26 research outputs found
Julius Rodenberg (1831-1914) 19th century
No full textThree quarter view of Rodenberg in formal dress. Name and printer information printed below the portrait.Digital imageJulius Rodenberg (June 26, 1831-July 11, 1914) was a German Jewish poet and author
The effect of A* pathfinding characteristics on the path length and performance in an octree representation of an indoor point cloud
No full textThis thesis presents a new workflow for path finding through an octree representation of an indoor point cloud. I applied the following steps: 1) the point cloud is processed so it fits best in an octree; 2) during the octree generation the interior empty nodes are identified and further processed; 3) for each interior empty node the distance to the closest non empty node directly under it is computed, this can be used as constraint in path finding; 4) a network graph is computed with the connectivity of all interior empty nodes; 5) a collision avoidance system is pre-processed in two steps: firstly the clearance of each empty node is computed, and secondly the maximal crossing value between two empty neighbouring nodes is computed. 6) the A* path finding algorithm is conducted. The A* uses the interior empty nodes and the network graph to find a path. Finally, benchmark test were conducted to identify the effect of octree operators and A* operations on the path length and computation time. The A* path finding computation time is positively effected by: firstly, pre-processing a network graph, using a Manhattan distance and by keeping the octree depth to a minimum. The path length is positively influenced by: extending the path connectivity, by using an Euclidean distance type and by increasing the octree depth. Although, the octree depth depends on the minimal and maximal spatial resolution needed for path finding. And this is dependant of the size and orientation of the point cloud. By pre processing a point cloud the spatial resolution can be increased.Architecture and The Built EnvironmentUrbanismGeomatic
Organizing the Reconstructional Works of the Pre-Waiting Areas for Non-Schengen Passengers in Tallinn Airport
No full textKäesoleva lõputöö eesmärk oli koostada Tallinna Lennujaama Non-Schengeni eelootealade
rekonstrueerimise ehitustööde organiseerimise kava ehituse tellija esindaja vaates.
Lähteandmetes selgitati põhjalikult Tallinna Lennujaamas teostatavate tööde puhul eritingimusi ja
nõudeid nende läbiviimisel. Samuti tutvustati Lennujaama koordineerimiskeskust ning selle seost
lennujaamas teostatavate ehitustegevustega. Töös kirjeldati lennujaama kinnisel alal töötamise korda,
läbipääsulubade korda ning võrreldi lennujaama suletud alal ehitamise tingimusi tavaolukorra
ehitustingimustega.
Autor tutvustas Tallinna Lennujaama reisiterminali ümberehitatava osa projektlahendust.
Lühiülevaade tehti kõikidele projektiosadele. Lõputöö majandusosas toodi välja ehituskulude
maksumus, mis oli ligi 2,6 miljonit eurot ning vastavalt eelarve kululiikide kaupa leiti ka eelarve
osakaalud. Arvutustest selgus, et ruutmeetri hinnaks kujunes 2224,83 eurot / m2
. Ehituse
organiseerimise kulude maksumuseks oli eelarvetabelis kokku 268 800 eurot, mis moodustas 10,35%
kogu ehituseelarvest. Ehituse organiseerimise kulude analüüsimisel jõuti järeldusele, et lennujaama
eritingimusi silmas pidades, olid ehituse organiseerimise kulud, mis moodustasid 1,7% kogu
maksumusest, keskmisest kallimad. Samas leiti ka, et kulude kokkuhoiukohti ei esinenud.
Lõputöö teises osas koostati ehitustööde üldplaan, koondkalendergraafik ja kaks tehnoloogilist kaarti.
Ehitustööde üldplaani seletuskirjas kirjeldati ehitusplatsi asukohta lennujaama territooriumil koos
objekti planeerimisloogikaga. Teostati ehitusaegse veevarustuse torustiku dimensioneerimine ning
koostati ehituse elektrivajaduse arvutused koos jaotuskilbi peakaitsme määramisega. Arvutustest
selgus, et vajalik peakaitse suurus ehituse läbiviimiskeks on 3 x 80 A. Ehitusplatsi üldplaani
graafilises osas koostati üldplaani joonis koos piirangualadega ning liiklusskeemidega ehituplatsi
teenindamiseks.
