scholarly journals PROBABILITY AND STATISTICAL APPROACH TO THE DESCRIPTION OF AERODYNAMIC INTERACTION OF COLLECTIVE OF INCIDENT PARTICLES WITH AIR

2016 ◽  
Vol 1 (12) ◽  
pp. 95-99
Author(s):  
Логачев ◽  
Ivan Logachev ◽  
Попов ◽  
Evgeniy Popov
Keyword(s):  
Statistical Approach ◽  
Free Stream ◽  
Aerodynamic Resistance ◽  
Dust Particles ◽  
Methods Of Calculation ◽  
Aerodynamic Interaction ◽  
Polydisperse Material ◽  
Reduce Energy Consumption ◽  
To Receive ◽  
Further Development

In the mountain industry a considerable part of technological processes are followed by loadings of bulk in various capacities and the bunker. When loading bunkers of silage type self-dumping carts the problem of knocking-out of dust from loading apertures is particularly acute especially. Work is devoted to improvement of methods of calculation of aspiration when loadings bunkers of silage type by polydisperse material. New statistical approach to the accounting of conditions of constraint on coefficient of front resistance of particles in the conditions of a free stream of the falling material is offered. When falling a free stream of material of a particle of larger fractions shade small and dust particles which aerodynamic resistance in such conditions isn´t considerable. Analytical conclusion of probability of active impact on air of the particles which are out of an aerodynamic shadow that allows to receive a technique of assessment of ezhektiruyushchy ability of a stream of particles at dust removal of bunkers of silage type has been offered. At further development of this approach a conclusion of probability of aerodynamic interaction of particles of polydisperse material is possible. The accounting of dispersion of the overloaded material will allow to calculate optimum amount of aspiration air and to reduce energy consumption of systems of aspiration.

A Statistical Approach to Ranking Similarities of Three Function Structure Groups Using Directed Graphs

2018 ◽  
Author(s):  
Briana M. Lucero ◽  
Matthew J. Adams
Keyword(s):  
Statistical Approach ◽  
Directed Graphs ◽  
Proof Of Concept ◽  
Function Structure ◽  
Fundamental Properties ◽  
Design Engineers ◽  
Functional Representation ◽  
Structure Databases ◽  
Further Development ◽  
Function Structures

Prior efforts in the study of engineering design employed various approaches to decompose product design. Design engineers use functional representation, and more precisely function structures, to define a product’s functionality. However, significant barriers remain to objectively quantifying the similarity between two function structures, even for the same product when developed by multiple designers. For function-structure databases this means that function-structures are implicitly categorized leaving the possibility of incorrect categorization and reducing efficacy of returned analogous correlations. Improvements to efficacy in database organization and queries are possible by objectively quantifying the similarity between function structures. The proposed method exploits fundamental properties of function-structures and design taxonomies. We convert function-structures into directed graphs (digraphs) and equivalent adjacency matrices. The conversion maintains the directed (function → flow → function) progression inherent to function-structures and enables the transformation of the function-structure into a standardized graph. For design taxonomies (e.g. D-APPS), graph nodes represent flows in a consistent (but arbitrary) ordering. By exploiting the directional properties of function-structures and defining the flows as the graphical nodes, the objective and standardized comparison of two function-structures becomes feasible. We statistically quantify the association between digraphs using the Pearson Product Moment Correlation (PPMC) for both within-group and between-group comparisons. The method was tested on three product types (ball thrower, food processor, and an ice cream maker) with function-structures defined by various designers. The method suggested herein is provided as a proof-of-concept with suggested verification and validation approaches for further development.

scholarly journals Development of a Flexible, Extendable, and Low-Cost Control Unit for Surface Drifters

2017 ◽  
Vol 34 (3) ◽  
pp. 669-677
Author(s):  
Andrea Giudici ◽  
Tomas Torsvik ◽  
Tarmo Soomere
Keyword(s):  
Mobile Communications ◽  
Low Cost ◽  
Control Unit ◽  
Digital Data ◽  
Operational Testing ◽  
Small Footprint ◽  
Surface Drifters ◽  
Inland Water Bodies ◽  
To Receive ◽  
Further Development

AbstractAn extensible, low-cost drifter control unit (VELELLA) design is presented, developed for use in drifters that are deployed in inland water bodies or near-coast regions. The control unit is custom built from basic components built around a small footprint microcontroller, making use of a GPS receiver for position tracking, a Global System for Mobile Communications [Groupe SpécialMobile (GSM)] radio for data transmission, and two sensor buses to handle analog and digital data generated by an arbitrary array of external sensors. A cloud-based data collection platform has been implemented to receive and store data transmitted over general packet radio service (GPRS) from the drifter. The control unit was found to perform satisfactorily in operational testing, providing data at subhertz frequency for position and temperature during extended time. However, some issues related to temporary data loss and power consumption spikes were identified, indicating that some further development of the control unit is required to achieve a production-ready platform for extensive and prolonged field operations.

