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2018-01 04

[Event]Heavenly Winter at South Korea with Hanyangian Angels

The second HIWS (Hanyang International Winter School) drew the curtains open on December 28 of 2017 with the orientation for 300 international students from all over the world. For two weeks, students will be attending classes from HYU along with various cultural programs that the OIA (Office of International Affairs) and its HIWS volunteers, ‘Wingels’ (Winter Angels) have prepared. To celebrate the new year with the international students that are not spending the last day of 2017 with their family, the OIA and the Wingels organized the year-end party on December 31 of 2017. News H paid a visit to celebrate the new year with the HIWS participants. Wingels in Hanbok are posing with international students before the party. Festivity and energy One of the main events of the HIWS program was the year-end party which nearly all students, volunteers, and OIA staff participated. “This event was planned four months ahead in order to create an environment where all international students can become friends,” explained Park Ji-young of the OIA. As the party was on the fourth day of the HIWS program, there were various activities and games that required friendship and cooperation. HYU's dance team and Park Min-ji (Applied Music) are performing K-Pop music at the party. "Pop the balloons together and become friends altogether!" Beginning with the welcoming words from the OIA’s chief manager Lee Eun-ji, cheerful dance performances by HYU’s dance team and beautiful songs sung by Park Min-ji (Applied Music, 1) followed. With the lively hosting from the two emcees, Emile (Division of International Studies, 4) and Park Ji-young of the OIA, the party began. Main activities consisted of a quiz on HYU and Korea, balloon games, a dance battle, limbo, and learning K-pop songs. Two students from ‘Wingels’ also performed magic shows and EDM yoga to entertain their international friends. The final countdown to greet 2018 took place at the party at midnight where all students, ‘Wingels,’ and staffs gathered around with pounding hearts. “I was always interested in South Korean culture. I am extremely glad that HYU prepared such a great event for me,” laughed out Sheng Zien from Singapore. As 2018 began, all students returned to their residences to prepare for upcoming classes and cultural experiences for the remaining two weeks. Sheng Zien (middle) from Singapore is looking forward to more cultural activities that HIWS provides. Short, but fruitful program HIWS was first initiated on December of 2016 with around 100 international applicants for the program. Within only two years, the HIWS gained its popularity and acknowledgement for its fruitful cultural activities, guaranteed education, and interacting environment that OIA fosters. “The reasons behind the sudden increase in the number of participants are the high-quality lectures from diverse fields and trending cultural experiences,” explained Park. The lectures that international HIWS students can take are varied from science, business management, and literature to Taekwondo, K-Beauty class, and ceramics. Also, there are more cultural experience programs waiting for the HIWS participants, such as skiing or Nanta performances. Due to the grand size of the program, the main concern of the OIA was how to organize all events safely for students. However, due to the help of ‘Wingels,’ the start of the HIWS was successfully carried out. “There are a total of 25 Wingels, and each of them leads a group of international students. Their role is to introduce HYU and Korea while bringing the program to a conclusion safely,” said Park. “I am planning to participate in the exchange student program next year, and working as a Wingel helps me a lot to adjust in an international environment that I never belonged to before,” smiled Jang Hyun-ju (Economics and Finance, 3). "Happy new year!" Despite the brief period of the semester, HIWS is swiftly being acknowledged as one of the best winter school programs in South Korea. Global students still have two more weeks left to enjoy and learn more about Korea and various majors! International students interested in HIWS can view more information by clicking on the link found here. Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Choi Min-ju

