725 research outputs found
Efficient Supply of Cultural Landscape in a CGE Framework
No full textIt is often assumed that the agricultural sector produces public goods or positive externalities that benefit the domestic consumers, in addition to its production of private goods. Efficient agricultural support is consequently directed towards resolving market failures caused by the existence of these public goods or externalities. We illustrate how this can be achieved in a Computable General Equilibrium model for one multifunctional aspect of agricultural production, namely the production of cultural landscape. Using a public good modeling framework as point of departure, we develop supply- and willingness to pay functions for cultural landscape. Governmental agricultural support is adjusted to achieve efficient supply of the public good. As an illustration we apply our framework using a general equilibrium model for Norway. We show that efficient supply of cultural landscape can be achieved even with a tremendous reduction in initial overall support of agricultural production.CGE modeling, Multifunctionality, Public Goods, Land Economics/Use,
Dynamic analysis and characterization of a desorption column for a continuous air capture process
No full textThe world is currently in the middle of an energy crisis, with a growing demand for energy playing catch up with an increasing population. The problem stems from the fact that we rely heavily on fossil fuels to meet our energy needs, and the combustion of these fuels are the primary source of greenhouse gas emissions. An accelerated rate of emissions of greenhouse gases has led and continues to lead to an increase in the average temperature of the planet, stated: Global Warming.Shifting the balance in our favour requires arresting and lowering our emissions. Direct air capture of Carbon dioxide is one solution that has garnered massive traction in the global scientific community. Zero Emission Fuels is a visionary start-up operating out of Delft that aims to build a micro-plant capable of producing methanol using energy derived from the sun and raw material (CO2and H2O)harnessed from the atmosphere. The heart of their concept is liquid amine-based direct air capture. ZEF has pioneered the continuous process that involves the simultaneous absorption and desorption of CO2and water as the amine circulates from the absorber to the desorption column. The raw material and the energy to drive the process is harnessed from the environment. Thus these inputs remain outside the control of the ZEF system and are treated as external disturbances. This research aims to analyse the impact of the varying environmental conditions, i.e. the ambient temperature, absolute humidity and incident solar radiation, on the performance of the desorption column. Following which a control scheme is developed to ensure the system meets the requirements of ZEF, i.e. production of CO2and water in a 3:1 molar ratio and an energy consumption limit of 450 kJ/mole of CO2desorbed.Firstly, a set of experiments with a trayed stripping column were performed to understand the start-up and shut-down behaviour of the column. Based on the observations, a simplistic model of the reboiler was developed to predict the transient behaviour of the column during start-up. A sensitivity analysis was carried out to gain insights into the parameters influencing start-up time and energy demand. Furthermore, different scenarios to start up a column were identified and based on the results, the batch mode is adopted as the efficient way to start up a column. The model predicts that start-up and shut-down account for less than 10% of the total operating time available. Moreover, start-up accounts for a maximum of 6% of the total available energy for production. Secondly, a set of single-stage kinetic experiments were performed at different temperatures to understand the limitations of the desorption process inside the column. A vapour-liquid equilibrium based stage-by-stage model of a desorption column integrated with a varying space-time yield based absorber model. Design parameters of the integrated DAC model were tweaked, and a base case was developed, to understand the impact of a varying sorbent composition and PV panel output on the performance of the DAC subsystem. It was clear the open model was not capable of meeting the 3:1top ratio specifications of ZEF. Which prompted the implementation of control structures. Single loop mass-flow control, pressure control and cascade mass flow-temperature control schemes were individually tested with the aid of the integrated DAC model. Finally, based on the performance of the individual control schemes, a final parallel control scheme was developed. Wherein the temperature and the pressure of the system adjusts according to the varying power input and the absolute humidity conditions that impact the top ratio of products. The parallel control scheme was found to be adequate in maintaining the top ratio at desired levels
Project communication: Enhancing the communication practices of a design team to achieve project success
No full textResearchers in the past have shown that communication is integral to successful results in a project's design phase. This is said so as there are multiple professionals from diverse backgrounds who come together to prepare a project's design. Consequently, communication between these professionals becomes a key component as it is the way they share project information apart from sharing their knowledge and thoughts at this stage. However, the relationship between communication and project success is not well defined, particularly the understanding of the barrier and drivers of communication in a design team seems obscure. Thus, this research builds on this theme and tries to understand project communication in detail. By examining the communication practices of a design team through the lens of literature, this study aims to describe how communication affects the project outcome and specify ways to improve it. To fulfill this objective, this research is divided into three parts. In part A, the literature is reviewed to gain insights and reflect on the attributes that describe the communication of a design team and explain the influence of these attributes on project success. In part B, a document review is done to analyze the documents produced by a design team that provide guidelines for the team's communication practices for project success. In