Search results for "CLIMATE"
showing 10 items of 4934 documents
DFT Prediction of Enhanced Reducibility of Monoclinic Zirconia upon Rhodium Deposition.
2018
Oxides are an important class of materials and are widely used, for example, as supports in heterogeneous catalysis. In a number of industrial catalytic processes, oxide supports actively participate in chemical transformations by releasing lattice oxygen anions. While this is intuitively understood for reducible oxides, the reducibility of irreducible oxides may be modified via nanoengineering or upon inclusion of foreign species. Our calculations predict that the ability of irreducible monoclinic zirconia to release oxygen improves substantially upon deposition of rhodium. Through a comprehensive screening of Rh/ZrO2 with different size of the rhodium species, we find that a Rh adatom and…
Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory
2019
The profile of the longitudinal development of showers produced by ultra-high energy cosmic rays carries information related to the interaction properties of the primary particles with atmospheric nuclei. In this work, we present the first measurement of the average shower profile in traversed atmospheric depth at the Pierre Auger Observatory. The shapes of profiles are well reproduced by the Gaisser-Hillas parametrization within the range studied, for E>10 17.8 eV .A detailed analysis of the systematic uncertainties is performed using ten years of data and a full detector simulation. The average shape is quantified using two variables related to the width and asymmetry of the profile, and …
German and British parliaments and conceptions of the global climate threat during the United Nation Earth Summit of 1992
2019
Ever since the beginning of international climate conservation politics there has been variation across nations in political traditions in debating the climate issue. Political decision-makers have interpreted the scientific findings on global warming with different emphases, thereby giving rise to variation in views on preferred national or international solutions. These tensions first became evident before and during the Earth Summit of the United Nations in 1992 in Rio de Janeiro, when the United Nations Climate Change Convention was prepared and eventually signed. This article discusses the historical background of international climate conservation politics and illustrates the tensions…
Coping Strategies against peer victimization: differences according to gender, grade, victimization status and perceived classroom social climate
2021
The Sustainable Development Goals (SDGs) include “Good Health and Well-being” (SDG3) and “Quality Education” (SDG4). Nevertheless, many students cannot achieve these goals if they suffer peer victimization at their schools, and intervention programs to reduce it are necessary. These programs should consider the possible differences in the coping strategies preferred by students according to some personal (e.g., gender, grade, victimization status) and contextual (e.g., perceived classroom social climate) factors to be more effective. Therefore, the objective of this study was to analyze the possible differences in the coping strategies preferred by students (ask a friend for help, ask a tea…
The importance of psychological variables in the perceived exertion of young football players
2017
Las escalas para medir la percepción del esfuerzo están entre los métodos que han sido utilizados para el control y la evaluación de la carga interna del entrenamiento en deportes de equipo como el fútbol. Debido a su naturaleza psicofisiológica, su registro proporciona información proveniente tanto de indicadores fisiológicos como psicológicos del deportista. Dentro del marco de la Teoría de la Autodeterminación (SDT, Self Determination Theory; Deci & Ryan, 1985; Ryan & Deci, 2017) y de la Teoría de las Metas de Logro (AGT, Achievement Goal Theory; Ames, 1992; Nicholls, 1989), en esta tesis doctoral se estudian tanto las variables contextuales desadaptativas (dimensiones del clima motivaci…
New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Cata…
2019
This work demonstrates new evidence of the efficient destruction and mineralization of an emergent organic pollutant using UV-A and titanium nanosized catalysts. The target compound considered in this work is the primary metabolite of a lipid regulator drug, clofibrate, identified in many studies as refractory during conventional wastewater treatment. The photocatalytic performance study was carried out in batch mode at laboratory scale, in aqueous suspension. Kinetic data showed that titanium dioxide P25 Aeroxide® exhibits the highest photocatalytic efficiency compared to the other investigated catalysts. Pollutant degradation and mineralization efficiencies strongly increased when decreas…
Northern Drosophila montana flies show variation both within and between cline populations in the critical day length evoking reproductive diapause
2013
Reproductive diapause, and its correct timing, plays an important role in the life cycle of many insect species living in a seasonally varying environment at high latitudes. In the present paper we have documented variation in the critical day length (CDL) for adult reproductive diapause and the steepness of photoperiodic response curves (PPRCs) in seven clinal populations of Drosophila montana in Finland between the latitudes 61 and 67°N, paying special attention to variation in these traits within and between cline populations. The isofemale lines representing these populations showed a sharp transition from 0% to 100% in females' diapause incidence in the shortening day lengths, indicate…
Predicting species richness of wood-inhabiting fungi, epiphytic bryophytes and lichens based on stand structure and indicator species
2015
Maailmanlaajuinen monimuotoisuuden vähentyminen on ollut suuri huolenaihe jo useiden vuosikymmenten ajan. Lauhkeat lehtimetsät ovat yksi eniten ihmisen vaikutuksesta kärsineistä biomeista ja eteenkin vanhat, luonnontilaiset metsät ovat vähentyneet huolestuttavasti. Ilmaston ja maisemallisten tekijöiden lisäksi metsän historia, häiriödynamiikka, metsätalous ja ekologinen jatkuvuus vaikuttavat metsän rakenteelliseen monimuotoisuuteen ja näin ollen myös lajirunsauteen. Monet lajiryhmät ovat kuitenkin huonosti tunnettuja ja vaikeasti havaittavissa, eikä lopullisia syitä lajin häviämiseen alueelta pystytä varmasti sanomaan. Tutkimukseni tarkoitus oli selvittää, mitkä elementit metsän rakenteessa…
"Ihmiskunnalle ennen kokematon uhka" : ilmastonmuutoksen poliittiset merkitykset turvallisuus- ja puolustuspoliittisissa selonteoissa ja eduskunnassa…
2020
Artikkelissa tarkastellaan ilmastonmuutoksen turvallisuuspoliittisia merkityksiä Suomessa poliittisen kielenkäytön analyysimenetelmin. Turvallisuus- ja puolustuspolitiikassa uhkakuvat sekä niiden tärkeysjärjestys ja merkitys ovat poliittisen kamppailun kohteena. Käsitteellisellä tasolla esimerkiksi ilmastonmuutoksen turvallisuuspoliittinen merkitys määräytyy poliittisissa debateissa, joissa esitetään argumentteja politiikan linjanvedosta, ratkaisuista ja resursseista. Poliittiseen kielenkäyttöön, käsitteisiin ja argumentteihin keskittyvä analyysimenetelmä on tapa analysoida, missä merkityksissä ja yhteyksissä ilmastonmuutosta on parlamentaarisessa poliittisessa puheessa ja politiikkaa linja…
Città-porto a prova di futuro. Linee guida per l’integrazione di soluzioni basate sulla natura per l’adattamento climatico e la tutela della biodiver…
2023
Quale è il ruolo della pianificazione nel rispondere alle sfide della crisi climatica e della perdita di biodiversità nei contesti urbano-portuali? Il lavoro di ricerca costituisce un avanzamento del dibattito sulla riqualificazione delle aree portuali, contesti storicamente avulsi dalla considerazione di tematiche legate alla preservazione e valorizzazione degli habitat naturali e degli ecosistemi. La tesi desidera mettere al centro della discussione le città porto mediterranee come ecosistemi e come insediamenti urbani multi-specie, come attrici del cambiamento responsabile di fronte alle crisi e non soltanto nodi infrastrutturali strategici per l’economia, la finanza e gli usi militari. …