3D-Modeling of the Distribution of Welding Aerosol Nano- and Microparticles in the Working Area

2017 ◽  
Vol 13 ◽  
pp. 232-238 ◽  
Author(s):  
Konstantin Yu. Kirichenko ◽  
Vladimir A. Drozd ◽  
Alexander V. Gridasov ◽  
Sergei P. Kobylyakov ◽  
A.S. Kholodov ◽  
...  
Keyword(s):  
Disperse System ◽  
3D Modeling ◽  
Morphological Analysis ◽  
3D Model ◽  
Maximum Density ◽  
Welding Fumes ◽  
Aerosol Cloud ◽  
Gaseous Component ◽  
First Results ◽  
Long Time

The first results of the research of the distribution of welding aerosol nano- and microparticles in the working area based on substance and morphological analysis are presented in the paper. A 3D-model of the welding aerosol cloud demonstrating the distribution of nano- and microparticles in the working area of the welder was created using the granulometric data of the samples. The most dangerous area with maximum density of nano- and microparticles of welding fumes was singled out: 1.3 m in height and 5 meters in all directions.Welding aerosol is a disperse system in which the solid component of the welding aerosol (SCWA) acts as the phase, and the mixture of gases (gaseous component of welding aerosol, or GCWA) – as the medium. SCWA stays suspended in the air for a long time spreading far beyond the working area of a welder [1].The aim of this work was to create a 3D-model of a welding aerosol cloud, demonstrating the spread of nano- and microparticles of welding aerosol in the working area of a welder. The 3D model was created using granulometric data of samples collected by the author’s method.

ANALISIS MODEL 3D DATA GAYA BERAT DALAM KEGAGALAN PEMBORAN SUMUR RESERVOAR MINYAK DI AREA X

2020 ◽  
Vol 2 (2) ◽  
pp. 62-68
Author(s):  
Ahmad Jahrudin ◽  
Pradityo Riyadi
Keyword(s):  
3D Modeling ◽  
3D Model ◽  
Oil And Gas ◽  
Gravity Data ◽  
Production Well ◽  
Log Data ◽  
3D Data ◽  
Area X

The exploration of oil and gas, especially in Indonesia is experiencing various challenges and varying degrees of difficulty. In this research, the researcher tries to make a 3D modeling from gravity data, where the model will show a structure to determine the central coordinates for drilling. Pertamina has carried out drilling at a location in NTT and it turns out that the well does not produce oil and gas, even though the log data reads an oil showing that the area should have the prospect of producing oil, but the wells that have been drilled do not show any oil or gas, therefore the researchers tried to make a 3D model determine the structure around the production well. In this research, it was seen that the area of the previous drilling point had deviated from the top of the up dome and it was also seen in this structure that the area was deviated by about 3 kilometers and depth must exceed 526 m, the researcher concluded that the drilling point must be at X, Y coordinates.

scholarly journals Dynamic modeling of tunnel survey spatiotemporal data

2014 ◽  
Vol 20 (2) ◽  
pp. 354-375
Author(s):  
Xiaolong Li ◽  
Jiansi Yang ◽  
Bingxuan Guo ◽  
Hua Liu ◽  
Jun Hua
Keyword(s):  
Survey Data ◽  
Cross Section ◽  
Cross Sections ◽  
3D Modeling ◽  
3D Model ◽  
Three Dimensional ◽  
Spatiotemporal Data ◽  
Excavation Process ◽  
Special Cases ◽  
Time Stamps

Currently, for tunnels, the design centerline and design cross-section with time stamps are used for dynamic three-dimensional (3D) modeling. However, this approach cannot correctly reflect some qualities of tunneling or some special cases, such as landslips. Therefore, a dynamic 3D model of a tunnel based on spatiotemporal data from survey cross-sections is proposed in this paper. This model can not only playback the excavation process but also reflect qualities of a project typically missed. In this paper, a new conceptual model for dynamic 3D modeling of tunneling survey data is introduced. Some specific solutions are proposed using key corresponding technologies for coordinate transformation of cross-sections from linear engineering coordinates to global projection coordinates, data structure of files and database, and dynamic 3D modeling. A 3D tunnel TIN model was proposed using the optimized minimum direction angle algorithm. The last section implements the construction of a survey data collection, acquisition, and dynamic simulation system, which verifies the feasibility and practicality of this modeling method.

scholarly journals First Results from Insemination With Sex-Sorted Semen in Dairy Heifers in Macedonia

