to increase the effectiveness of teaching ophthalmoscopy using simulators. The experience of using ophthalmoscopy on the Ophthalmosim simulator allows you to make training close to the real process of ophthalmoscopic examination. At the same time, the possibilities of assessing the level of preparedness of a doctor for ophthalmoscopy, including in pediatric practice, have been implemented.

Author(s):  
Inbal Shani ◽  
Neima Brauner ◽  
Coleman B. Brosilow

IMC controller design for a process is based on choosing a mathematical model that describes the real process. The mathematical model describing such process is often not unique because the real variables of the process can vary within an interval. In such cases the performance of the control system varies, possibly substantially, as process parameters change. To limit such performance variations, we have developed an algorithm for choosing the model gains and the filter time constants of the IMC controller, to minimize the amount of interaction between outputs due to set point changes and disturbances for multivariable decoupled control systems. Some examples illustrate the algorithm.


2020 ◽  
pp. 030981682093229
Author(s):  
Tomás Friedenthal

The question of the reproduction of money material is a crucial feature in the investigation of the cycle of the total social capital that Marx tackled in the context of simple reproduction analysis in Part Three of Capital II. However, his inquiry was left unfinished, so the problem remained ultimately unsolved. This unsettled character was first identified by Luxemburg and later by Grossman. Sandemose attempted to reconstruct the ‘missing fragment’ of Marx’s investigation, where the analysis of the reproduction of the constant capital of gold producers should have been accomplished, alleging that its absence contributed to keep out of sight a central problem addressed there by Marx: that is, ‘the problem of the excess money necessary for the passage from simple reproduction to accumulation’. Sandemose claims also to have accurately reconstructed the passage, attaining a definite solution to the problem that Marx left unanswered. This article shows that both allegations are completely unwarranted. First, it demonstrates that under simple reproduction assumptions there is actually no (net) hoard formation (‘excess money’), in spite of Sandemose’s claim. This also entails a critique of Marx’s conclusions. As a corollary, Sandemose’s thesis that the central problem Marx addressed there was that of the ‘excess money’ needed for accumulation proves to be untenable. Second, the article also demonstrates that Sandemose’s reconstruction of Marx’s ‘missing fragment’ is fundamentally flawed, offering at the same time a consistent alternative. By this means, the investigation initiated by Marx is finally completed. As a result, and beyond its outward polemic character, this article actually renders an ideal (i.e. in thought) simple reproduction of the real process of reproduction of the total social capital, where replacement of the money material is fully taken into account.


Author(s):  
Andrea Elekes ◽  
Roland Nagy ◽  
László Bartha ◽  
Árpád Vágó

This paper considers anionic and nonionic surfactants, as candidates for crude oil production by enhancement applications. In this study some colloidal properties of surfactants were tested by conventional and new test methods. The oil in water type emulsions have great importance in the petroleum industry. The stability of crude oil in water emulsions are investigated in a wide range of physical and chemical circumstances. Investigations at 10 bar are needed to get knowledges on the real conditions of the given petroleum exploration processes. A special glass cell was used for the tests of the mixtures various crude oil-water emulsions under hydrocarbon gas atmosphere and for the oil disclapement efficiency. Based on the experimental results it was found that emulsifying capacity was changed significantly by the real process conditions. The decrease of the density of hydrocarbon phase was contributed to the overall reduction in the efficiency of emulsifiers also occurred. Based on the experimented data it is supported to pay more attention to apply the real test conditions or approximate the real values.


1998 ◽  
Vol 35 (02) ◽  
pp. 418-426 ◽  
Author(s):  
Toshinao Nakatsuka

We introduce the concept of the absorbing process for analysing a state process. Our aim is to show the existence of the absorbing process with probability one. This process is shown to be stationary, asymptotically stationary, periodic or a.m.s., if the input distribution has such properties. The real process is absorbed into this process so that its stability and some other properties are easily derived.