2017-12 26

[Academics]Insensibility of Hosting the Olympics and Its Hidden Negative Impacts

When the IOC (International Olympic Committee) officially announced Pyeongchang, South Korea as the host of the 23rd Olympic Winter games on July 6 of 2011, the whole nation was overwhelmed with joy. However, where does the joy and glory arise from? Despite all of the positive economic effects that hosting the Olympics produces, there are also negative opportunity costs and hidden expenses. Professor Ahn Yong-do of the Division of International Studies reveals the hidden costs of hosting the Olympics that the national media do not promote through his paper: “The Leontief Matrix, the Keynesian Cross, and Economic Insensibility of Hosting the Olympics: A Survey of the Korean Experience.” Ahn analyzes the hidden opportunity costs of hosting the Olympics through his paper. There are various feasibility studies (an assessment of the practicality of a proposed national plan) to evaluate the benefits and costs of hosting mega-events like the Olympics, Asian Games, and World Cup. For example, state-run research institutes use the Leontief Matrix or Keynesian Cross models to analyze the costs and benefits of hosting such events. Leontief Matrix is an input-output model which predicts the proper level of production of goods and services while the Keynesian Cross describes the relationship between an aggregate demand and the GDP (Gross Domestic Product). However, there are extensive flaws in such research methods, which Ahn depicts. “Such research methods are extremely inappropriate for national research institutes to utilize when predicting the benefits and costs of mega-events like hosting the Olympics. These events are macroeconomic, while the methods mentioned above are a closed-system and microscopic,” explained Ahn. Along with its problems of economic scope, the data accumulated by such research is exceedingly outdated and are also exorbitant to run the test. “The best option is to utilize the holistic cost-benefit analysis as a feasibility test which discovers and calculates all the hidden opportunity costs of hosting such events,” said Ahn. The most important criteria to consider when deciding to host an event in accordance with the national budget is the long-term productivity of the social overhead capital. “Let’s assume that we have a limited budget in our nation and we can either choose to build childcare facilities in a number of companies or to host the Olympics. Unlike what the media promotes, an increase in the GDP and job creation effects are merely similar between those two activities. Then, considering the long-term effects, obviously building childcare centers would be more plausible,” explained Ahn. Hosting mega-events like this year's Olympic games is not practical in the long-run, according to Ahn. Ahn also described another real-life example from the 2002 FIFA World Cup that proves macroeconomic risks in hosting mega-events. “In order to host the World Cup, South Korea constructed 10 stadiums in Sangam-dong that still require the national budget of 5 billion won as a fixed cost annually. However, when citizens use the airport highway, we have to spend our own money at the tollgate to support its construction costs which the government must have secured as its mandate budget. Comparing these two incidents, building an airport highway is more productive than hosting the World Cup in the long-run since we do not utilize the stadium as much as we demand highway usage,” described Ahn. The journey to produce this paper was arduous according to Ahn. Because the contents of the paper criticize the media and the government and their behaviors of covering people’s eyes, the procedure to find data to disprove the governmental decision was difficult. “I had to discover evidence for this paper through sometimes unofficial, desperate ways since the national research institutes would not provide the data passively. Thus, my research began in 2002 and was finally brought to a conclusion, just recently,” reminisced Ahn. Even though Ahn’s major is business management, his passion towards economics is extensive. “I am not an economist, but an economic learner. Economics is the most logical study in political science subjects which maintains my passion to reach forward,” said Ahn. Currently, Ahn’s goal is to produce his own version of books on the principles of economics in a groundbreaking way, similar to Paul Samuelson. “Students of Hanyang University are intelligent and passionate. But, I hope they stay out of the library and experience real life, which is the source of creativity!” Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Kim Ju-hyun

