26,879 research outputs found
Ak-Sar-Ben Beef Seminar Ill
No full textOpening Remarks - Mr. Robert G. Volk
Objectives of 4-H - Dr. William E. Caldwell
Moderator\u27s Remarks - Dr. Frank H. Baker
Carcass Characteristics of Various Breed Crosses — Dr. Robert Koch
Production Committee Report - Mr. Chuck Schroeder
Judges Committee Report - Dr. Miles McKee
Marketing and Distribution Report - Mr. Carl Gardner
Education Committee Report - Dr. Joe Hughes
Summary of Ak-Sar-Ben Beef Seminar III - Moderator
News Release on Ak-Sar-Ben Beef Seminar II
The underestimated virtues of the two-sector AK model
No full textWe show that the two-sector version of the AK model proposed by Rebelo (1991) can be read as an endogenous growth extension of Greenwood, Hercowitz and Krusell (1997). By confining constant returns to capital to the investment goods sector, the model generates endogenously the secular downward trend of the relative price of equipment investment and the rising real investment rate observed in US NIPA data. Whereas Jones (1995) criticizes that the one-sector model fails to reconcile the empirical facts of trending real investment rates and stationary output growth, this incompatibility vanishes in the two-sector version. Finally, a simple technological shock can reproduce the ‘1974’ break in post World War II US data. Thus, AK-type endogenous growth models comply much better with empirical evidence, once they are augmented with a strictly concave consumption sector.AK model; embodiment; endogenous growth; obsolescence; ‘1974’
Spatial dynamics and convergence: the spatial AK model
No full textWe study the optimal dynamics of an AK economy where population is uniformly distributed along the unit circle. Locations only differ in initial capital endowments. Despite constant returns to capital, we prove that transition dynamics will set in. In particular, we prove that the spatio-temporal dynamics, induced by the willingness of the planner to give the same (detrended) consumption over space and time, lead to convergence in the level of capital across locations in the long-run.Economic Growth, Inequality, Spatial Dynamics, Convergence
Spatial dynamics and convergence: the spatial AK model
No full textWe study the optimal dynamics of an AK economy where population is uniformly distributed along the unit circle. Locations only differ in initial capital endowments. Despite constant returns to capital, we prove that transition dynamics will set in. In particular, we prove that the spatio-temporal dynamics, induced by the willingness of the planner to give the same (detrended) consumption over space and time, lead to convergence in the level of capital across locations in the long-run.Economic Growth, Inequality, Spatial Dynamics, Convergence
AK-1, a Sirt2 inhibitor, alleviates carbon tetrachloride-induced hepatotoxicity <i>in vivo</i> and <i>in vitro</i>
No full textBackground/Aim: Acute liver injury (ALI) is a life-threatening clinical syndrome that is usually caused by toxic chemicals, drugs, or pathogen infections. Sirtuin2 (Sirt2), an NAD+-dependent deacetylase, appears to play detrimental roles in liver injury. Here, we evaluated the therapeutic application targeting Sirt2 in carbon tetrachloride (CCl4)-induced ALI, by using AK-1 (a Sirt2 inhibitor). Methods: For in vivo experiments, a single injection of CCl4 was used to induce ALI. One hour later, mice were intraperitoneally injected with AK-1 and were sacrificed 24 h after CCl4 administration. For in vitro experiments, primary mouse hepatocytes were used to determine the effects of AK-1 on oxidative stress and hepatocellular death induced by CCl4. Results: AK-1 alleviated CCl4-induced ALI as confirmed by histopathologic analysis, and decreased levels of serum biochemicals and inflammatory cytokines. Although it barely affected the expression of hepatic cytochrome P450 enzymes, AK-1 attenuated CCl4-induced oxidative stress and its related cell death. Mechanistically, Sirt2 inhibition significantly increased the nuclear protein level of nuclear factor erythroid 2-related factor 2 (Nrf2), and meanwhile decreased phosphorylation of c-Jun N-terminal kinases (JNK), in normal and injured livers. Similar results were observed in vitro. AK-1 significantly attenuated CCl4-induced cytotoxicity and oxidative stress by up-regulating the activity of Nrf2, and down-regulating JNK signaling in hepatocytes. Conclusions: Our results suggest that AK-1 treatment attenuated oxidative stress and cell death in the ALI model, at least partially, via activating Nrf2 and inhibiting JNK signaling, and that Sirt2 inhibition might be a potential approach to cure ALI.</p
More Lessons from Taking an AK Model to the Data.