Free Convective Couette flow1of1a1Dusty1Fluid1through1a Porous Medium1with1Periodic1Permeability1in1the1Absence1of Electrically Magneto Hydro Dynamic Model

2021 ◽  
Vol 58 (2) ◽  
pp. 6072-6083
Author(s):  
K. Rajesh, A. Govindarajan, M. Vidhya
Keyword(s):  
Flow Field ◽  
Dynamic Model ◽  
Analytical Solutions ◽  
Free Stream ◽  
Porous Plate ◽  
Free Stream Velocity ◽  
Dust Particles ◽  
Stream Velocity

“The purpose of this investigation stands to discuss the effects of periodic permeability on1the; free1convective flow of a dusty viscous; incompressible1fluid through a1highly1porous1channel. The porous1medium is confined by an infinite perpendicular porous plate supercilious the free stream velocity to be uniform. Analytical solutions are gained for the dusty flow field, the1temperature field, the1skin1friction and the rate1of heat1transfer. when there is an increase in mass concentration1of dust1particles, it is found that the1velocity profile of fluid and dust particles reduces.”

Spiritual dimension in palliative care from the perspective of Thai palliative caregivers

2020 ◽  
Vol 26 (2) ◽  
pp. 70-74
Author(s):  
Pilaiporn Sukcharoen ◽  
Nanchatsan Sakunpong ◽  
Kantita Sripa
Keyword(s):  
Palliative Care ◽  
Health Professionals ◽  
Terminally Ill ◽  
Self Awareness ◽  
Terminally Ill Patients ◽  
Care Health ◽  
To Receive ◽  
Further Development ◽  
Depth Interviews

Background: In Thailand, most terminally ill patients die in hospital and are looked after by health professionals. Terminally ill patients tend to receive physical care only, while in the main, spiritual care is neglected. This study aimed to explore spirituality in palliative care health professionals and spiritual leaders in the Thai Buddhist context. Method: In this qualitative case study, seven experienced palliative caregivers took part in in-depth interviews. Thematic analysis and a trustworthiness process were used to analyse the data. Findings: Three themes emerged: (1) the ability for self-awareness and faith; (2) acceptance and compassion for others; and (3) spiritual behaviour while nursing. Conclusion: The results revealed the meaning of spirituality and the necessary characteristics for spirituality in palliative care for the participants, which could serve as a basis for further development.

scholarly journals Factors of biologization of farming in the forest-steppe zone of Volga region

2020 ◽  
Vol 17 ◽  
pp. 00173
Author(s):  
Aleksandr Toigildin ◽  
Vladimir Morozov ◽  
Mikhail Podsevalov ◽  
Denis Ayupov ◽  
Irina Toigildina ◽  
...  
Keyword(s):  
Organic Farming ◽  
Steppe Zone ◽  
Volga Region ◽  
Nature Management ◽  
Forest Steppe ◽  
Modern Development ◽  
Technological Modernization ◽  
Ecological Functions Of Soils ◽  
To Receive ◽  
Further Development

The modern development of world farming was announced at the UN Conference on Environment and Development, and is connected with the biosphere paradigm of nature management (1992), which implies the priority of maintaining the ecological functions of soils and landscapes (ecologization). In agriculture, ecologization is known as “organic farming” (ecological, biological, etc.), but in Russia, “organic farming”, in its pure form (without pesticides and chemical fertilizers), has not gained momentum yet. The legislative base for this was developed only in 2019 and in the coming years it is unlikely to receive widespread distribution among representatives of agribusiness for economic, social and cultural reasons. Further development of modern agribusiness is possible due to technological modernization through the technological upgrading by means of a system of biologization. In this article, we have revealed the main factors and practical methods of biologization of modern farming under the conditions of the forest-steppe zone of the Volga region.

scholarly journals First-Time Fathers’ Experience of Support from Midwives in Maternity Clinics: An Interview Study

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
L. Huusko ◽  
S. Sjöberg ◽  
A. Ekström ◽  
E. Hertfelt Wahn ◽  
S. Thorstensson
Keyword(s):  
Parental Education ◽  
Qualitative Content Analysis ◽  
Professional Support ◽  
Clinical Implications ◽  
Expectant Fathers ◽  
Open Question ◽  
First Time ◽  
To Receive ◽  
Further Development ◽  
Maternity Clinics