2017-12 07

[Event]HYU Engineering Women’s Night

In the 21st century, the world is swiftly changing with automation and data exchange through advanced technology, and we call this the era of the Fourth Industrial Revolution. Despite the fast development of technology, South Korean society is still lacking social advancements and recognition for women. WE-HY (Women in Engineering at Hanyang Center) is a proud platform of Hanyang University to support women in the engineering field to sustainably reserve their rights at work without any disadvantages like career discontinuity. In order to let junior female engineering students of HYU communicate with leading female role models in the engineering field and to learn about becoming scientifically outstanding leaders, WE-HY hosted an annual event-- the 2017 Homecoming Day of Women in Engineering at Hanyang. WE-HY (Women in Engineering of Hanyang University) Center is annually hosting the homecoming day event in December. Words from past, words for future The homecoming day event began in 2016 as a part of HYU’s cultural and infrastructural development program and has celebrated its second year of hosting the event. “With the help of student supporters from the Division of Engineering and numbers of seniors from various fields, our event is expanding its influence, size, and value,” said Kim Sung-ha, a researcher of WE-HY. For the homecoming, juniors and seniors united and cooperated together to successfully organize the event. The curtain of the homecoming rose with the special performance from the student band from the departments of Information Systems, Electronic Engineering, and Computer Science. With kind greetings from Oh Hyeon-ok, the WE-HY representative, seniors of HYU gave words of supports to the juniors. “When I was studying at HYU, I was one of the very few female engineering students. I was always in the middle of the spotlight simply because I am a woman. But, I learned through my experience that female engineers have strength in delicacy and emotional intelligence which will lead all my juniors into a great path,” said Lee Jin-sung (Ceramic Engineering, '60). Senior engineer of HYU, Lee Jin-sung, was invited as a guest speaker to share her experience and knowledge to the junior students. Another graduate speaker was Kim Ji-yeon (Computer Science, '05) who is currently working at Samsung SDS. “One thing I realized from my juniors is that they fear to take a break in their college life worried if they will have to face fiercer competition later. But, I think they should relax in their race to find out who they are, and where their interest truly lies in,” emphasized Kim. Another guest speaker Kim Ji-yeon gave a speech on social barriers that female engineers may have to face and suggested ways to develop strengths within them. Generations embraced At the homecoming event, all generations of HYU's engineering departments gathered around to communicate and share their opinions and experiences. Female seniors currently working at the engineering field got the opportunity to learn how their juniors think and what kind of social pressure stresses them out. “I am glad to meet the youth and the future of our school through this homecoming event. I wanted to share my experience of working as a woman to my juniors that there are still numerous social barriers against us in Korea. However, we can still face them by strengthening our own advantages and making them our own characteristics,” explained Kim Se-hee (Industrial Engineering, '08). Junior women of HYU were also able to discuss with their seniors on the current social environment they belong to. By exchanging knowledge and experience throughout the broad generations, female students of the engineering division were able to grasp more empirical understanding of the environment they could face in the upcoming future. “I learned how my seniors developed their own advantages and strengths to become the best in their fields despite the disadvantages they faced. This homecoming event has provided me tremendous opportunities to learn more,” said Yang Chae-eun (Information System, 2nd year). Seniors and juniors of the Department of Information Systems have gathered around at one table to communicate with each other. The homecoming night supported female engineers of HYU to learn how to improve their strengths. For future generations to study and work in a better environment, WE-HY will keep expanding their frontier programs to sustainably help and support Hanyangian female engineers. Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Choi Jin-myung