Koondkalenderplaanis kirjeldati ehitustööde tegevusi koos ajalise täpsustusega ning koostati
tööjõuvajaduse graafik. Graafikust selgus, et kõige suurem samaaegselt objektil töötavate inimeste
hulk oli sügisel, kui teostati sisetöid ja tehnosüsteemide töid. Kalendergraafikust selgus, et kogu
ehitustööde teostamise aeg oli planeeritud 209 tööpäeva ning ehitustööd ette nähtud lõpetada 2024.a.
jaanuari lõpus. Kasutusloa menetluseks oli graafiku järgi planeeritud kaks kuud, kasutusloa
väljastusaeg ette nähtud märts 2024.a.
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Tehnoloogilised kaardid koostati Non-Schengen eelootealade ümberehitustööde kõige keerulisemate
osade – lammutustööde ja betoonitööde kohta. Mõlema tehnoloogilise kaardi seletuskirjas kirjeldati
teostatavaid töid ning määrati tööde teostamiseks vajalik isikkoosseis. Lammutustööde seletuses
määrati ära täpne utiliseerimise plaan ning kava, sest olenevalt lammutustööde etappidest, muutus
ehituskonteinerite kasutuskord. Betoonitööde tehnoloogilise kaardi seletuskirjas koostati kõige
suurema haardeala põranda betoneerimistööde jaoks vajaminevate veokite arvutus. Graafilises osas
koostati ümberehitustööde jaoks lennuohutuse vaatest kõige olulisemad joonised – tööde teostamise
järjekord, liiklusskeemid ja seadmete paigutustööde tegemise ajal. Samuti määrati betoneerimistööde
aegsed piirangualad ning joonisel näidati teekonnad nii ehituse kui lennuliikluse teenindamiseks
tööde ajal.
Lõputöö viimases osas kirjeldati töö- ja tuleohutuse plaani koos põhjaliku seletusega töötajate
olmetingimuste tagamise kohta ehitusplatsil.
Keskkonnakaitse kavas tutvustas autor Tallinna Lennujaama tegevusi ning eesmärke
süsinikuneutraalsuse saavutamisel. Autor kirjeldas tegevusi, mis AS Tallinna Lennujaam oli juba
aastaks 2023 ära teinud ning millised tegevused olid planeeritud tulevaste aastate jaoks.
Lõputöö koostamine oli autori jaoks väga hea võimalus objekti põhjalikuks projektdokumentatsiooni
läbitöötamiseks ning andis hea kogemuse ära lahendada kõige ohtlikumate tööde, nagu
lammutustööde ja töötavas reisiterminalis betoonitööde planeerimine.Organizing the Reconstructional Works of the Pre-Waiting Areas for Non-Schengen Passengers in
Tallinn Airport
The aim of this thesis was to create an organizational plan for the construction works of the Non-
Schengen precursor areas at Tallinn Airport from the perspective of the client's representative. The
initial data provided a detailed explanation of the special conditions and requirements for carrying
out the works at Tallinn Airport. The Airport Coordination Center and its connection to the
construction activities at the airport were also introduced. The thesis described the procedures for
working in the restricted area of the airport, the access permit system, and compared the conditions
for building in the closed area of the airport with the standard construction conditions.
The author presented the design solution for the renovated part of Tallinn Airport's passenger
terminal, providing a brief overview of all project components. The economic part of the thesis
outlined the cost of construction, which amounted to approximately 2.6 million euros. The budget
breakdown by cost items was also determined. The calculations revealed that the cost per square
meter was 2,224.83 euros. The total cost of organizing the construction, as indicated in the budget
table, was 268,800 euros, accounting for 10.35% of the entire construction budget. Analyzing the
costs of organizing the construction, considering the airport's special conditions, it was concluded
that the organizing costs, which represented 1.7% of the total cost, were higher than the average.
However, no cost-saving opportunities were found.
The second part of the thesis included the general construction plan, master schedule, and two
technological maps. The explanatory note of the general construction plan described the location of
the construction site within the airport premises and its planning logic. The sizing of temporary water
supply pipes during construction and calculations of electrical demand, including the determination
of the main switchboard's main fuse, were performed. The calculations indicated that a 3 x 80 A main
fuse was required for the construction phase. The graphical part of the general construction plan
included a plan drawing with restricted areas and traffic schemes for servicing the construction site.
The master schedule described the construction activities with a time frame and presented a labor
requirement graph. The schedule revealed that the highest number of people working simultaneously
on-site would be during the autumn, when interior and technical system works were planned. The
total duration of the construction works was planned for 209 working days, with a projected
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completion date at the end of January 2024. The schedule allocated two months for the use permit
procedure, with the issuance of the use permit expected in March 2024.