Background. Research shows that first-time fathers want to take part in preparation for birth and parenthood but they describe being excluded by health professionals. Aim. The aim of this study was to illustrate first-time fathers’ experiences of support from midwives in maternity clinics as a step in the validation of “The Father Perceived-Professional-Support” (The FaPPS) scale. Methods. A qualitative content analysis with an inductive and deductive approach was used; seven first-time fathers were strategically selected and interviewed. In the inductive part the following open question was asked: “How did you perceive the support from the antenatal midwife/midwives?” In the deductive part, the fathers were asked to respond to the FaPPS scale, in order to receive their thoughts and understanding of the scale, inspired by the “Think-aloud” method. Findings. The inductive results showed two main categories: Experience of not knowing what support they needed and Experience of being excluded. The fathers found support from other fathers in parental education classes, but they lack time to discuss. Overall it seems as if the fathers answered both from their own perspective and from the mothers’ perspective. This was not evident in the deductive results. The FaPPs scale should therefore include professionals’ ability to strengthen social support from other first-time fathers and professionals’ ability to offer support to the mother. Conclusion and Clinical Implications. The fathers experienced exclusion both by themselves and also by midwives. Midwives should offer both parents the opportunity to pose questions. It is important for expectant fathers that time for discussion is planned in parental education classes. The FaPPS scale is useful but needs further development. Parts of our result are in line with earlier research, for decades; therefore it is necessary to focus more on support for fathers.

New Focus on Gearbox Condition Monitoring for Failure Prevention Technology

2013 ◽  
Vol 588 ◽  
pp. 184-191 ◽  
Author(s):  
Walter Bartelmus
Keyword(s):  
Condition Monitoring ◽  
Degradation Process ◽  
Dust Particles ◽  
Oil Contamination ◽  
Failure Prevention ◽  
Operation Conditions ◽  
Frictional Wear ◽  
Rolling Elements ◽  
Oil Purification ◽  
Further Development

Condition monitoring is a tool for detection of faults and failure prevention. Fault andfailure are regarded as inevitable during the machine operation as the process of wear and theprocess of degradation. The question is, if one can influence the wear and degradation process,using condition monitoring. The paper will present technology which demonstrates that the use ofthe proper method can influence the wear and machine degradation process, using proper conditionmonitoring techniques and knowing scenarios of wear and degradation process. In the discussionpresented in the paper as a prerequisite has been taken that machinery works in severe dustyenvironment and varying operation conditions. It has been pointed that degradation process is notjust simply development of one fault. Most research for developing technology for conditionmonitoring is concentrated on one fault development. If one considers condition monitoring for acrack and brakeage of a tooth in gearbox, one should take in consideration that tooth crack andbrakeage is the result of several events, like rolling elements bearing frictional wear, which causesecondary misalignment of shaft and gears. The frictional wear is caused by dust particles whichget into oil from the environment in which a gearbox is operating. To avoid an influence ofcontaminated oil, contamination proactive technology should be used for the assessment of thedegree of contamination and the decision on oil purification or change should be taken. The wholeprocess connected with a gearbox condition change (wear and degradation process) shall bedescribed in the paper. The oil purification or its replacement extends the live of gearboxes butlong live of a gearbox, even with very little contamination causes some frictional wear of bearingsand finally secondary misalignment. To avoid further development of degradation process propertechnology should be used. There is a need to measure the degree of misalignment and makedecision on bearings replacement, in order to avoid further gearbox degradation, like teeth scuffingwhich may leads to crack initiation.

Predicting early relapse in patients with BRAFV600E melanoma with a highly sensitive blood BRAF assay.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 8516-8516 ◽  
Author(s):  
Ryan J. Sullivan ◽  
Donald P. Lawrence ◽  
Keith T. Flaherty ◽  
David F. McDermott ◽  
Julie Aldridge ◽  
...  
Keyword(s):  
Alternative Therapy ◽  
Stage Iv ◽  
Peripheral Blood Lymphocytes ◽  
Response To Therapy ◽  
Highly Sensitive ◽  
Pre Treatment ◽  
Time Of Presentation ◽  
To Receive ◽  
Further Development ◽  
Braf Mutant