2017-11 15

[Academics]Advent of Geometrically Controlled Micro-tissue

When certain parts of a human body are damaged, the only treatment is to take medication to either halt the worsening or alleviating the agony. However, medical technology to fully recover the organs by developing thermally expandable hydrogels (a network of polymer chains that are hydrophilic, often used for the care of wounds) is becoming potential. Professor Shin Heung-soo of the Department of Bioengineering has lighted upon the possibility to control the cell patterns to harvest geometrically regulated micro-tissue through his research “Microcontact printing of polydopamine on thermally expandable hydrogels for controlled cell adhesion and delivery of geometrically defined microtissues.” Shin has been researching in the geometrically controlled micro-tissue field for 20 years, attempting to discover the full recovery of human tissues and organs. The fundamental finding of this research is that human cells can function through metabolism and, thus, can also generate spontaneous curative powers. “The main theme of our research is that we discovered our own method to discharge the damaged cells and entirely recover and replace them back to where they belong,” said Shin. The research team utilized the hydrogels to transfer the cells by patterning the polydopamine. PD (polydopamine) is an important substance in this research which is formed by oxidation of dopamine often used for coating various surfaces. Until now, the medical industry’s best option to treat damaged cells or organs made up of them was to inject cells floating inside a culture fluid (the fluid used as a medium for growing microorganisms). However, Shin’s research is now stepping ahead to actually maintaining the patterns and shapes of actual cell structure and transferring them into the human body. “My research can resemble the method of a paper tattoo. When you get a paper tattoo, you apply a paper with a desired picture, drop water on it, and, after some time, the picture is embedded onto the skin cells. My discovery works the same way in that the paper is hydrogel,” stated Shin. The main focus of this research is that not only is the hydrogel transferring the basic patterns but also shapes. The transfer of shapes in the three-dimensional form, requires a specific code and environment of the cells’ patterns and placement. Through experiments with artificial models and mice, the research was proven to be valid in that micro-tissues were readily translocated in vivo to the subcutaneous tissue of mouse. A diagram of Shin's experiment proves that micro-contact printing of polydopamine on hydrogels has worked out by the successful transfer. (Photo courtesy of Shin) This extensive research took one year to complete by Shin and his two doctoral students. The research began with their considerate worry concerning the aging society. “As the population is aging with a higher average life expectancy, people are constantly suffering from chronic diseases and degenerative conditions. To solve this problem, instead of stopping diseases from worsening, I began this research,” said Shin. Before Shin’s research, the only possible method to entirely cure or recover damaged organs was by internal organ transplant. However, the medical and technological fields can now expect to cure endemic, chronic diseases eternally. “I have researched in this field for about 20 years under the belief that science and medicine will be able to treat humans for good,” revealed Shin. "Discover your own path that nobody has walked on. You will be able to find the light when your ideas are developed with your efforts and concerns!" Shin’s ultimate hope is to furnish his developed micro-tissue technology to easily accessible places like hospitals and pharmacies. “In this Fourth Industrialization era, I can now graft new technologies like 3D printing skills or big data to produce efficient and exquisite results,” emphasized Shin. “Even though South Korean society highlights the importance of living a stable, routinized life, I believe that our Hanyangian students have inexhaustible ideas and potential. I hope our future generation will be able to utilize their ideas and dream bigger!” Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Kang Cho-hyun

