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Studies were conducted to determine the sediment oxygen demand (SOD) of a created urban wetland, the cause of differences between SOD methods, and the effect of temperature on the rate of exertion of SOD. <i>In situ</i>, laboratory tank, and laboratory core methods were employed to measure the SOD. It was observed that the main cause of differences in the results obtained by the three methods was differing water volume to sediment surface area (V/SA) ratios. SOD was found to increase with increasing V/SA ratios. By approximating the V/SA ratio of the marsh, the SOD for the system was estimated to be 3.08 g/m²/day. A 10°C rise in temperature was observed to more than double the SOD rate. / Master of Science

Field tests were conducted and historical operating data were evaluated to assess the performance of the Monterey WWTP utilizing subsurface flow (SF) constructed wetlands. Previous work with SF wetlands has demonstrated adequate, but variable removal of organic matter, suspended solids, and nitrogen. Few research studies have observed the generation of compounds in the wetlands that affect other treatment processes, specifically reduced compounds that contribute to the chlorine demand. This study attempts not only to distinguish the factors leading to the inadequate performance of the SF wetlands in removing organic matter and nitrogen, but also to identify the cause of the frequent occurrences of a nondetectable chlorine residual in the chlorine contact tank at the Monterey WWTP. Collection and analysis of historical operating data from January 1998 to May 2000 revealed a constantly decreasing removal of carbonaceous biochemical oxygen demand (CBOD5) by the SF wetlands and a poor removal of ammonia-N throughout the system. The decreasing removal of CBOD5 appeared to be caused by clogging of the wetland bed media by accumulated solids. The inability to remove the accumulated solids by pumping was shown. Analysis of field data also showed that the SF wetlands removed 88% of the influent TSS and 71% of the influent CBOD5, while experiencing a 18% increase in ammonia-N. Bisulfide produced in the anaerobic wetland beds accounted for 95% of the chlorine lost in contact tank. The variable production of sulfide is the cause of the frequent nondetectable chlorine concentrations observed. The results of this study suggest that chemical costs of chlorine and sulfur dioxide may be greatly reduced if bisulfide can be removed before chlorination. Also, the use of large rocks as media in SF wetland beds may significantly reduce the physical and biological removal of organic matter. / Master of Science

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Man lär så länge man lever sägs det, och även lärare på utbildningen för teckenspråkstolkar på Stockholms universitet säger att avslutad utbildning inte är likställt med att vara färdiglärd. För att undersöka om det går att se fortsatt utveckling har jag i denna uppsats jämfört tre studenter, från kandidatprogrammet i teckenspråk och tolkning, som går sista terminen och tre erfarna tolkar, som i snitt har en erfarenhet på 12,5 år, i deras produktion av konstruerat agerande (CA) och konstruerad dialog (CD) när de tolkar en barnbok. Resultatet visar att det inte fanns någon större skillnad mellan grupperna när det kommer till produktion av CA och CD, men en generalisering går inte att göra då resultatet inte går att applicera på hela yrkeskåren eftersom deltagargrupperna är så pass små. Det gick därmed inte att med hjälp av mitt resultat att dra några slutsatser kring hur en fortsatt utveckling sker efter att man har avslutat sin utbildning och har erfarenhet av att jobba som tolk. / They say that learning never stops. The teachers at the sign language interpreter program at Stockholm university say that having completed the program is not the same as being fully learned. In this study I have compared three students, from the bachelor’s program in sign language and interpreting, who are attending the last semester, as well as three experienced interpreters, with an average of 12,5 years of experience, in their production of constructed action (CA) and constructed dialogue (CD) when interpreting a children’s book. The results show no difference between the groups when looking at the production of CA and CD. Thus, since the participant groups are small, a generalization that applies to the whole field of interpreters cannot be made. This also resulted in that I could not make any assumptions about how any progress is made after one has finished their education and has some experience working as an interpreter.

This study compared the avian communities of treatment wetlands in South Florida called Stormwater Treatment Wetlands (STAs) to those in natural marshes and crop lands, and examined factors that influenced the size and structure of the avian communities within the STAs. The STAs contained a more abundant, rich and distinct avian community compared to reference land types. The STAs were dominated by wintering waterfowl, and therefore community patterns fluctuated more seasonally other land types. Within the STAs, density and richness in the fall and winter were much greater in the submerged aquatic vegetation than in the mixed emergent vegetation when waterfowl were present. The STAs maintain two vegetation treatments which enhanced their biodiversity value by supporting distinct avian communities with different migratory strategies This suggests the increase in treatment wetlands could partially offset the loss of natural wetlands, but avian communities in treatment wetlands are not surrogates for natural wetlands. / by Tyler J. Beck. / Thesis (M.S.)--Florida Atlantic University, 2013. / Includes bibliography. / Mode of access: World Wide Web. / System requirements: Adobe Reader.

