Search results for "Lead"
showing 10 items of 1360 documents
Contribution of isotopic geochemistry to the origin of lead in the atmosphere of Sicily.
2001
Air quality can be assessed using mineral and biological indicators: airborne particulate matter, mosses, lichens, and pine needles. However, the origin of the pollutant is usually difficult to determine on the sole basis of concentrations, particularly when many sources are involved. In this study, we report some examples of application of lead isotopic geochemistry on airborne particulate matter, lichens and pine needles as a mean to decipher sources of lead pollution in Sicily. Furthermore, we evaluate the use of Pb/Sc and Pb/Br ratios to enhance the discriminating power of the isotopic method. Besides the methodological aspect, this work aims to provide, at least for lead, a summary of …
A low-level spectrometer with a planar low-energy HPGe: shielding arrangement tests and system performance for 210Pb determination in air filter samp…
2001
A system for low-energy photon spectrometry using a planar germanium detector with appropriate specifications is presented. A spectrometric background investigation has been carried out with various detector shielding arrangements. The characteristics of the system for measurements of 210Pb in air-particulate matter on filters have been determined.
Constructing the Audit Risk Assessment by the Audit Team Leader When Planning: Using Fuzzy Theory
2021
The aim of this study is to construct the assessment of the expected audit risk by the audit team leader (ATL) during the planification phase of the audit. The ATL plays an important role within the audit, and even more so regarding small and medium-sized (SME) audit firms. The audit risk assessment is critical as relying more (less) on internal controls implemented by the client leads to performing less (more) substantive audit procedures. This is determined by the ATL based on their professional judgement and previous experience. The use of fuzzy theory has powerful potential into the audit arena, as the audit risk assessment (outcome) is critically related to the auditors’ judgement and …
Persecution and Patronage: Oscar Buneman’s years in Britain
2016
The German student Oscar Bunemann, in trouble with the Nazi authorities in the mid-1930s, chose to emigrate to Britain and pursue a PhD there. After emigration, his surname appears as Buneman. On the verge of completing his degree in 1940, he was detained as an enemy alien and spent almost a year in internment. Upon release, he found work as an atomic scientist in England, and went on to lead a post-war career as a pioneering plasma physicist in the USA.We study forced migration of European scientists before and during the Second World War, and scientific patronage in the host countries. Buneman’s case is interesting from several points of view. Being a non-Jewish, non-communist, anti-Nazi …
Vom Sinn des Verfahrenskonzepts und der Verfahrensvielfalt – und warum das Baukasten-System in der Psychotherapie nicht funktioniert
2019
Why the concept of distinct psychotherapeutic approaches is indispensable - and why the tool box concept of psychotherapy cannot work Background: In Germany, the official psychotherapy guidelines are oriented towards the model of distinct psychotherapeutic approaches. Within the German health care system this also applies to the training in psychotherapy. Some critics, however, are presently pleading in favour of abolishing the model of distinct psychotherapeutic approaches, which also implies to abolish the concept of the so called "Richtlinienverfahren" in Germany - approaches of psychotherapy which proved to be efficacious and whose costs are reimbursed by the insurance companies. Object…
Más allá del acero: Otros metales y sus usos en la arquitectura del siglo XXI
2009
[ES] El protagonismo que ostentan los metales como compuestos básicos para el desenvolvimiento cotidiano de la vida humana resulta evidente e irrefutable. Del mismo modo que una mayoría de las actividades diarias que realizamos serían imposibles sin el apoyo que nos brinda el metal, un amplio porcentaje de la arquitectura de la última centuria también hace descansar sus fundamentos en la solidez de una estructura metálica. Más allá del hierro como predecesor y del acero como digno sucesor, la constructiva recurre asimismo con asiduidad a otros metales para conformar con ellos la imagen final del edificio, redundando en ésta componentes tanto técnicos como expresivos de los que son responsab…
Bi3+doping in 1D ((CH3)3SO)PbI3: A model for defect interactions in halide perovskites
2022
The recently described monodimensional hybrid pseudo-perovskite ((CH3)3SO)PbI3 exhibits complete Pb2+/Bi3+ miscibility in the B site. Heterovalent substitution imposes that charge-compensating defects are introduced in the lattice as well. This paper reports the energetics of point defects and the interaction between charge-compensating defects that occur upon Bi3+ doping in ((CH3)3SO)PbI3. Periodic DFT simulations were employed to analyze the formation energy of Pb2+ vacancies, (CH3)3SO+ vacancies, iodide vacancies, or the insertion of interstitial iodide ions. Solid solutions with a large Bi3+ content were modeled considering different charge compensation defects (Pb2+ vacancies, (CH3)3SO…
Valdas Adamkus un Vaira Vīķe –Freiberga: rietumu politiskā līderība postkomunistiskā Lietuvā un Latvijā
2016
Vaira Vīķe-Freiberga un Valdas Adamkus ir divi izcili politiskas līderības paraugi Latvijā un Lietuvā. Viņu politiskie uzskati nobrieda trimdā Rietumos, bet prezidentiem bija jācenšas tos uzskatus pielietot postkomunistiskā Latvijas un Lietuvas realitātē. Adamkus mēģināja transformēt politisko kultūru un partiju sistēmu; bet kad viņam tas neizdevās viņš koncentrējās uz ārpolitiskiem mērķiem un mēģināja atbalstīt reformas citas postkomunistiskajās valstīs, arī popularizēt pilsoniskās sabiedrības idejas savā valstī. Vīķe-Freiberga apņēmās pacelt Latvijas pašpārliecību mājās un starptautisko organizāciju acīs. Šis maģistra darbs ir mēģinājums salīdzināt prezidentu politiskās stratēģijas Rietum…
State and Politics in Religious Peacebuilding in Kenya, Zanzibar and Rwanda
2016
In this chapter, Steen-Johnsen argues that the question how do the political strategies of the state to regulate to the civil sphere and the enactment of these strategies influence the scope of opportunity for religious actors to build peace is relevant in contexts beyond Ethiopia. Steen-Johnsen presents three different African contexts: Kenya, Zanzibar and Rwanda, where political strategies to regulate the civil and religious spheres exist in different forms. Steen-Johnsen outlines how state authorities in these contexts, through different means, have launched political strategies to curb, or to some extent control, conflicts with religious dimensions. This, she argues, prompts the questio…
Theory on State and Politics in Religious Peacebuilding
2016
In this chapter, Steen-Johnsen offers an overview over theoretical perspectives which allow us to consider how the political strategies of a state to regulate civil society influence the opportunities of religious peacebuilders. Drawing upon theories of state–civil interactions, she suggests that religious actors engaged in peacebuilding can be considered as being affected by political strategies aiming at regulating the civil sphere. Steen-Johnsen argues that the state and civil spheres are interlinked and mutually influential but warns against viewing actors in the civil sphere as dictated by the political strategies of a state authority. Religious actors should rather should rather be co…