2017-10 04

[Event]When Altogether, You Are Never Alone

When the season comes for farmers to harvest crops and fruits treasured with their sweat, it is the best time to throw a party. Koreans named this day of invaluable delight, Chuseok- Korean Thanksgiving that comes every August 15th of the lunar calendar. While Chuseok presents Koreans with blissful moments to enjoy traditions, a large number of international students often get lost on what privileges this day delivers to them. In order to help the international students learn more about Chuseok and how to enjoy it, the Division of Engineering and the Office of International Affairs (OIA) prepared discrete Chuseok festivals. Berk Gebes (English Language Education, 2nd year, left) and Shalom Oruma (Division of International Studies, 1st year, right) are trying on a hanbok. On the right, caligraphy is done by one global student who says, "Big things begin small." Invitation from the Division of Engineering The Division of Engineering invited all of the international engineering students studying at Hanyang University (HYU) to experience and learn more about Chuseok. The event was held on September 26, 2017 in front of the Engineering Building and lasted for a 150 minutes, beginning at 12 PM. In order to provide a unique experience for foreign students who can’t easily access special Korean culture, the Division of Engineering included a total five booths for the Chuseok adventure. The first booth was a traditional food festival, including songpyeon (half-moon shaped rice cake served only during Chuseok) and sikhye (sweet rice drink). Also, a booth for trying out Korean traditional clothes- the hanbok was prepared. Students received the opportunity to learn about the various colors and shapes of the hanbok. The next expedition was a traditional folk game. The most interesting game that intrigued the students’ attention was a slap-match game, also called ttakji. The runner-up of this match was Hafiz Omer (Electronic Engineering, 2nd year) from Malaysia, who recalled this game as the best experience in this event, saying, “it was a great experience for me since we don’t have such a game in Malaysia. Also, trying on the Hanbok made me feel like a king due to its silky texture and vivid red color.” The Dance Club of the Division of Engineering "Bunpuri" is performing samulnori (left), and international students are enjoying traditional Chuseok food (right). The program also included a booth for making Korean traditional masks and folk-painting bags. This program introduced a new concept of Korean masks and folk-painting and allowed foreign students to easily experience the culture in a more exciting way. Along with various programs, the samulnori performance (Korean traditional percussion quartet) was also displayed by the Dance Club from the Division of Engineering- Bunpuri. “I love Korean culture, and the samulnori performance was also fascinating. I am especially impressed by Arirang, the Korean traditional song,” said Dilmac (Department of Computer Science, 3rd year) from Turkey. Complete all the Chuseok quests and win the prize The OIA has been preparing Chuseok events for international students of HYU every year. This program took place at the entrance of the International Building on September 27, 2017. “The purpose of this program is to let the foreign students spend the long Chuseok holidays together since most of them are here in Korea alone,” said Yang Ji-young, event supervisor of the OIA. Along with members of the OIA, Global Saranghandae (international HYU ambassador) and Welcome Handae (volunteer group for international students) members also helped global students learn and be more adjusted to Chuseok culture. The program consisted of trying on hanboks, writing words of Chuseok wisdom in individual’s calligraphy style, folk games, and a traditional food booth. Once individuals were confirmed to have completed all the activities, the OIA gifted them with traditional presents. Global students passing by the International Building could try on a colorful hanbok with a cup of sikhye in their hands, and songpyeon in their mouth. “I think the hanbok looks good on me, due its beautiful colors. I had to study for this year’s Chuseok holiday, but this event gifted me a great memory to dwell upon,” said Berk Gebes (English Education, 2nd year) from Turkey. International students are playing folk games - jegichagi (left) and tuho (right). Also, folk games such as tuho (traditional game of throwing sticks into canisters) and jegichagi (Korean shuttlecock game) drew the attention of foreign students. The calligraphy corner, where international students could experience writing well-wishing remarks for each other on picture scrolls, was also crowded. “I especially loved tuho, despite the fact that I missed out all the marks! Even though I miss my family in Nigeria, staying here with my friends during Chuseok through this kind of event definitely cheered me up,” said Shalom Oruma (Division of International Studies, 1st year). Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Kim Youn-soo

2017-09 27

[Academics]Low Energy Consuming Utilization of Chemical Sensors

When a chemical sensor is embedded into a mobile device, the significant sensing properties are amplified by low costs, high response, great stability, and robustness. However, there is one property of a chemical sensor that hinders technicians from utilizing it with a mobile device--unbearable power consumption. In his paper, “Self-heating effects on the toluene sensing of Pt-functionalized SnO2-ZnO core-shell nanowires,” professor Kim Hyeon-woo of the Division of Material Science and Engineering proposes a self-power sensor that allows low energy consumption of 31 μW at 5 V. Kim is explaining about the novel discovery of his research. In order to apply chemical sensors to mobile devices, the temperature of the sensor should be high enough to be generated. However, in the process of raising the temperature, the magnitude of energy consumption is vast. “Chemical sensors have extreme advantages such as cheap costs, small size, excellent stability, and robustness. However, the high energy consumption prevents scientists to consider them as an option for mobile devices,” said Kim. To reduce the energy consumption, Kim and his fellow researchers have exhibited a self-heated nanowire sensor through this study. “For the reduction of energy usage, we synthesized Pt nanoparticle-functionalized SnO2–ZnO core–shell nanowires. The shells of these wires utilized for the chemical sensor are thicker than usual. This allows a larger self-heating ability and a higher sensor response,” explained Kim. SnO2–ZnO is a synthesis of tin dioxide and zinc oxide that results in a strong core-shell (class of materials which have properties intermediate between those of small, individual molecules and those of bulk, crystalline semiconductors). The total energy required for this chemical sensor to be self-heated was 31 μW at 5 V. “This novel discovery was possible due to the groundbreaking nanowires that allowed the sensor to self-heat even at room temperature,” said Kim. Thus, this research, has ultimately suggested the potential application of chemical sensors into mobile devices, fully utilizing their peculiar sensing properties. “The sensor industry in South Korea will now be able to gain international competitiveness by exporting this novel sensor, which is currently in the process of development,” proposed Kim. Kim is holding a sensor that he's currently developing. The academic life of Kim has been devoted to nanostructure and sensors. His original research area was on nanostructure (a structure, especially a semiconductor device, that has dimensions of only a few nanometers). “I have always studied nanostructure, and I realized that the practical application of this leads to sensors,” explained Kim. Gas and radioactive sensors are Kim’s further research subjects, which he looks forward to utilizing in real life in a few years. “Pragmatic application of dramatic discoveries in research is difficult, but I will try my best to improve this industry,” revealed Kim. Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Choi Min-ju