Author(s):  
Ivan de Jesus CERRITO-TOVAR ◽  
Adriana Paulina VALDES-MEDRANO ◽  
Oscar Enrique GARCIA-DUARTE ◽  
Héctor HUERTA-GÁMEZ

In this work, they going to use a foundry simulation software to compare the virtual vs real results and try to reduce the time of the real process in the foundry area. In the real process they work with the re-engineering process of the pistons, first they take the original element and take the physical properties (length, width, thicknesses, etc.), after make a cast design and is assigned some parameters for the process, planning the process to make a test, after the casting process it goes to the machining process and finally the final inspection says if all the process during the tests is correct, if not, we need to take others parameters or casting design. With this project is going to be possible to save time in the foundry area and make a virtual process to see the result and change all the necessary things to have a perfect process.


2020 ◽  
Vol 10 (14) ◽  
pp. 4692
Author(s):  
Bundit Kottititum ◽  
Thongchai Srinophakun ◽  
Niwat Phongsai ◽  
Quoc Tri Phung

Pressure swing adsorption (PSA) appears to be an effective technology for biogas upgrading under different operating conditions with low greenhouse gas emissions. This study presents the simulation of biomethane adsorption with the adsorption bed filled with a carbon molecular sieve (CMS). A six dual-bed six-step PSA process was studied which produced a high purity of biomethane. The design of the adsorption bed was followed by the real process of which the biomethane capacity was more than 5000 Nm3/h. For the adsorbent, a CMS-3K was used, and a biomethane gas with a minimum 92% purity was produced at 6.5 bar adsorption pressure. To understand the adsorption characteristics of the CH4 and CO2 gases, the Langmuir isotherm model was used to determine the isotherm of a mixed gas containing 55% CH4 and 45% CO2. Furthermore, the experimental data from the work of Cavenati et al. were used to investigate the kinetic parameter and mass transfer coefficient. The mass transfer coefficients of two species were determined to be 0.0008 s−1 and 0.018 s−1 at 306 K for CH4 and CO2, respectively. The PSA process was then simulated with a cyclic steady state until the relative tolerance was 0.0005, which was then used to predict the CH4 and CO2 mole fraction along the adsorption bed length at a steady state. Moreover, the optimal conditions were analyzed using Aspen Adsorption to simulate various key operating parameters, such as flowrate, adsorption pressure and adsorption time. The results show a good agreement between the simulated results and the real operating data obtained from the company REBiofuel. Finally, the sensitivity analysis for the major parameters was presented. The optimal conditions were found to be an adsorption pressure of 6 bar, an adsorption time of 250 s and a purity of up to 97.92% with a flowrate reducing to 2000 Nm3/h. This study can serve as a commercial approach to reduce operating costs.


PEDIATRICS ◽  
1981 ◽  
Vol 68 (4) ◽  
pp. 593-593
Author(s):  
Maurice Ross

article by Reisinger and Bires entitled "Anticipatory Guidance in Pediatric Practice"1 and Hoekelman's commmentary, "Got a Minute,"2 in the December 1980 issue of Pediatrics offer a challenge to the practi perician. The real issue may be whether or not time at a specific visit is an appropriate parameter for measuring anticipatory guidance. Does every patient require anticipatory guidance at every visit? Perhaps one should consider well-child visits as rituals that afford pediatricians an opportunity to assess the need for anticipatory guidance and offer it when indicated. There are numerous methods of rapidly assessing patients' needs. These include measurements of height, weight, and head circumference plotted on growth charts; health questionnaires that include review of systems, emotional problems, and school performance; and developmental lag check lists such as the Denver Prescreening Developmental Questionnaires.


2021 ◽  
Vol 66 (1) ◽  
pp. 49-66
Author(s):  
Cristian Bodea

"The paper approaches acting from a phenomenological and psychoanalytic point of view. It sheds light on the intrinsic (i.e., invisible) resorts involved when someone is playing a role – or, better yet, assumes a role. In order to make these mechanisms visible, the paper relies on the premise that acting always involves an act. Using the Lacanian theory of acts, I demonstrate that there is a real process taking place when assuming a role, namely when the subject needs to objectify himself. This process can be traced back as far as the “time” of a pre-existent gaze. The aim of the paper is to substantiate the idea that it is necessary for the gaze to enter a dialectics in order for the subject to find its objective place. For illustration, two works of art are used: the performance The Artist is Present by Marina Abramović and the movie A Woman Under the Influence by John Cassavetes. Keywords: act, desire, gaze, objectify, the Other, presence without assignable present, the Real, (in)visible."


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