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<p>The aim of the study was to show whether or not there exists, and if so, to understand, a common creativity, vision and imagination of the members of Småland’s Entrepreneurial Academy’s organisation.</p><p>The method used for this research is the fictive narrative collage , which consists of the collection of fictive stories. The author has also made her own additions to the method. A composer composes songs to the narratives, two artists illustrate the narratives. The research is carried out on the total population within Småland’s Entrepreneurial Academy which consists of 10 permanent members of the organisation.</p><p>The theory focuses on different areas, such as creativity, vision and imagination as well as on the entrepreneur and the organisation. The latter two to provide the research with a foundation for the whole.</p><p>Analyses were carried out and interpreted by the author, coupled to the theory, but also with a starting point in the interpretations that the composer and artists made in their contributions. Theatrical metaphors are used to draw parallels and to make further clarifications in the interpretation and the texts.</p><p>The results show that vision, imagination and creativity do exist and common characteristics have been able to be identified, such as the creativity of the entrepreneur and his or her desire to go his or her own way, to not enter into conflict with his or her own role. In the vision, there are common trains of thought, where a balance in life/existence is the most central. If imagination is allowed completely free flight, the research group will allow anarchy to reign.</p>

Στην παρούσα διπλωματική γίνεται ανάλυση και μοντελοποίηση ενός φωτοβολταϊκού και ενός αιολικού συστήματος συνδεμένα στο δίκτυο. Το φωτοβολταϊκό σύστημα θα αποτελείται απο 400 πλαίσια συνδεμένα μεταξύ τους, έναν μετατροπέα ανύψωσης της συνεχούς τάσης που βγάζουν τα φωτοβολταϊκά στην έξοδό τους και έναv αντιστροφέα που μετατρέπει την συνεχή τάση σε εναλλασσόμενη. Το αιολικό σύστημα αποτελείται απο μια ανεμογεννήτια, μια επαγωγική μηχανή διπλής τροφοδοσίας (DFIG), έναν ανορθωτή που μετατρέπει την εναλλασσόμενη τάση που δίνει στην έξοδό της η μηχανή σε συνεχή, και έναν αντιστροφέα που μετατρέπει την τελετυαια τάση σε εναλλασσόμενη. Στα συστήματα αυτά θα εφαρμόσουμε μια κατάλληλη στρατηγηκή ελέγχου, προκειμένου να έχουμε την μέγιστη παραγωγή ισχύος. Στο παραπάνω σύστημα θα αναλύσουμε θεωρητικά τη λειτουργία του και στη συνέχεια θα το προσωμοιώσουμε μέσω του Simulink του MATLAB. / This thesis is an analysis and modeling of a PV and a wind system connected to the network. The photovoltaic system consists of 400 panels connected together, a dc boost converter and an inverter. The wind system consists of a double fed induction generator (DFIG), a rectifier, and an inverter. These systems will implement the appropriate control in order to have the maximum power output. We will theoretically analyze the function of the above system and then the simulate it's operation through MATLAB's Simulink.

Η παρούσα διπλωματική εργασία πραγματεύεται την ανάλυση και τον σχεδιασμό έλεγχο ενεργού και αέργου ισχύος επαγωγικής γεννήτριας διπλής τροφοδοσίας (Doubly-Fed Induction Generator, DFIG), που χρησιμοποιείται σήμερα κατά κόρον σε συστήματα ανεμογεννητριών. Ο έλεγχος επιτυγχάνεται μέσω του διανυσματικού ελέγχου με προσανατολισμό στην τάση του δικτύου (Voltage-Oriented Control, VOC χρησιμοποιώντας αναλογικο-ολοκληρωτικούς (Proportional-Integral, PI) ελεγκτές, επιβάλλοντας με αυτόν τον τρόπο την επιθυμητή μεταβατική συμπεριφορά. / The following diploma thesis addresses the analysis and design of an active and reactive power control system for a Doubly-Fed Induction Generator (DFIG), vastly used in wind power systems. Control is being achieved under voltage orientation (Voltage-Oriented Control, VOC) and through the use of proportional-integral (PI) controllers, who impose the desirable transient behavior.

Διάφοροι τύποι αιολικών συστημάτων . Έμφαση σε αιολικά συστήματα με ανεμογεννήτριες μεταβλητής ταχύτητας και κυρίως στην επαγωγική μαχανή διπλής τροφοδοσίας . Περιγραφή του ηλεκτρονικού μετατροπέα που χρησιμοποιείται σε αυτού του είδους το σύστημα . Έλεγχος της ισχύος και προσομοίωση για δύο τύπους ελεγκτών , PI και RST . Σύγκριση των αποκρίσεων . Απόκριση PI ελεγκτή για διάφορα κέρδη . / Different types of wind energy systems . Wind energy systems with variable speed wind turbines are studied . The doubly fed induction generator . Description of the power electronic converter which is used . Power control for two regulator types , PI and RST . We compare the dynamic performances . Dynamic performance for different values of the PI regulator parameters .