2017-09 11

[Event]Find Your Perfect Job, Bright Future!

"The desire of Columbus for the discovery of the world is reenacted through Hanyangians!” Here is the ambitious motto of the Job Discovery Festival of Hanyang University (HYU) in the era of exacerbating unemployment. Every September, the Career Development Center (CDC) and the Office of International Affairs (OIA) design and host the Job Discovery Festival to provide students of HYU a chance to seek information and real life stories on 154 companies and occupations in South Korea. News H visited the event held on the 5th and 6th of September to become a Columbus of the job market. Both local and international students are zealously paying attention to the recruiters and their consultation. Discovery of occupation, summary of information This year, 154 companies have participated in the career fair, which was a 23 percent increase compared to last year. The most intricate part of the fair was that it prevented any exclusion of students in employment as its theme this year was ‘diversity.’ Along with the booths for Korean students, designated booths for the handicapped students and foreigners were also prepared. The fair included individual consultation with the recruiters, providing truthful information that cannot be found on official reference. Professional advice for employment documentation that many students find difficult to prepare was also given. “The Job Discovery Festival has always provided great opportunities for students to comprehend more specific information on companies while recruiters can meet their possible candidates through the fair,” said Shin Yong-jin of the CDC. The fair is hosted every September, considering the primary employment season of South Korea. “The main reason to hold the festival in September is because of two reasons. First, majority of Korean firms recruit personnel in the second semester, and second, the CDC believes that this fair will arouse students’ attention on the beginning of term,” reminded Shin. Out of the 154 firms who participated, 12 of them were active in recruiting handicapped students. The booth for the disabled students was arranged to explain to them the spectrum and the process of employment. Also, several Japanese companies also took part in the fair to employ Korean students due to the aging population. “The place, exclusively prepared by the OIA for foreign students, provides them deeper information on careers they could pursue in South Korea with all the information translated in various languages for their convenience,” explained Park Jin-ju of the OIA. Advice from the bottom of alumni’s heart The recruiters of the fair from each company were mostly graduates of HYU. As the Job Discovery Festival was gaining momentum, juniors and seniors flocked together to hear sincere advice from the alumni. “It was a great experience for me to learn about the plethora of firms in Korea. Also, information that cannot be found online was provided by our alumni recruiters along with their heartfelt encouragements,” said Hwang Jong-min (Earth Resources and Environmental Engineering, 4th year). Also, Umeh Zeno from Nigeria (Economics and Finance, 1st year) remarked, “even though I was only a freshman, I could learn a lot about employment and its process here in South Korea. I was impressed with the fair’s scale and I wish to visit here again annually.” Umeh is meticulously observing the employment process of the LG Company. Numbers of alumni gladly welcomed their juniors to their career booth. Kang Min-chang (Department of Mechanical Engineering, ‘14), currently working at SK Plant-Mechanical Team, has also disclosed his sincere advice to his juniors. “I remember wandering around at this festival, desperately looking for where I wanted to be employed two years ago. I am happy to be here now, helping my juniors with their career, and I’ve been advising them to apply their full strength at the interview to make a good impression on employers,” said Kang. Kang wishes that Hanyangians who successfully obtain employment will gladly help their own juniors for their future. The Job Discovery Festival of 2017 was packed with students, revealing the reality of the high unemployment rate. South Korean and foreign Hanyangians willing to be employed locally may have to be faced with moments of failure. However, numbers of frustration cannot defeat the sense of accomplishments in further life. Just like, after the storm--comes calm. The future of Hanyangians will shine bright despite the hard times of this era! Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Choi Min-ju

