"Blue energy" from ion adsorption and electrode charging in sea- and river water

A huge amount of entropy is produced at places where fresh water and seawater mix, for example at river mouths. This mixing process is a potentially enormous source of sustainable energy, provided it is harnessed properly, for instance by a cyclic charging and discharging process of porous electrodes immersed in salt and fresh water, respectively [D. Brogioli, Phys. Rev. Lett. 103, 058501 (2009)]. Here we employ a modified Poisson-Boltzmann free-energy density functional to calculate the ionic adsorption and desorption onto and from the charged electrodes, from which the electric work of a cycle is deduced. We propose optimal (most efficient) cycles for two given salt baths involving two canonical and two grand-canonical (dis)charging paths, in analogy to the well-known Carnot cycle for heat-to-work conversion from two heat baths involving two isothermal and two adiabatic paths. We also suggest a slightly modified cycle which can be applied in cases that the stream of fresh water is limited.Comment: 7 Figure

2S hyperfine structure of atomic deuterium

We have measured the frequency splitting between the $(2S, F=1/2)$ and $(2S, F=3/2)$ hyperfine sublevels in atomic deuterium by an optical differential method based on two-photon Doppler-free spectroscopy on a cold atomic beam. The result $f_{\rm HFS}^{(D)}(2S)= 40 924 454(7)$ Hz is the most precise value for this interval to date. In comparison to the previous radio-frequency measurement we have improved the accuracy by the factor of three. The specific combination of hyperfine frequency intervals for metastable- and ground states in deuterium atom $D_{21}=8f_{\rm HFS}^{(D)}(2S)-f_{\rm HFS}^{(D)}(1S)$ derived from our measurement is in a good agreement with $D_{21}$ calculated from quantum-electrodynamics theory.Comment: 7 pages, 7 figure

Crisis Intervention and Psychological Service of the Fire Rescue Service of the Czech Republic and the Police of the Czech Republic

Tématem bakalářské práce je krizová intervence a působení psychologické služby Hasičského záchranného sboru České republiky a Policie České republiky. Práce je zaměřena na působnost a využitelnost psychologické služby zaměstnanci a příslušníky obou sborů. V teoretické části práce je popsána krize jako součást života člověka a jakými způsoby se může projevovat. Následuje charakteristika osoby krizového interventa a krizově intervenční techniky jako nástroje možné pomoci. V dalších kapitolách je rozebrán systém psychologické služby a jeho složky u Hasičského záchranného sboru České republiky a u Policie České republiky. V praktické části bakalářské práce je proveden průzkum pomocí nestandardizovaného anonymního dotazníku, který byl distribuován příslušníkům a zaměstnancům Hasičského záchranného sboru České republiky a Policie České republiky v rámci celé České republiky. Cílem praktického úseku je zjistit využitelnost psychologické služby u obou sborů, jakým způsobem je příslušníky a zaměstnanci vnímána a využívána. V poslední řadě je zjišťováno povědomí o existenci Anonymní telefonní linky pomoci v krizi. V závěru práce jsou námi zjištěné výsledky porovnány s výsledky jiných autorů a jsou navržena možná řešení pro praxi.The theme of the Bachelor work is Crisis intervention and psychological service of the Fire Rescue Service of the Czech Republic and the Police of the Czech Republic. The work is focused on the operation and usability of psychological service by employees and members of both agencies. The theoretical part describes crisis as part of a human life and possible ways of its manifestation. It furthermore depicts crisis intervention employees and techniques as a tool of possible assistance. The following part describes the system of psychological service and its bodies in the Fire Rescue service of the Czech Republic and the Police of the Czech Republic. The practical part of the bachelor work contains the research performed in the form of non-standardized anonymous questionnaire distributed among the members and employees of the Fire Rescue Service of the Czech Republic and the Police of the Czech Republic. The aim of the practical part is to determine the usability of psychological service in both agencies, and how the employees and members perceive and take advantage of the service. The last part finds out about the awareness of the existence of Anonymous help line in crisis. The concluding part of the work compares results we have obtained with the results of other authors and it proposes possible solutions for practice

La discrimination en emploi fondée sur le handicap psychologique

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal

Highway Statistics 2006

This is an annual report containing analyzed statistical data on motor fuel, motor vehicles, driver licensing, highway-user taxation, State and local highway finance, highway mileage, Federal-aid for highways, as well as information on the Nationwide Personal Transportation Survey, and selected data for international data