A study was conducted to evaluate the quality characteristics in a comparative manner of grass-fed and grain-fed beef. Thirty two commercially bred beef steers were used. These steers were assigned to one of four treatments; grain-fed, grass/grain-fed, grass-fed and irrigated. These treatments were each reflective of the ration that would be provided to the animal. Individual animal weights were recorded every 28 days throughout the portion of the study. The grain-fed animals realized the highest (P<0.05) average daily gain with the grass-fed and irrigated having the lowest. The steers were harvested when they reached the pre-determined criteria, which was 0.4 inch back fat as measured at the 12th rib via ultrasonography, for the grain-fed or 800 pounds for the grass-fed animals. All animals, once harvested, were graded based upon USDA quality grades with results mirroring those previously mentioned. Carcasses were involved in an aging study in which all left sides of the carcasses were fabricated into primal cuts, vacuumed packaged and aged for 14 days while the right sides were dry aged during the same period. Shear force data were collected to provide for a measure of tenderness. All samples were significantly (P<0.05) more tender following aging with no difference being realized between aging techniques. Percent cutout was also calculated for the two techniques to quantify what difference, if any, existed. No significant difference (P>0.05) was shown between wet and dry aging with regard to percent cutout. Sensory evaluation was also conducted based upon the attributes of juiciness, tenderness and flavor intensity. For all three attributes grain-fed beef was favored (P<0.05). The panelists detected no difference in aging technique for any of the treatments (P>0.05).Carcass soft tissue chemical composition (lipid, protein and moisture) was also evaluated for the treatments. Grain-fed beef was shown to be highest (P<0.05) for overall percent lipid and lowest for percent moisture and protein. The grass-fed carcasses were the opposite, being highest for overall moisture and protein and lowest for lipid (P<0.05).

The impact of lactate producing direct-fed microbial (DFM) on growth performance and rumen fermentation in beef cattle was explored in four studies. Experiment 1 studied the interaction between DFM and degradable intake protein (DIP) supply in receiving cattle. No differences (P≥0.06) in intake, morbidity, or immune response were observed; however, during the first 28 d gain and efficiency responses to DFM were dependent on DIP (DIP×DFM P≤0.05). Experiment 2 showed that in vitro gas production and select endpoint metabolites differed (P≤0.04) with DFM application. Experiment 3 compared lactate producing DFM to a lactate producing/utilizing DFM in finishing cattle. No differences (P≥0.14) in intake, gain, efficiency, or carcass characteristics were observed between control and lactate DFM; however, gain and growth efficiency differed (P≤0.05) between the lactate producing and lactate producing/utilizing DFM during the later portions of feeding. Experiment 4 studied the impact of DFM on ruminal fermentation, lactate utilization, and total tract digestibility. Ruminal pH and molar proportions of acetate were increased (P≤0.05) with DFM; however, lactate utilization and total tract digestibility did not differ (P≥0.33). The studies suggest that DFM improve growth performance during receiving and responses are at least partly mediated through differences in ruminal fermentation.

The impact of supplying a mixed culture of lactate producing bacteria on in-vitro rumen fermentation of forage- (Experiment 1) and concentrate- (Experiment 2) based diets in the presence and absence of monensin was explored. In experiment 1, interactions between DFM and MON were absent (P>0.10) for gas production and fermentative end products. Gas production and fermentative end products were unaffected by DFM alone (P>0.10). Monensin decreased (P<0.001) CH4 and NH3 production, rate and total gas production, as well as total VFA concentration and molar proportions of acetate and butyrate. However, MON increased (P<0.001) proportions of propionate, valerate, isobutyrate and isovalerate. Independently, DFM and MON increased (P<0.001) end point pH. In experiment 2, DFM x MON interactions or tendencies (P=0.07, P<0.01, P<0.01) were present, DFM effects were abated by MON, for rate, total gas production and total VFA concentrations. Acetate:propionate ratio was decreased (P<0.01) with MON and was unaffected by DFM. Ammonia-N concentration was increased (P<0.01) by DFM and unaffected (P=0.75) by MON. Both DFM and MON treatment increased (P<0.01) ruminal pH levels. These studies suggest the effects of DFM and MON of in-vitro fermentation are dependent on the substrate being fermented and the observed interactions provide means for further research.

本研究探討了收益率（earnings yield）和亞洲市場的長期政府債券收益率( long term government bond yield)的關係。並且運用結構性變異來以提高聯準會模型和股價的相關性。聯準會模型是用來判斷市場是否高估或低估股價或在其公允價值。本研究在亞洲十個主要市場進行實證研究，探討聯準會模型中不同的時間跨度的關係。結果顯示在亞洲國家，大盤的收益率和幾個月後的長期政府債券收益率之間有強關聯性。本研究通過迴歸分析研究來研究此模型的預測能力，並考慮不同的結構性變異檢定法ROC 和Bai_Perron檢定，結論顯示了ROC 檢定法更有效的偵測結構變異，提高聯準會模型的預測能力。 / This paper examines the possible relationship the earnings yield and long term government bond yield for the Asia markets. We apply structure break test to improve the Fed-model, which is used to judge whether stock prices are too high, too low or at their fair value. The paper examines the relationship proposed by the Fed- model with different time horizons. The findings reveal a strong association between long term government yield and the earnings yield in months later. The difference between the earnings yield and real bond yield is a shorthand measure for expected returns and we examine the predictive power of this measure by regression analysis. Considering ROC test and Bai_Perron test, it shows ROC test improves the forecasting power of Fed model with a better result.

Hannover, Universiẗat, Diss., 2007.