A New Approach for Feedback Control of Radius and Growth Rate in Czochralski (Cz) Processes Exemplarily Studied on LEC-InP

ABSTRACT A new method for the investigation of hypothalamo-pituitary-gonadal and adrenal feedback control mechanisms based on the biological neutralization of gonadal and adrenal steroids by active immunization is proposed. The regulatory influence of a given steroid in the feedback control is proved when reduction of the free, biologically active fraction of this steroid caused by antibody binding induces a positive response of the pituitary, thus effecting gonadal or adrenal hypertrophy and hyperfunction. The advantages and limitations of the new model are demonstrated by the effects of active immunization of rabbits with cortisol (F), aldosterone (Aldo), dehydroepiandrosterone (DHA), androstenedione (Δ4-A), testosterone (T), 5α-dihydrotestosterone (5α-DHT), 5β-DHT and oestradiol (E2). In the immunized animals and in a control group serum concentrations of total corticosteroids (TC), DHA, T, Δ4-A, E1, E2, LH and FSH, the percentage of binding of steroids in serum and the specificity of the antisera are determined. The testes are evaluated by histometry and the nuclear volume of the adrenocortical and Leydig cells is measured.

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A new approach for quasi-LPV modeling and state-feedback control of nonlinear systems with application on a 5-DOF pendulum

2021 American Control Conference (ACC) ◽

10.23919/acc50511.2021.9483001 ◽

2021 ◽

Author(s):

Gabriel P. Neves ◽

Fabio Y. Toriumi ◽

Bruno A. Angelico ◽

Ricardo C. L. F. Oliveira

Keyword(s):

Feedback Control ◽

Nonlinear Systems ◽

State Feedback ◽

State Feedback Control ◽

New Approach

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Evaluating the Malaysian economy 2009-2018: growth, development and policies

10.32890/9789672363149 ◽

2020 ◽

Author(s):

Irwan Shah Zainal Abidin

Keyword(s):

Growth Rate ◽

Financial Crisis ◽

Prime Minister ◽

Global Financial Crisis ◽

High Growth ◽

Substantial Impact ◽

New Approach ◽

Asian Tigers ◽

New Vision ◽

National Transformation

Malaysia was once on the cusp of becoming one of the Asian Tigers as a result of the impressively high growth rates recorded in the early 1990s. From 1990 until 1997, the growth rate was above 9 percent per annum on average. This performance came to an end when the economy was struck by the 1997/98 Asian Financial Crisis, the worst economic crisis Malaysia has ever experienced since independence. Things eventually worsened with the onslaught of the 2008/09 Global Financial Crisis, which dragged the Malaysian economy yet into another round of a recession with the growth rate contracting at 1.5 percent in 2009. On hindsight, these two events, which have had a substantial impact on the state of the Malaysian economy, pointed to several urgent calls for economic reforms, such as the need to address structural weaknesses of the economy and to have a growth target which is both sustainable as well as inclusive. When Datuk Seri Najib Razak became the sixth Prime Minister of Malaysia from April 2009 until May 2018, it was clear that a new approach to economic development for Malaysia had to be crafted. Towards this end, he introduced the National Transformation Policy (NTP), so that the economy can be transformed into one that is of high-income and developed status by the year 2020. He also set a new vision for Malaysia, also known as the 2050 National Transformation, or TN50, which is meant to chart a new course for Malaysia to move into the second half of the 21st century. How successful is this transformational agenda? What are the other issues and challenges which need to be addressed? What important lessons can we learn from this transformational journey? This book is an attempt to address these specific questions by assessing Najibs economic plans, policies, programmes and vision which evolved during the nine years of his term as the sixth Prime Minister of Malaysia.

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