part C, semi-structured interviews are conducted to obtain empirical data explaining the communication practices followed by the team while working on a project. Following this, the results obtained from the three parts are compared, which helps identify the gaps in literature and the guidelines contained in the documents on the communication practices to be used by the team.The results of this study suggest that communication is the central aspect that controls the functioning of the team. Communication practices impacts the team's collaboration, coordination, project performance, and quality of the work produced by the team. The impact of communication practices on these aspects of a project is categorized under two categories: drivers and barriers of communication. Based on these, recommendations for improving communication practices and mitigating barriers to project success are made and validated with experts. The study concludes with discussions on how adapting lean principles can bring many benefits to a team in the form of focus in meetings, minimizing transaction time of sharing information and developing a feedback culture. Also, these discussions describe that when working on a complex project, using a recommendation framed in this research; a team can mitigate various challenges associated with groupthink.Civil Engineering | Construction Management and Engineerin
The Legal Framework for the Development of Ocean Thermal Energy Conversion (OTEC)
No full textThis Article analyzes the legal framework envisioned in recent legislation that was created to encourage the development of Ocean Thermal Energy Conversion (OTEC) as a commercial energy technology and suggests various changes to the statutory framework. The author highlights the implications of the ongoing United Nations Law of the Sea Negotiations for OTEC development. The author concludes that, while uncertainties remain, the legislation marks a significant step toward the eventual development of OTEC as a viable energy source
Canonical Kähler metrics with cone singularities
No full textThis dissertation consists of some results on the existence and regularity of canonical Kähler metrics with cone singularities. First, a much shorter proof is provided for a result of H. Guenancia and M. Paun, that solutions to some complex Monge-Ampère equations with conical singularities along effective simple normal crossing divisors are uniformly equivalent to a conical metric along that divisor. It is also shown that such metrics can always be approximated, in the Gromov-Hausdorff topology, by smooth metrics with a uniform Ricci lower bound and uniform diameter bound. As an application, it is proved that the regular set of these metrics is convex. Next, the existence of conical Kähler-Einstein metrics and conical Kähler-Ricci solitons on toric manifolds is studied in relation to the greatest lower bounds for the Ricci and the Bakry-Emery Ricci curvatures. It is also shown that any two toric manifolds of the same dimension can be connected by a continuous path of toric manifolds with conical Kähler-Einstein metrics in the Gromov-Hausdorff topology. In the final chapter, the greatest lower bound for the Bakry-Emery Ricci curvature is studied on Fano manifolds. In particular, it is related to the solvability of some soliton-type complex Monge-Ampère equations and the properness of a twisted Mabuchi energy, extending previous work of Székelyhidi on the greatest lower bound for Ricci curvature.Ph. D.Includes bibliographical referencesby Ved V. Data
Analyza genomu rostlin pomoci prutokove cytometrie.
No full textFlow cytometry involves analysis of light scatter and fluorescence properties of particles in flow, moving with respect to the point of measurement. Because flow cytometry analyzes the particles individually and at high speed, large populations of cells and organelles can be measured in a short time and the presence of subpopulations may be detected. A possibility to separate physically defined subpopulations of biological particles at high speed multiplies the number of possible applications. Flow cytometry was originally developed as a method for rapid counting and analysis of blood cells. With the technical evolution and by the development of new fluorescent probes it became a useful tool in many areas of biological research. Although the use of FCM for the analysis of plant cells and their organelles was delayed until early 80s of the 20th century, the number of applications has been continuously increasing. The thesis summarises development of new methods for flow cytometric analysis of plant genomes and the results obtained using the methods during the period 1989 - 2000. During this time, the author of the thesis founded the Laboratory of Molecular Cytogenetics and Cytometry, which has been pioneering the use of flow cytometry in plant sciences in the Czech Republic. The thesis consists of 52 scientific papers. 40 of them represent original scientific papers and 12 are review papers.Text also in English.Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi
Fabler af Aesop ved Christian Winther
No full textThis book represents one of the nicer finds in my visit to Scandinavia. It is the kind of book I expected to find more of--and in fact have found more of on the web after the visit. It offers 203 fables on 155 pages, following, as the title-page says, the edition of Thomas James, presumably of 1848. It includes, without acknowledging the artist, the engravings of John Tenniel (or perhaps some of those of Joseph Wolf?). In fact, it makes a good choice of the best Tenniel illustrations to offer. The illustrations here, not listed in the book itself, are FG (1), The Old Hound (11), DS (16), LM (22), OF (27), TB (39), The Ass and the Dog (45), BS (58), The Herdsman and the Lion (65), The Cat in a Bag (74), The Cook and the Uninvited Dog (82), The Ass and His Driver (92), The Crow and the Ram (103), The Camel and His Driver (116), The Ass and the Religious Object (121), The Ass and the Horse (124), The Fisherman and His Nets (131), The Old Lion (141), and six images for MSA (151-55). The book shows extensive foxing. Bodemann incorrectly describes an 1880 edition (Bodemann #314.2) by the same editor and publisher as Dän. Erstausgabe.This is a hardbound book (hard cover)Language note: DanishChristian Winther, Efter den engelste Bearbeidelse af Thomas James M.A
"Blind" klagesensur ved Universitetet i Oslo Pålitelig og rettferdig eller et steg i feil retning?