Technological maps were prepared for the most complex parts of the Non-Schengen precursor areas'
reconstruction: demolition works and concrete works. The explanatory notes of both technological
maps described the respective works and specified the required personnel. The demolition works'
explanation included an exact disposal and utilization plan since the usage of construction containers
varied depending on the demolition stages. In the explanatory note of the concrete works'
technological map, calculations were made for the number of vehicles required for pouring the
concrete floor in the largest working area. In the graphical part, the most crucial drawings from the
perspective of aviation safety were provided, including the sequence of works, traffic schemes, and
equipment placement during the construction activities. The drawings also indicated the restricted
areas during concrete pouring and depicted the routes for construction and air traffic during the works.
In the final part of the thesis, a work and fire safety plan was described, providing a detailed
explanation of ensuring the workers' living conditions on the construction site. The environmental
protection plan introduced the activities and goals of Tallinn Airport in achieving carbon neutrality.
The author described the actions already taken by AS Tallinn Airport by 2023 and the planned
activities for future years.
The compilation of this thesis provided the author with an excellent opportunity to thoroughly review
the project documentation and gain valuable experience in planning the most hazardous works, such
as demolition and concrete
Indoor A* Pathfinding through an Octree Representation of a Point Cloud
No full textThere is a growing demand of 3D indoor pathfinding applications. Researched in the field of robotics during the last decades of the 20th century, these methods focussed on 2D navigation. Nowadays we would like to have the ability to help people navigate inside buildings or send a drone inside a building when this is too dangerous for people. What these examples have in common is that an object with a certain geometry needs to find an optimal collision free path between a start and goal point.This paper presents a new workflow for pathfinding through an octree representation of a point cloud. We applied the following steps: 1) the point cloud is processed so it fits best in an octree; 2) during the octree generation the interior empty nodes are filtered and further processed; 3) for each interior empty node the distance to the closest occupied node directly under it is computed; 4) a network graph is computed for all empty nodes; 5) the A* pathfinding algorithm is conducted.This workflow takes into account the connectivity for each node to all possible neighbours (face, edge and vertex and all sizes). Besides, a collision avoidance system is pre-processed in two steps: first, the clearance of each empty node is computed, and then the maximal crossing value between two empty neighbouring nodes is computed. The clearance is used to select interior empty nodes of appropriate size and the maximal crossing value is used to filter the network graph. Finally, both these datasets are used in A* pathfinding.OLD Department of GIS TechnologyUrban Data Scienc
Lead-Acid Battery Manufacture Process Waste Water Treatment
No full textLead acid batteries have been manufactured for well over 50 years but there has been very little research on process waste water treatment. Waste water effluent criteria required only neutralization and sedimentation of process waste water. Recently, the effluent criteria have been increasingly stringent with a low maximum lead and sulfate concentration. This paper reports on the research and development work done by one battery company and the author to develop a waste water treatment process to meet the effluent requirements
Influence of the helicopter environment on patient care capabilities: Flight crew perceptions
No full textFlight crew perceptions of the effect of the rotary wing environment on patient care capabilities have not been subject to statistical analysis. We hypothesized that flight crew perceived significant difficulties in performing patient care tasks during air medical transport. A survey instrument was distributed to a convenience sample of flight crew members from twenty flight programs. Respondents were asked to compare the difficulty of performing patient care tasks in rotary wing and standard (emergency department or intensive care unit) settings. Demographic data collected on respondents included years of flight experience, flights per month, crew duty position, and primary aircraft in which the respondent worked. Statistical analysis was performed as appropriate using Student's t-test, type 111 sum of squares, and analysis of variance. Alpha was defined as p is less than or equal to .05. Fifty-five percent of programs (90 individuals) responded. All tasks were rated significantly more difficult in the rotary wing environment. Ratings were not significantly correlated with flight experience, duty position, flights per month, or aircraft used. We conclude that the performance of patient care tasks are perceived by air medical flight crew to be significantly more difficult during rotary wing air medical transport than in hospital settings
Sexuality and Affection among Elderly German Men and Women in Long-Term Relationships: Results of a Prospective Population-Based Study
No full textThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.The study was funded by the German Federal Ministry for Families, Senior Citizens, Women and Youth (AZ 314-1722-102/16; AZ 301-1720-295/2), the Ministry for Science, Research and Art Baden-Württemberg, and the University of Rostock (FORUN 989020; 889048)