Constructed wetlands are one of alternative solution wastewater treatment. Compared to conventional wastewater plants have many advantages. For example it´s technology saving construction, low operating costs, cleavability diluted wastewater and little or no need for electrical power. There are many publications dealing with Natural Ways wastewater treatment or even constructed wetlands. I decided to look for a thesis on one of the key processes – clogging bed media. The thesis is focused on ways to prevent clogging of bed media, mitigate the consequences and technology to increase hydraulic conductivity of constructed wetlands. The main test method is improving drainage parameters using pulsed filling and emptying of the bed media. This method is a very effective way to achieve quality requirements for effluent water from the treatment plant. Another test method is based on the injection of air into the media bed and sludge extraction using a specially modified industrial vacuum cleaner or pump.

Das Testen kognitiver Fähigkeiten ist ein Standardproblem in der Leistungsdiagnostik. Typische Anwendungsfelder sind Lernstandsüberprüfungen, Zulassungs- und Auswahlverfahren an Schulen und Hochschulen, aber auch Eignungs- und Einstellungsverfahren im betrieblichen Kontext. Sollen nicht nur einige wenige Personen, sondern größere Kohorten getestet werden, kommen aus testökonomischen Gründen vermehrt computerbasierte Tests (E-Assessments) und Aufgaben mit geschlossenem Antwortformat (Selected-Response, SR) zum Einsatz. Auf diese Weise lassen sich Tests automatisch auswerten, was gegenüber papierbasierten Tests den Testaufwand erheblich reduziert und eine zeitnahe Rückmeldung der Ergebnisse an die getesteten Personen erlaubt (Michel, Goertz, Radomski, Fritsch, & Baschour, 2015). Neben der guten Testökonomie besitzen SR-Tests auch aus psychometrischer Sicht Vorteile. So lassen sie sich nicht nur objektiver auswerten, sondern auch zeitsparender beantworten, wodurch eine größere Zahl an Aufgaben bei gleicher Testdauer gestellt werden kann Lindner, Strobel, & Köller, 2015). Dennoch werden SR-Tests insbesondere an Hochschulen häufig als besonders rigide Prüfungsform wahrgenommen (Kubinger, 2014). Eine wiederkehrend zu beobachtende Strategie scheint deshalb – wohl auch um die Akzeptanz dieser Prüfungsform zu erhöhen – die Ergänzung von E-Assessments um Freitextaufgaben (Constructed-Response, CR) zu sein. Hochschulprüfungen entscheiden über den Zugang zu erstrebenswerten Gütern einer Gesellschaft (Huinink & Schröder, 2014) und ziehen berufliche Auswahlentscheidungen nach sich (Rekrutierungsfunktion; Tsarouha, 2019). Vor dem Hintergrund der grundgesetzlich geregelten Berufswahlfreiheit (Artikel 12, GG) ergibt sich die berechtigte Forderung nach einer hohen diagnostischen Güte der eingesetzten Tests. Gleichzeitig erfordern die institutionellen Rahmenbedingungen an Hochschulen ökonomische Testmethoden. Aktuell fehlt es an Arbeiten, die den Verlust an Testökonomie durch Hinzunahme von CR-Items quantifizieren und den möglichen Gewinn an diagnostischer Güte zueinander ins Verhältnis setzen. Zudem weisen Schulleistungsstudien (Lafontaine & Monseur, 2009; Lissitz, Hou, & Slater, 2012; Reardon, Kalogrides, Fahle, Podolsky, & Zárate, 2018) und Untersuchungen aus dem Hochschulkontext (Arthur & Everaert, 2012) auf geschlechterdifferenzielle Effekte verschiedener Itemformate hin, die zu einem Problem für die Testfairness werden können. Beide Forschungsfragen adressiert der vorliegende Beitrag anhand einer empirischen Analyse von Daten einer E-Klausur, die die Abschlussprüfung eines erziehungswissenschaftlichen Moduls im universitären Lehramtsstudium bildet. [...aus der Einleitung]

