Spelling suggestions: "subject:"accessible""
1 |
Large CardinalsPechenik, Oliver 20 October 2010 (has links)
No description available.
|
2 |
Measuring inaccessible points in land surveying and analysis of their uncertaintyZhuo, Yue January 2012 (has links)
No description available.
|
3 |
Do the availability and accessibility of soil saccharides and nutrients vary with the phenology of Acer rubrum and Lonicera maackii?McMillan, Cameron Kyle January 2015 (has links)
No description available.
|
4 |
Hipokampální kódování pozic nepřístupných objektů / Hippocampal coding of positions of inaccessible objectsHrůzová, Karolína January 2020 (has links)
The survival of the animals depends on their ability to memorize locations and to use behavioral spatial navigation strategies. The crucial structure for this type of behavior and memory is the hippocampus, by its ability to create a cognitive map. In this structure, there are specialized pyramidal cell called place cells. They respond by their complex firing pattern to specific animal's location in the environment. Even though many studies have investigated the role of hippocampal pyramidal cells in spatial navigation and object position discrimination, their function during inaccessible object position discrimination is not yet clarified. In our experiment, rats were trained in a behavioral task to discriminate between rewarded and nor- rewarded positions of object located in an inaccessible space. We investigated the role of individual hippocampal cells during this task by single neuron electrophysiology. The first aim of this study was to decide which of two configurations of objects presented on a computer screen during spatial object discrimination task rats can discriminate easily. The second aim is to show whether and how information about the position of inaccessible objects is represented in the hippocampus using single-neuron electrophysiology. We found out, that animals did not reach...
|
5 |
Lägesosäkerhet vid mätning av dold punkt med totalstation och GNSSPersson, Patrik, Sjölén, Dennis January 2018 (has links)
En dold punkt är en punkt som inte kan mätas direkt utan måste mätas indirekt med hjälp av t.ex. Global Navigation Satellite System (GNSS) eller totalstation. Det finns ett flertal olika metoder med GNSS och totalstation som passar till olika inmätningssituationer för att mäta en dold punkt. Mätning av dolda punkter med totalstation inträffar ofta i industrimiljöer där rör och liknande hänger i vägen för totalstationens siktlinje till mätobjektet. GNSS med nätverks-realtids kinematisk (nätverks-RTK) mätning, en metod som ökar inom mätningsjobb, är en bra metod för att indirekt mäta dolda punkter utomhus där det antingen är dålig mottagning av satellitsignaler eller inte är möjligt att ställa upp en antenn över punkten. Syftet med denna studie är att undersöka hur bra lägesosäkerhet det går att uppnå för mätning av dold punkt med GNSS och totalstation och även jämföra de olika metoderna som testas. Fem olika metoder beskrivs för att kunna bestämma en dold punkts koordinater med totalstation. Bl.a. en med stång och prismor för mätning i plan och höjd, som även kommer användas i denna studie. Lägesosäkerheten 0,1 mm i både plan och höjd bör kunna uppnås med den metoden. Metoder som kan användas med GNSS och nätverks-RTK är t.ex. en rak linje och dess bäring, skärningen av två raka linjer och skärningen av två längdmätningar. Med nätverks-RTK kan mätningar uppnå en lägesosäkerhet på millimeter-nivå baserat på SWEPOS nätverks-RTK-tjänst. Det är även viktigt med tidskorrelation mellan mätningar om de ska göras oberoende av varandra. Resultaten av lägesosäkerheten i denna studie kan sedan jämföras med de från tidigare studier, om liknande värden kan erhållas vid mätning av dold punkt och hur mycket de skiljer sig. Metoden med totalstation som testats i denna studie är en stång med två prismor på som hålls mot den dolda punkten. Prismorna på stången mättes in med totalstationen och med hjälp av punkternas koordinater kan bäringen mellan dem räknas ut, vektorn förlängs till den dolda punkten, och sedan kan den dolda punktens koordinater räknas ut. De metoder som testats med GNSS är beräkning med en rak linje och dess bäring och beräkning med dubbla längdmätningar. För både GNSS och totalstationsmätningarna har minsta kvadratmetoden använts för att beräkna den dolda punkten och dess lägesosäkerhet. Fyra olika varianter av totalstationsmätningarna utfördes. 