8516 Background: Many patients (pts) with metastatic melanoma (MM) who progress on BRAF inhibitors (BRAFi) develop rapidly progressive disease (PD) which is difficult to manage. Identification of an early marker of PD may allow for therapeutic intervention prior to clinical deterioration. We have developed a highly sensitive and inexpensive assay in our laboratory which can detect as little as 1 BRAFV600E mutant melanoma cell in 400,000 peripheral blood lymphocytes (PBL). We aimed to determine the utility of our assay as a tool to follow pts with BRAF mutant MM who are being treated with a BRAFi. Methods: Every pt had a BRAFV600E mutation detected from a tumor sample in a CLIA-approved laboratory prior to commencing BRAFi therapy. 20 pts with stage IV BRAFV600E MM underwent serial venopunctures before and every 4 weeks during treatment with a BRAFi. BRAFV600E level was quantified using our proprietary assay (Panka et al Melanoma Research 2010). Serial BRAFV600E levels were generated for every pt and normalized to the pre-treatment value. BRAFV600E level was then correlated with response to therapy and PD. Results: BRAFV600E was detected in the PBL of each pt. To date, 10 pts have had BRAFV600E levels quantified at 3 or more time points (data for all 20 pts will be available at time of presentation). Relative BRAFV600E levels reduced by half following the first and second cycles of treatment in 7 pts, which correlated with disease regression in each pt. Following the third cycle of treatment, the relative BRAFV600E levels varied greatly with a subset of pts having continued suppression while others having a rise in their BRAFV600E levels. In each pt with PD, the BRAF assay showed an increase > 4 wks in advance of clinically or radiographically defined PD. Conclusions: Our assay is able to quantify changes in BRAFV600E levels in the blood of pts with BRAF mutant MM receiving BRAFi therapy. In these pts, the BRAFV600E levels are reduced in the setting of initial disease regression and increase well in advance of clinical or radiographic PD. While further development is necessary, such a test could be used to identify pts who may be selected to receive alternative therapy prior to clinical or radiographic PD.

scholarly journals Tornadoes in Romania—from Forecasting and Warning to Understanding Public’s Response and Expectations

Atmosphere ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 966
Author(s):  
Simona Andrei ◽  
Meda Daniela Andrei ◽  
Mihăiţă Huştiu ◽  
Sorin Cheval ◽  
Bogdan Antonescu
Keyword(s):  
Risk Perception ◽  
General Public ◽  
Lessons Learned ◽  
Significant Progress ◽  
Tornado Warnings ◽  
Forecasting And Warning ◽  
Tornado Event ◽  
First Time ◽  
To Receive ◽  
Further Development

Significant progress in tornado research and management can be claimed over the last few decades worldwide. However, tornado forecasting and warning continue to be permanent challenges for most European national meteorological services because they require particular skills and experience. Moreover, tornado warnings may generate panic. Therefore, one can remark that the main difficulties are related to (1) forecasting the tornado genesis, and (2) finding the most efficient way to communicate to the general public the possibility of tornado occurrence. This article presents the main characteristics of two convective events that occurred in Romania in order to emphasize the similarities and disparities between the tornado event (30 April 2019) and the non-tornado event (6 May 2019), from the warning perspective. Further, we investigate, for the first time in Romania, the general public’s comprehension, risk perception and reactions regarding the tornado events. The survey performed in 2020 emphasized that the Romanian public is able to recognize tornadoes (60%), understand the risks (over 80%), can manage the panic (over 70%), and is rather desirous to receive clear (over 90%) and real-time (95%) tornado warnings. The lessons learned may support the further development of tornado forecasting and warning procedures, and foster the public’s awareness related to tornado events.

Researches towards establishing a theory of the dispersion of light

1837 ◽  
Vol 3 ◽  
pp. 458-459
Keyword(s):  
Essential Oils ◽  
Tabular Form ◽  
Methods Of Calculation ◽  
General Approximation ◽  
The Subject ◽  
Balsam Of Peru ◽  
To Receive ◽  
Dispersion Of Light

The author here prosecutes the inquiry on the dispersion of light which was the subject of his former papers published in the Philosophical Transactions for 1835 and 1830, extending it to media of higher dispersive powers, which alford a severer test of the accuracy of M. Cauchy’s theory. He explains his methods of calculation and the formulae on which his computations are founded, and which are different from those employed in his former investigations: and then states the results in a tabular form. On the whole he concludes that the formula, as already deduced from the undulatory theory, applies sufficiently well to the case of media whose dispersion Is as high as that of oil of anise-seed: or below it, such as nitric, muriatic, and sulphuric acids, and the essential oils ofangelica, cinnamon, and sassafras, balsam of Peru, and kreosote. It also represents, with a certain general approximation to the truth, the indices of some more highly dispersive bodies. The author therefore considers it as extremely probable that the essential principle of the theory has some real foundation in nature. From the regularity which he finds in the deviation of observation from theory, he thinks it likely that the formula only requires to receive some further developement, or extension, in order to make it apply accurately to the higher cases, while it shall still include the simpler form which so well accords with the lower.

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