2015 ◽  
Vol 38 (1) ◽  
pp. 107-111
Author(s):  
Ljupche Kochoski ◽  
Zoran Filipov ◽  
Ilcho Joshevski ◽  
Stevche Ilievski ◽  
Filip Davkov
Keyword(s):  
Pregnancy Rate ◽  
Transrectal Ultrasound ◽  
Gestation Length ◽  
Dairy Heifers ◽  
Holstein Friesian ◽  
First Results ◽  
Long Time ◽  
The Usa ◽  
Normal Gestation ◽  
First Time

Abstract Science has been searching for a long time for a reliable method for controlling the sex of mammalian offspring. Recently, the application of specific modern cellular methodologies has led to the development of a flow cytometric system capable of differentiating and separating living X- and Y-chromosome-bearing sperm cells in amounts suitable for AI and therefore, commercialization of this sexing technology. The aim of this work was to present the first results of heifers that introduce bovine AI with sex sorted semen, for the first time in Macedonia. Insemination with sex sorted cryopreserved semen (2×106 spermatozoa per dose) imported from the USA was done at two dairy farms in ZK Pelagonija. In total, 74 heifers (Holstein Friesian) were inseminated. Inseminations were carried out in a timely manner following a modified OvSynch protocol. During the insemination, the sperm was deposited into the uterine horn ipsi lateral to the ovary where a follicle larger than 1.6 cm was detected by means of transrectal ultrasound examination. Pregnancy was checked by ultrasound on day 30 after the insemination. Overall, the average pregnancy rate in both farms was 43,24% (40,54% and 45,95%, for farm 1 and farm 2, respectively). All pregnant heifers delivered their calves following a normal gestation length (274,3 days in average) and of the 32 born calves, 30 (93,75%) were female. In conclusion, since the first results from inseminations with sex-sorted semen in dairy heifers in Macedonia are very promising, the introduction of this technique may bring much benefit to the local dairy sector. Average pregnancy rate seems similar with results obtained following ‘regular’ inseminations, notwithstanding the relatively low number of spermatozoa per insemination dose. Due to the latter, we however recommend inseminations only to be carried out by experienced technicians followinga TAI protocol and ultrasound examinations of the ovaries prior to insemination.

scholarly journals The use of 3D modeling to determine the parameters of surgical intervention for pulmonary tuberculosis

2020 ◽  
Vol 98 (6) ◽  
pp. 47-51
Author(s):  
E. A. Borodulinа ◽  
A. V. Kolsаnov ◽  
P. V. Rogozhkin ◽  
A. A. Mаnukyan
Keyword(s):  
Computed Tomography ◽  
Pulmonary Tuberculosis ◽  
3D Modeling ◽  
3D Model ◽  
Surgical Intervention ◽  
Bronchial Tree ◽  
Surgical Interventions ◽  
Color Mapping ◽  
Vascular Structures ◽  
Tomography Data

The clinical experience demonstrates the importance of 3D modeling when planning surgical intervention in patients with pulmonary tuberculosis. The 3D model was built up based computed tomography data using Avtoplan software with plug-ins for segmentation of the lung, pathological foci, vascular structures, and bronchial tree. The data obtained during 3D modeling allowed us to plan surgery and the data were fully confirmed during the operation. The 3D model with color mapping reveals syntopy, which is extremely difficult to determine using standard computed tomography and allows the wider use of minimally invasive endoscopic surgical interventions.

scholarly journals REPRESENTATION AND DIGITALIZATION OF STONE THEATRES IN EASTERN SICILY: THE PALAZZOLO ACREIDE THEATER

2019 ◽  
Vol XLII-2/W11 ◽  
pp. 475-479
Author(s):  
G. Di Gregorio
Keyword(s):  
Structure From Motion ◽  
3D Model ◽  
Southern Italy ◽  
Three Dimensional ◽  
Cultural Value ◽  
Geometric Conditions ◽  
Dense Matching ◽  
Laser Scanners ◽  
First Results ◽  
Quality And Reliability

<p><strong>Abstract.</strong> The ancient theatres in Sicily, in southern Italy and along the countries facing the Mediterranean Sea basin, constitute a reality of incomparable cultural value. Regarding the research on the ancient theatres of eastern Sicily, few studies have been recently dealt with different methodologies. In the last years some practices have been done using 3D laser scanners for the theatres of Syracuse, Taormina and Morgantina, as well as the Syracuse amphitheatre and Taormina Odeon, just obtaining very interesting results. Lately the theatre of Palazzolo Acreide (Syracuse) has been studied, with Structure From Motion (SFM) and Dense Matching methodologies. From these experience, conclusions could be drawn on the quality and reliability of the elaborations realised with the SFM methodologies. We really know that these systems are today representing one of the fastest growing areas of examination, on which several software houses are investing. The study was chosen both for the small size of the building, and for the particular geometric conditions typical of the architecture of ancient theatres. This because their three-dimensional trend varies continually in the three variables X, Y, Z. The purpose of the work was to check whether the latest releases of these systems of survey allow today more than yesterday, a rapid digitalization and representation of the enormous archaeological cultural heritage. Various software were used, to verify the practicality and operation, the choice then fell on the Zephyr of 3DFlow, kindly available by the manufacturer, whose results were quite agreeable. The possibility offered by the program of a graphical tracing of polylines on the textured 3D model, has been a considerable advantage. Therefore the results obtained by modeling and surveying of the Palazzolo Acreide theatre have been compared, with the survey of the Syracuse, Taormina and Morgantina theatre performed using 3D laser scanners. First results of the research are matter of the following work.</p>