För forskning om emotioner och emotionsbehandling är det en spännande tid. Nyare hjärnforskning har öppnat nya möjligheter för förståelsen av hjärnan och emotioner. En ny teori inom psykologisk konstruktionism, som utgår från hjärnforskningen, tvärvetenskapliga studier och bristerna i den dominerande affektteorin, basic emotion, är Theory of constructed emotion (TCE). Ännu finns ingen behandlingsmodell kopplad till TCE men utifrån dess fokus att beskriva hur hjärnan fungerar och emotioner skapas är det ändå intressant att undersöka om dess verksamma mekanismer. Detta är en översiktlig litteraturstudie med syfte att undersöka begreppen; allostas, interoception och emotionell granularitet i sammanhanget psykisk ohälsa och psykologisk behandling av emotionell problematik. Resultatet visar att allostas, kroppsbudgeten, är grunden i vår fysiska och psykiska mående, interoception och hjärnans prediktioner är viktiga för vår förmåga att förstå våra emotioner och emotionell granularitet hjälper oss att konstruera finkorniga emotionskoncept vilket hjälper oss att välja rätt handling vid rätt tillfälle till rätt emotion. Att träna upp interoception och emotionell granularitet hjälper oss att vidmakthålla psykisk hälsa och är bra psykoedukativa inslag i psykologisk behandling. Mer forskning behövs, främst kring hur man kan tillämpa begreppen i psykologisk behandling samt generellt för att bättre kunna integrera ny emotionsforskning med dominerande teorier för en gemensam förståelse för emotioner och psykoterapi. / For research on emotions and emotion processing, it's an exciting time. More recent brain research has opened new possibilities for the understanding of the brain and emotions. A new theory in psychological constructionism, based on brain research, interdisciplinary studies and the shortcomings of the dominant affect theory, basic emotion, is the Theory of constructed emotion (TCE). There is no treatment model linked to TCE yet but based on its focus on describing how the brain works and emotions are created, it is still interesting to investigate whether its active mechanisms. This is a general literature study with the aim of examining the concepts; allostasis, interoception and emotional granularity in the context of mental illness and psychological treatment of emotional problems. The results show that allostasis, the body budget, is the foundation of our physical and mental well-being, interoception and brain predictions are important for our ability to understand our emotions and emotional granularity helps us construct fine-grained emotion concepts that help us choose the right action at the right time to the right emotion. Training interoception and emotional granularity helps us maintain mental health and is a good psychoeducative element in psychological treatment. More research is needed, primarily on how to apply the concepts in psychological treatment and in general to better integrate new emotion research with dominant theories for a common understanding of emotions and psychotherapy.

Master of Science / Department of Civil Engineering / Natalie Mladenov / In the United States approximately 37% of the 4 trillion kWh of electricity is generated annually by combusting coal (USEPA, 2013). The abundance of coal, ease of storage, and transportation makes it affordable at a global scale (Ghose, 2009). However, the flue gas produced by combusting coal affects human health and the environment (USEPA, 2013). To comply with federal regulations coal-fired power plants have been implementing sulfur dioxide scrubbing systems such as flue gas desulfurization (FGD) systems (Alvarez-Ayuso et al., 2006). Although FGD systems have proven to reduce atmospheric emissions they create wastewater containing harmful pollutants. Constructed wetlands are increasingly being employed for the removal of these toxic trace elements from FGD wastewater. In this study the effectiveness of using a constructed wetland treatment system was explored as a possible remediation technology to treat FGD wastewater from a coal-fired power plant in Kansas. To simulate constructed wetlands, a continuous flow-through column experiment was conducted with undiluted FGD wastewater and surface sediment from a power plant in Kansas. To optimize the performance of a CWTS the following hypotheses were tested: 1) decreasing the flow rate improves the performance of the treatment wetlands due to an increase in reaction time, 2) the introduction of microbial cultures (inoculum) will increase the retention capacity of the columns since constructed wetlands improve water quality through biological process, 3) the introduction of a labile carbon source will improve the retention capacity of the columns since microorganisms require an electron donor to perform life functions such as cell maintenance and synthesis. Although the FGD wastewater collected possessed a negligible concentration of arsenic, the mobilization of arsenic has been observed in reducing sediments of wetland environments. Therefore, constructed wetlands may also represent an environment where the mobilization of arsenic is possible. This led us to test the following hypothesis: 4) Reducing environments will cause arsenic desorption and dissolution causing the mobilization of arsenic. As far as removal of the constituents of concern (arsenic, selenium, nitrate, and sulfate) in the column experiments, only sulfate removal increased as a result of decreasing the flow rate by half (1/2Q). In addition, sulfate-S exhibited greater removal as a result of adding organic carbon to the FGD solution when compared to the control (at 1/2Q). Moderate selenium removal was observed; over 60% of selenium in the influent was found to accumulate in the soil. By contrast, arsenic concentrations increased in the effluent of the 1/2Q columns, most likely by dissolution and release of sorbed arsenic. When compared to the control (at 1/2Q), arsenic dissolution decreased as a result of adding inoculum to the columns. Dissolved arsenic concentrations in the effluent of columns with FGD solution amended with organic carbon reached 168 mg/L. These results suggest that native Kansas soils placed in a constructed wetland configuration and amended with labile carbon do possess an environment where the mobilization of arsenic is possible.