0,7 m fast anlagd prismastång med manuell inriktning, 1,0 m fast anlagd prismastång med manuell inriktning, 1,0 m fast anlagd prismastång med automatisk inriktning och 1,0 m handhållen prismastång med manuell inriktning. Alla varianter utfördes i två mätningsomgångar. Lägesosäkerheten vid mätningar för en dold punkt med totalstation var i denna studie 1-2 mm i plan och runt 1 mm i höjd, lägst lägesosäkerhet gav manuell inriktning (0,7 m mellan prismorna) med 0,93 mm i plan och 0,79 mm i höjd. Vilken mätningsvariant som var bäst med totalstationsmätningarna varierade mellan mätningsomgångarna, men skillnaden dem emellan var inte så stor. Det är därför svårt att säga säkert vilken variant som ger bäst lägesosäkerhet med det antalet mätningar som utfördes i denna studie. Med GNSS erhölls osäkerheter på som lägst 7,3 mm där dubbla längdmätningar med stativ gav bäst resultat. Om GNSS-mottagaren placerades på ett stativ eller hölls upp med eller utan stödpinnar förändrade inte slutresultatet så mycket, men som väntat gav stativet lägst lägesosäkerhet. / A hidden point is a point that can´t be measured directly but must be measured indirectly using, for example, Global Navigation Satellite System (GNSS) or total station. There are several different methods with GNSS and total station that fit into different survey situations to survey a hidden point. Measurement of hidden points with total stations often occurs in industrial environments where pipes and the like hang in the way of the total station's line of sight to the measuring object. GNSS with network-Real-Time Kinematic positioning (network-RTK), a method that increases in measurement jobs, is a great way to indirectly measure hidden points outdoors where either poor reception of satellite signals or the ability to set an antenna over the point is not possible. The purpose of this study is to investigate how good measurement uncertainty it is possible to obtain when measuring hidden points with GNSS and total station and also compare the different methods tested. Five different methods are described to determine the coordinates of a hidden point with a total station. Among other things, one with a bar and prisms for measurements horizontally and in height, which will also be used in this study. Position uncertainty 0.1 mm both horizontally and in height should be achievable with that method. Methods that can be used with GNSS and network RTK are for example straight line and its bearing, the intersection of two straight lines and the intersection of two length measurements. With network RTK, measurements can achieve a position uncertainty in millimeters based on SWEPOS network RTK service. It is also important for time correlation between measurements to be made independently. The results of position uncertainty in this study can then be compared to those of previous studies, if similar values can be obtained when measuring hidden points and how much they differ. The method used for total station in this study is a bar with two prisms on it held against the hidden point. The prisms on the bar were measured with the total station and the bearing between them can be calculated with the help of the coordinates of the points, the vector is extended to the hidden point and then the coordinates of the hidden point can be calculated. The methods tested with GNSS are the calculation of a straight line and its bearing and calculation with double length measurements. For both GNSS and total station measurements, the least squares method has been used to calculate the hidden point and its measurement uncertainty. Four different alternatives of the total station measurements were performed. 0.7 m fixed prism bar with manual alignment, 1.0 m fixed prism bar with manual alignment, 1.0 m fixed prism bar with automatic alignment and 1.0 m hand-held prism bar with manual alignment. All alternatives were performed in two measuring rounds. Measurement uncertainty for measurements for a hidden point with total station in this study was 1-2 mm horizontally and around 1 mm in height, the lowest measurement uncertainty gave manual alignment (0.7 m between the prisms) with 0.93 mm horizontally and 0.79 mm in height. The measuring alternative which was the best with total station measurements varied between the two measuring rounds, but the difference between them was not that large. It is therefore difficult to say which method gives the best measurement uncertainty with the number of measurements performed in this study. GNSS received uncertainties of at lowest 7.3 mm where double length measurements with tripod yielded the best results. If the GNSS receiver was placed on a tripod or held up with or without support did not change the final result that much, but as expected, the tripod provided the lowest measurement uncertainty.