No full textWe take an AK model to the PWT data. In the model both technology (intratemporal) and investment (intertemporal) shocks determine the variation of the growth rate. In earlier work we looked at singular models where we extracted only the technology shock using the policy functions from dynamic optimality. Here we recover time series for both shocks for a panel of countries and we isolate what we believe are pervasive patterns in macroeconomic models and postwar data: a negative correlation between intra and intertemporal shocks, and a somewhat lesser role for the intertemporal shock.endogenous growth; technology shocks; investment shocks
Türkiye çocuk edebiyatında iki önemli isim: Sevim Ak, Behiç Ak
No full textAnkara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2018.This work is a student project of the Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.The History of Turkey course (HIST200) is a requirement for all Bilkent undergraduates. It is designed to encourage students to work in groups on projects concerning any topic of their choice that relates to the history of Turkey. It is designed as an interactive course with an emphasis on research and the objective of investigating events, chronologically short historical periods, as well as historic representations. Students from all departments prepare and present final projects for examination by a committee, with 10 projects chosen to receive awards.Includes bibliographical references (page 15).Bu makalenin amacı, çocuk öyküleri yazarı Sevim Ak ve Behiç Ak ile ilgili detaylı bilgiler vererek Türkiye edebiyatındaki yerlerinin önemini göstermektir. Bu makale, Sevim Ak’ın yazarlık kariyeri ve kardeşi Behiç Ak’ın sanatçı kişiliği ve Sevim Ak ile işbirlikleri hakkında bilgi veriyor. Makalemiz, Sevim Ak’ın hayat hikayesini anlatırken çocukluğundan itibaren bir yazar olarak gelişimini inceliyor, yurtiçinde ve yurtdışında elde ettiği başarılardan bahsediyor ve yazarlık dışı aktivitelerine de değiniyor. Behiç Ak ‘ın da karikatüristlik kariyerinden ve Sevim Ak ile işbirliğinden bahsediyor. Bu çalışma yapılırken ikinci el kaynakların yanı sıra Sevim Ak ile yapılan röportaj da kullanılmıştır.This article aims to demonstrate the achievements of the Turkish author, Sevim Ak and her brother Behiç Ak in Turkish literature. This article gives information about both Sevim Ak’ s and Behiç Ak’s career and Behiç Ak’s contribution to Sevim Ak’s works with his cartoons. Our project studies Sevim Ak and her brother’s childhood, Her career path, achievements in Turkey and overseas, and finally other projects she participated in. In addition, Behiç Ak’s career as a cartoonist is mentioned. Secondary sources and an interview with Sevim Ak as a primary source is used in this project.by Abdürrahim Özer
The Poverty of Linear Nations: Lessons from Taking an AK Model to the Data.
No full textThis paper takes an AK model to the PWT data. In the model, intratemporal and intertemporal shocks are reduced forms for different technologies, and determine the variation of the growth rate. Using the policy functions of the model we recover time series for the unobserved technology shock for a panel of countries. We can then evaluate both how well the model fits the data and what the contribution of the different shocks to the variation of growth rates is. We find that the data is largely inconsistent with the AK structure. However, we isolate what we believe are pervasive patterns in macroeconomic models: a negative correlation between intra and intertemporal shocks, and an ever increasing level of technology matched with ever cheaper consumption relative to investment.endogenous growth; technology shocks; investment shocks
New indices of geomagnetic activity at test: Comparing the correlation of the analogue ak index with the digital A h and IHV indices at the Sodankylä station
No full textAbstract We test here two recently proposed indices of geomagnetic activity, the A h index and the IHV index, which are based on digitally available hourly geomagnetic measurements. We study their correlation at different temporal scales with the Sodankylä ak index that is based on analogue registrations and exists since 1914. Even at the highest temporal resolution, the three-hourly A h indices correlate extremely well with ak (correlation coefficient = 0.873 for 243,374 points). Correlation is excellent at all local times, with correlation coefficients varying from dayside minimum of 0.81 to nightside maximum of 0.89, indicating that A h describes the local time variability of the ak index very reliably. Using daily averages the correlation between ak and A h is even higher (cc = 0.94) and considerably better than between ak and IHV (cc = 0.80). The standard deviation between daily averages of ak and the correlated A h is only 6.9 nT but as large as 11.9 nT for IHV. At the monthly resolution and longer, the IHV indices correlate with ak almost equally well as A h with ak. However, while the slopes of the best fit relations between ak and A h are nearly the same at all temporal resolutions (yearly, monthly, daily, threehourly), reflecting a highly linear relation between these two indices, the slopes between ak and IHV get consistently and significantly smaller with increasing resolution, indicating a fundamentally nonlinear relation between ak and IHV. These facts verify that IHV index is very different from all K based indices, including ak and A h , and strongly suggest that A h rather than IHV should be used as a longterm proxy or extension of local and global ak/K indices
Synthesis of Monoacylglycerol Rich in Polyunsaturated Fatty Acids from Tuna Oil with Immobilized Lipase AK
No full textThe aim of this study was to produce monoacylglycerols (MAG) rich in polyunsaturated fatty acids (PUFA), especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), by glycerolysis of tuna oil with lipase AK from Pseudomonas fluorescence immobilized on Accurel EP-100 (IM-AK). tert-Butyl methyl ether (MTBE) was the most suitable organic solvent after screening a list of different solvents and their mixtures. The optimum conditions for MAG production were: 10% w/v of tuna oil in MTBE; mole ratio of glycerol to tuna oil 3:1, water added 4 wt% in glycerol; the amount of IM-AK 30 wt%, based on tuna oil. The temperature was controlled at 45 degrees C. Under these conditions, with a 24 h reaction, the yield of MAG was 24.6%, but containing 56.0 wt% PUFA (EPA and DHA). Stability of the IM-AK was also studied. The hydrolytic activity of the enzyme remained at 88% and 80% of initial activity after incubating in MTBE for 24 h at 4 and 45 degrees C, respectively. The K-m and V-max values of the lipase-catalyzed glycerolysis of tuna oil in MTBE were found to be 19.5 mM and 2.71 mg MAG/min, respectively, for IM-AK. (c) 2006 Elsevier Ltd. All rights reserved
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