The Existence Solution to The Development Heat Equation With Some Conditions

We consider the development heat equation with initial boundary conditions. The uniqueness of the solution is hold by using the maximum-minimum principle and some reflection methods

Non-verbal Communication between Two Non-native English Speakers: Iraqi and Chinese

This study investigates non-verbal communications used by an Iraqi speaker to transfer meaning to a Chinese speaker and vice versa. Different situations, from Chinese environment, have been chosen and analyzed according to the body language movements. The study found out that although the two languages, Iraqi Arabic and Chinese, are differentiated in verbal languages; the two speakers can communicate and understand each other nonverbally. It is also evidence that non-verbal communication between the Iraqi and Chinese speakers is somewhat similar in spite of their two differentiated cultures, they could understand each other’s facial expression, gestures, proxemics, haptics, and Tactile

Pengaturan Tekanan pada RIG 38-714 dengan Menggunakan Metode Self-Tuning Fuzzy PI Controller (STFPIC)

Udara bertekanan merupakan salah satu variabel yang dikendalikan pada suatu industri proses. Namun variabel tekanan di industri sering mengalami perubahan beban, sehingga menyebabkan karakteristik dari sistem yang dikendalikan berubah-ubah. Dalam kasus ini, skema kontroler konvensional kurang mampu untuk mengatasi permasalahan perubahan beban. Self-Tuning Fuzzy PI Controller (STFPIC) merupakan salah satu skema sistem pengaturan cerdas yang dapat digunakan untuk menyelesaikan permasalahan perubahan beban. Pada penelitian ini, implementasi STFPIC dilakukan pada peralatan laboratorium Pressure Process Rig 38-714 dengan dipengaruhi oleh beberapa parameter diantaranya penentuan gain error, gain delta error, dan gain output. Hasil pengujian menunjukkan, ketika kondisi beban nominal dan kondisi adanya perubahan beban, STFPIC dengan parameter gain error = 0,33, gain delta error = 50, dan gain output = 0,05 memiliki performa yang paling mendekati spesifikasi yang direncanakan yaitu dengan hasil nilai error steady state = 0,13 %, nilai overshoot = 0 % dan settling time = 80,94 detik. Ketika terjadi kondisi perubahan beban, nilai error steady state = 0,56 %, nilai perubahan tekanan = 45,33 % dan time recovery selama 209 detik. =============================================================================================================================== Air pressure is one of the variables controlled in an industrial process. However, pressure variables in the industry often occurs changing of load, this can make a changes to the characteristic of controlled system. Conventional controllers scheme are less able to overcome the problem of load changes. Self-Tuning Fuzzy PI Controller (STFPIC) is one of intelligent control system scheme that can be used to solve load change problems. In this research, the implementation STFPIC performed on Pressure Process Rig 38-714 to be influenced by several parameters such as the determination of the gain error, gain delta error, and gain output. The test results show, when the nominal load conditions and load change condition, STFPIC with the parameters gain error = 0.33, gain delta error = 50, and gain output = 0.05 has the closest performance to the desired specifications with the results of error steady state value = 0.13%, the value of % overshoot = 0% and settling time = 80,94 seconds. When there is a load change condition, error steady state value = 0.56%, the pressure change value = 45,33% and time recovery = 209 seconds

Influence of nanomaterials on properties of lime and hemp/lime composites for energy efficient wall design

A mixture of thermal, porosity and compressive strength properties of lime based materials were determined after adding different percentages of nanomaterials to enhance performance (nSiO2, nClay and nZnO). Specimens were formulated for use in the design of a five layer energy efficient wall. Materials consisted of lime nanocomposites (used as ‘Renders’, properties determined were thermal conductivity () and porosity) and lime/hemp shiv nanocomposites for thermal isolation ('Insulators', ). A lime/hemp fibre nanocomposite, with PVAc glue for strength, was developed as a load bearing material ('Core', , strength). A solvent exchange method for drying the specimens was applied as soon as practically possible to investigate if rapid drying could be considered without adverse effects. Results showed that the maximum 28 day decrease in for the Render was by using 4% nZnO, being -18% compared to the control sample. The same render also exhibited the lowest density. For the Insulator, λ was -31% when also using 4% nZnO in comparison to the nanofree specimen. Strength of the Core exceeded 10 MPa, much greater than the minimum load bearing requirement. The paper concludes by comparing the U value of a wall utilising these findings to those from an existing lime/hemp design

Digital Single Phase Power Factor Optimizer Based on FPGA

In this paper, an FPGA (Field-programmable gate array) model of digital single phase power factor optimizer has been built. The proposed optimizer is based on measuring the phase shift time between voltage and current waveforms. Therefore, it is required to reduce this time to make the voltage and current waves in phase as possible. Thus, the power factor will be in maximum value (closed to unity). The process of improving the power factor is carried out by connecting a set of capacitors in parallel with the load. The proposed power factor optimizer has been built using VHDL (Very high speed integrated circuit Hardware Description Language), simulated using Xilinx ISE 9.2i package and implemented using Spartan-3A XC3S700A FPGA kit. Implementation and Simulation behavioral model results show that the proposed optimizer satisfies the specified operational requirements and reflected impressive results when applied to different loads

Influence of nanomaterials on properties of lime and hemp/lime composites for energy efficient wall design

A mixture of thermal, porosity and compressive strength properties of lime based materials were determined after adding different percentages of nanomaterials to enhance performance (nSiO2, nClay and nZnO). Specimens were formulated for use in the design of a five layer energy efficient wall. Materials consisted of lime nanocomposites (used as ‘Renders’, properties determined were thermal conductivity () and porosity) and lime/hemp shiv nanocomposites for thermal isolation ('Insulators', ). A lime/hemp fibre nanocomposite, with PVAc glue for strength, was developed as a load bearing material ('Core', , strength). A solvent exchange method for drying the specimens was applied as soon as practically possible to investigate if rapid drying could be considered without adverse effects. Results showed that the maximum 28 day decrease in for the Render was by using 4% nZnO, being -18% compared to the control sample. The same render also exhibited the lowest density. For the Insulator, λ was -31% when also using 4% nZnO in comparison to the nanofree specimen. Strength of the Core exceeded 10 MPa, much greater than the minimum load bearing requirement. The paper concludes by comparing the U value of a wall utilising these findings to those from an existing lime/hemp design

INTERNATIONAL COMPETITION IN CENTRAL ASIA PERSPECTIVE IN INTERNATIONAL RELATIONS

Objective: The problem of the research was that Central Asia has strategic elements that helped to create a hidden conflict between international powers for the sake of the limit of influence and domination. Method:  The research likely used qualitative political analysis through a geopolitical lens, examining post-9/11 developments, international agreements, and regional dynamics involving the United States, European Union, and Russia. Results: The geopolitical movement of the United States, the European Union and Russia intensified after the events of September 11, 2001 , and the competition between these forces increased to strengthen their political, economic and military influence, in light of the republics with fragile political, economic and military pillars that helped to attract international powers under the pretext of helping countries and overcoming the challenges they face. Therefore, multiple agreements were concluded that contributed to penetrating Central Asia, which raised the ire of Russia, which considered it a threat to Russian national security and fear of being surrounded and besieged by these countries and Western forces and their role in international relations. Novelty: Central Asia represents a strategic and geopolitical importance, due to its location and resources in the vital field of Eurasia , which is a buffer zone between Asian and regional powers, and the region represents a pivotal intersection point for international powers