No full textDenne artikkelen beskriver og analyserer virkningene av «blind» klagesensur ved Universitetet i Oslo. Før 01.08.14 hadde de nye sensorene ved sensurklage tilgang til resultatene fra ordinær sensur, mens denne muligheten ble tatt bort da «blind» klagesensur ble tatt i bruk fra og med høsten 2014. Undersøkelsen er gjennomført med utgangspunkt i registerdata for to ulike perioder, før og etter at «blind» klagesensur ble innført. Undersøkelsen viser at klagetilbøyeligheten har økt over tid, uavhengig av sensurordning. Samtidig har «blind» sensur ført til større avvik og større spredning sammenliknet med ordinær sensur. Nyordningen har samtidig ført til en jevnere fordeling mellom endringer i positiv og negativ retning. Norsk Studentorganisasjon var en sentral pådriver for innføring av «blind» klagesensur på nasjonal basis. De ønsket med dette en større grad av likebehandling, og dermed en mer rettferdig vurderingsordning. Denne undersøkelsen viser at nyordningen neppe har vært til studentenes gunst.publishedVersionCopyright © 2019 Author(s). This is an open access article distributed under the terms of the Creative Commons CC BY 4.0 License (https://creativecommons.org/licenses/by/4.0/)
Transporttid ved prehospital hjertestans
No full textTittel: Transporttid ved prehospital hjertestansDato: 31. Mai 2024
Forfatter: Sigrid Størvold & Siril Nilssen
Veileder: Kristian Ringsby Odberg
Nøkkelord/stikkord: Hjertestans, transporttid, beslutningsprosess, paramedisinere og prehospital
Antall sider/ord: 47/ 8908 Antall vedlegg: 16Publiseringsavtale inngått: Ja
Forskingsspørsmål: “Hvilken påvirkning har transporttid for beslutning om videre behandlingsforløp ved prehospitale hjertestanser?”
Bakgrunn: Prosedyren for hjerte-lunge redning i Norge er stadig under utvikling og endring. Selv om prosedyren og retningslinjene kontinuerlig utvikles er transport av pasienter med hjertestans et lite omtalt tema. Det finnes lite litteratur om hvordan transporttiden eventuelt påvirker pasientutfallet og beslutningsprosessen.
Hensikt: Hensikten er å bygge en større forståelse for hvordan transporttid påvirker beslutning om behandling som kan danne grunnlag for nye retningslinjer, basert på etablert forskning om temaet.
Vi skal se nærmere på dette grunnet økende mengde prehospitale hjertestanser per år, noe som medfører et økende antall ganger en paramedisin må gjennomgå en slik beslutningsprosess.
Metode: Vi har brukt litteraturstudie som metode. Det er inkludert kvantitativ forskningslitteratur for å besvare oppgaven. Litteraturen har vi funnet gjennom strukturerte søk i databasene PubMed og Cinahl Complete.
Resultat: Hjertestans har høy dødelighet. Transporttid var vist å kunne påvirke sjansen for overlevelse i kombinasjon med flere faktorer. Pasientens hjerterytme, bevitnet hjertestans og scenetid er faktorer som har en viktig sammenheng for pasientens utfall. Den totale sammenhengen vil bidra til beslutning om hvordan videre behandlingsforløp foregår.
Konklusjon: Transporttiden i sammenheng med andre faktorer har en innvirkning om det skal besluttes å transportere pasient videre for behandling, eller at behandlingen blir avsluttet på stedet. Uavhengig av dette, er det fortsatt uvisst i hvor stor grad transporttiden alene påvirker videre behandlingsforløp.Title: Transport time of out-of-hospital cardiac arrest Date: 31. May. 2024
Author: Sigrid Størvold & Siril Nilssen
Supervisor: Kristian Ringsby Odberg
Keywords: Cardiac arrest, transport time, the decision process, paramedic, out of hospital
Number of pages/words: 47/ 8908Number of appendix: 16Availbility: Yes
Research topic: "What impact does the transport time have on the decision for further treatment in out-of-hospital cardiac arrests?”
Background: The procedure for cardiopulmonary resuscitation in Norway is in constantly development. Despite the ongoing development of the procedures and guidelines, the transport of patients with cardiac arrest is a rarely discussed topic. Additionally, there is a limited amount of literature on how the transport time may affect the patient`s outcome and the process in making a decision.
Purpose: The purpose is to get a better understanding of how the time in transport affects the decisions about our treatments, which can serve as a basis for the new guidelines, based on the research that´s already been established within the topic. We aim to closely examine this issue due to the increasing number of prehospital cardiac arrests per year, which results in a growing number of instances where a paramedic must undergo such a decision in the process.
Method: We employed a literature study method. It is included quantitative research literature to address this question. The literature is identified through structured searches in the databases PubMed and CINAHL Complete.
Results: Cardiac arrest has a high mortality rate. Transport time has been shown to affect the chance of survival in combination with several factors. The patient`s heart rhythm, witnessed cardiac arrest and time on scene, are factors that have an important correlation with the patient's outcome. The overall context will contribute to the decision on how the subsequent course of treatment proceeds.
Conclusion: Transport time, in conjunction with other factors, influences whether it is decided to transport the patient for further treatment or to terminate treatment on-site. Regardless, it remains unclear to what extent transport time alone affects the subsequent treatment course
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