Main Structure Design on Dual-Purpose Move-Assistant Device of Wheelchair and Crutch on SolidWorks

2012 ◽  
Vol 482-484 ◽  
pp. 2148-2152
Author(s):  
Cong Wei Yang ◽  
Hai Tao Wu ◽  
Hong Bin Liu
Keyword(s):  
3D Modeling ◽  
3D Model ◽  
Structure Design ◽  
Model Design ◽  
Work Time ◽  
Dual Purpose ◽  
Main Structure ◽  
Modeling Software ◽  
Design Requirements

Established the model of dual-purpose move-assistant device of wheelchair and crutch, using 3D modeling software SolidWorks, finished the 3D model of parts and parts assembly according to the design requirements of dual-purpose move-assistant device of wheelchair and crutch. Verified the accuracy of designing the project. With the software to carry on a 3D model design can save work time and economize the design budget, providing the theoretical feasibility of realizing the dual-purpose move-assistant device of wheelchair and crutch.

A Community Perspective on Research Software in the Hydrological Sciences 

2021 ◽  
Author(s):  
Robert Reinecke ◽  
Tim Trautmann ◽  
Thorsten Wagener ◽  
Katja Schüler
Keyword(s):  
Software Development ◽  
Scientific Progress ◽  
Open Science ◽  
Computer Engineering ◽  
Knowledge Community ◽  
Research Software ◽  
Software Engineering Process ◽  
First Results ◽  
Long Time ◽  
Access To Data

&lt;div&gt; &lt;p&gt;Software development has become an integral part of the earth system sciences as models and data processing get more sophisticated. Paradoxically, it poses a threat to scientific progress as the pillar of science, reproducibility, is seldomly reached. Software code tends to be either poorly written and documented or not shared at all; proper software licenses are rarely attributed. This is especially worrisome as scientific results have potential controversial implications for stakeholders and policymakers and may influence the public opinion for a long time.&amp;#160;&lt;/p&gt; &lt;/div&gt;&lt;div&gt; &lt;p&gt;In recent years, progress towards open science has led to more publishers demanding access to data and source code alongside peer-reviewed manuscripts. Still, recent studies find that results in hydrology can rarely be reproduced.&amp;#160;&lt;/p&gt; &lt;/div&gt;&lt;div&gt; &lt;p&gt;In this talk, we present first results of a poll conducted in spring 2021 among the hydrological science community. Therein, we strive to investigate the causes for that lack of reproducibility. We take a peek behind the curtain and unveil how the community develops and maintains complex code and what that entails for reproducibility. Our survey includes background knowledge, community opinion, and behaviour practices regarding reproducible software development.&amp;#160;&amp;#160;&lt;/p&gt; &lt;/div&gt;&lt;div&gt; &lt;p&gt;We postulate that this lack of reproducibility might be rooted in insufficient reward within the scientific community, insecurity regarding proper licencing of software and other parts of the research compendium as well as scientists&amp;#8217; unawareness about how to make software available in a way that allows for proper attribution of their work. We question putative causes such as unclear guidelines of research institutions or that software has been developed over decades by researchers' cohorts without a proper software engineering process and transparent licensing.&amp;#160;&lt;/p&gt; &lt;/div&gt;&lt;div&gt; &lt;p&gt;To this end, we also summarize solutions like the adaption of modern project management methods from the computer engineering community that will eventually reduce costs while increasing the reproducibility of scientific research.&amp;#160;&lt;/p&gt; &lt;/div&gt;

Geographical axis effects in large-scale linguistic distributions

2020 ◽  
pp. 58-77
Author(s):  
Tom Güldemann ◽  
Harald Hammarström
Keyword(s):  
Large Scale ◽  
Linguistic Diversity ◽  
Human History ◽  
Linguistic Features ◽  
Large Space ◽  
Language Groups ◽  
Comprehensive Theory ◽  
Geographical Factors ◽  
First Results ◽  
Long Time