|
6 |
Particularly Responsible: Everyday Ethical Navigation, Concrete Relationships, and Systemic OppressionChapman, Christopher Stephen 20 August 2012 (has links)
In this dissertation, I articulate what I call a personal-is-political ethics, suggesting that the realm of human affairs long called ethics is inseparable from that which is today normatively called psychology. Further, I suggest that these names for this shared realm are situated in different discursive traditions which, therefore, provide different parameters for possible action and understanding. In my exploration of what it is to be human, I strategically centre ethical transgressions, particularly those that are mappable onto systemic forms of oppression. I explore personal-is-political enactments of sexism, ableism, racism, colonization, classism, ageism, and geopolitics, including situations in which several of these intersect with one another and those in which therapeutic, pedagogical, or parenting hierarchies also intersect with them. Without suggesting this is ‘the whole story,’ I closely read people’s narrations of ethical transgressions that they – that we – commit. I claim that such narrations shape our possibilities for harming others, for taking responsibility, and for intervening in others’ lives in an attempt to have them take responsibility (e.g., therapy with abuse perpetrators and critical pedagogy).
I work to demonstrate the ethical and political importance of: the impossibility of exhaustive knowledge, the illimitable and contingent power relations that are ever-present and give shape to what we can know, and the ways our possibilities in life are constituted through particular contact with others. I explore ethical transgressions I have committed, interrogating these events in conversation with explorations of resonant situations in published texts, as well as with research conversations with friends about their ethical transgressions and how they make sense of them. I tentatively advocate for, and attempt to demonstrate, ways of governing ourselves when we are positioned ‘on top’ of social hierarchies – in order to align our responses and relationships more closely with radical political commitments.
|
7 |
Particularly Responsible: Everyday Ethical Navigation, Concrete Relationships, and Systemic OppressionChapman, Christopher Stephen 20 August 2012 (has links)
In this dissertation, I articulate what I call a personal-is-political ethics, suggesting that the realm of human affairs long called ethics is inseparable from that which is today normatively called psychology. Further, I suggest that these names for this shared realm are situated in different discursive traditions which, therefore, provide different parameters for possible action and understanding. In my exploration of what it is to be human, I strategically centre ethical transgressions, particularly those that are mappable onto systemic forms of oppression. I explore personal-is-political enactments of sexism, ableism, racism, colonization, classism, ageism, and geopolitics, including situations in which several of these intersect with one another and those in which therapeutic, pedagogical, or parenting hierarchies also intersect with them. Without suggesting this is ‘the whole story,’ I closely read people’s narrations of ethical transgressions that they – that we – commit. I claim that such narrations shape our possibilities for harming others, for taking responsibility, and for intervening in others’ lives in an attempt to have them take responsibility (e.g., therapy with abuse perpetrators and critical pedagogy).
I work to demonstrate the ethical and political importance of: the impossibility of exhaustive knowledge, the illimitable and contingent power relations that are ever-present and give shape to what we can know, and the ways our possibilities in life are constituted through particular contact with others. I explore ethical transgressions I have committed, interrogating these events in conversation with explorations of resonant situations in published texts, as well as with research conversations with friends about their ethical transgressions and how they make sense of them. I tentatively advocate for, and attempt to demonstrate, ways of governing ourselves when we are positioned ‘on top’ of social hierarchies – in order to align our responses and relationships more closely with radical political commitments.
|
Page generated in 0.0486 seconds