Taking up Diamond’s (1999) geographical axis hypothesis regarding the different population histories of continental areas, Güldemann (2008, 2010) proposed that macro-areal aggregations of linguistic features are influenced by geographical factors. This chapter explores this idea by extending it to the whole world in testing whether the way linguistic features assemble over long time spans and large space is influenced by what we call “latitude spread potential” and “longitude spread constraint.” Regarding the former, the authors argue in particular that contact-induced feature distributions as well as genealogically defined language groups with a sufficient geographical extension tend to have a latitudinal orientation. Regarding the latter, the authors provide first results suggesting that linguistic diversity within language families tends to be higher along longitude axes. If replicated by more extensive and diverse testing, the authors’ findings promise to become important ingredients for a comprehensive theory of human history across space and time within linguistics and beyond.

First Report on the Publication and Conservation of the Tomb of Ramesses III in the Valley of the Kings (KV 11)

2018 ◽  
Vol 104 (1) ◽  
pp. 59-69
Author(s):  
Anke Weber
Keyword(s):  
Ancient Egypt ◽  
Historical Background ◽  
Annual Reports ◽  
Team Members ◽  
First Report ◽  
The Public ◽  
Conservation Project ◽  
First Results ◽  
Long Time ◽  
Glass Panels

The tomb of Ramesses III (KV 11) in the Valley of the Kings is one of the archaeological sites of ancient Egypt that has received very little attention from the scientific community. The tomb was open to the public for a long time and is in danger of quick deterioration. The site was closed from August 2016 until October 2017 for the installation of new walkways, glass panels, and an improved lighting system. The Ramesses III (KV 11) Publication and Conservation Project now aims to record, document, and preserve the entire tomb. This article is a first report on the planned publication and conservation of the tomb of Ramesses III (KV 11) in the Valley of the Kings. Like so many other tombs in the wadi, it presents the astonishing case of a tomb that has been known for a long time but was never thoroughly studied. In the following, we present the research aims of the newly formed Ramesses III (KV 11) Publication and Conservation Project1 as well as the preparatory work that has been undertaken by our team members. All observations and notes were made over the last six years during short campaigns, partly within the framework of a previous research project,2 which constitutes the basis of preliminary work in KV 11. The article focuses on the historical background of the tomb, its research history, including former investigators and concessions, supposed causes of destruction, suggestions for preservation, and procedures for research and documentation. We present the main problems we have to deal with at the outset of the project and describe the methods we propose to adopt. Further annual reports on the progress and first results of our work in order to preserve this important site of Egypt’s cultural heritage will follow in due course.

scholarly journals Characterization and first results from LACIS-T: a moist-air wind tunnel to study aerosol–cloud–turbulence interactions

2020 ◽  
Vol 13 (4) ◽  
pp. 2015-2033 ◽  
Author(s):  
Dennis Niedermeier ◽  
Jens Voigtländer ◽  
Silvio Schmalfuß ◽  
Daniel Busch ◽  
Jörg Schumacher ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Spatial Scales ◽  
Experimental Studies ◽  
Field Measurements ◽  
Hygroscopic Growth ◽  
Moist Air ◽  
Aerosol Cloud ◽  
Cloud Microphysical Processes ◽  
First Results ◽  
Microphysical Processes

Abstract. The interactions between turbulence and cloud microphysical processes have been investigated primarily through numerical simulation and field measurements over the last 10 years. However, only in the laboratory we can be confident in our knowledge of initial and boundary conditions and are able to measure under statistically stationary and repeatable conditions. In the scope of this paper, we present a unique turbulent moist-air wind tunnel, called the Turbulent Leipzig Aerosol Cloud Interaction Simulator (LACIS-T) which has been developed at TROPOS in order to study cloud physical processes in general and interactions between turbulence and cloud microphysical processes in particular. The investigations take place under well-defined and reproducible turbulent and thermodynamic conditions covering the temperature range of warm, mixed-phase and cold clouds (25∘C>T>-40∘C). The continuous-flow design of the facility allows for the investigation of processes occurring on small temporal (up to a few seconds) and spatial scales (micrometer to meter scale) and with a Lagrangian perspective. The here-presented experimental studies using LACIS-T are accompanied and complemented by computational fluid dynamics (CFD) simulations which help us to design experiments as well as to interpret experimental results. In this paper, we will present the fundamental operating principle of LACIS-T, the numerical model, and results concerning the thermodynamic and flow conditions prevailing inside the wind tunnel, combining both characterization measurements and numerical simulations. Finally, the first results are depicted from deliquescence and hygroscopic growth as well as droplet activation and growth experiments. We observe clear indications of the effect of turbulence on the investigated microphysical processes.

Sign in / Sign up

Export Citation Format

Share Document