2017-08 08

[Academics]Founding Father of the Pragmatic Application of Stepping Motors

Every moving object needs a power plant. In the industrial world, permanent magnet stepper motors are widely used, which are designed with permanent motor (PM) rotors that are commanded by electrical pulses. In his paper “Nonlinear H2 Control for a Nonlinear System with Bounded Varying Parameters: Application to PM Stepper Motors,” Chung proposes a new nonlinear H2 controller for the PM motors that can increase the efficiency both in its speed and practicality. Chung is the pioneer in South Korea to discover new methods of applying nonlinear H2 control for a nonlinear system. Utilization of the PM motors vary from household purposes such as printers to industrial purposes such as gas systems and cars. Since its earlier usage from the 1970s, these motors have thrown questions to scientists and engineers on its formula. “Despite the fact that these motors are popularized in the industry, there are constraints in the PM motors, such as speed restriction,” said Chung. To solve this problem, engineers have discovered the DQ (direct quadrature) transformation of the motors which is a tensor that rotates the reference frame of a element vector matrix to simplify the analysis of it. “My research team has found that DQ is comparatively inefficient in terms of energy saving and cost control. Thus, we detected a new mathematical method to replace the DQ transformation,” said Chung. Often times, engineers used the linear system to control the PM motors. A linear motor is an electric motor that has its stator and rotor unrolled, so that instead of producing a torque, it produces a linear force along its length. However, linear motors are not necessarily straight, which causes restrictions in speed. “Formula of the linear system consists of homogeneity and additivity, and the main point of our research was to minimize the relationship between them using the H2 control system,” emphasized Chung. This FOC (Field Oriented Control) with the H2 system went through an experiment with other traditional methods for a comparison. “The results were outstanding as more simplified version of mathematical calculation and less usage of sensors beforehand were required, while the tracking errors and energy cost were reduced respectively,” said Chung. The green line of case 3, which uses the FOC (Field Orientation Control) of the H2 control shows the extreme distinction in tracking errors. (Photo courtesy of Chung) The most desired application of this method is on the intelligence vehicle, which is a car that can drive by itself without any interference of a driver. “Learning about the motion control, which is the main issue of my paper, is the most important criteria of designing a self-driving vehicle. This study allowed me to grow this industry rapidly in five years,” astonished Chung. Currently, Chung’s research lab for the intelligence vehicle based on motion control is the best in Korea which acquire all the knowledge on the sensors, actuators, and control algorithms. Chung’s passion for science was conspicuous from the days he used to make a radio on his own. When he started gaining interests in engineering, motion control grabbed his sight. “The stepping motors and their control system are fundamental technologies. I thought that developing them into pragmatic applications would be exciting,” reminisced Chung. Currently, Chung is passionately contributing to the scientific and technological advancement. For the visible result, he had launched the IEEE (Institute of Electrical and Electronics Engineers) ‘s CDC (Conference on Decision and Control) conference at Jeju Island, South Korea. “This is the first time ever that the CDC conference is being held in South Korea and I consider this the greatest achievement of my academic life so far,” smiled Chung. Chung is currently working on developing more advanced intelligence vehicles. Chung’s everlasting hope for his students is that they could study both science and liberal arts. “I wish South Korean educational system could teach students to embrace the joy of learning. This will eventually rear the bright sprouts of Korea,” said Chung. Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Choi Min-ju

2017-07 16

[Event]International Invitation from Hanyang University- HISS (1)

A month long, annually held exchange student program HISS (Hanyang International Summer School) welcomed the foreign students from all over the world on July 1st. HISS has met its 20th anniversary with nearly 2,000 international students in the program, which initially began in 1997 with 20 students. Standing out in all South Korean universities with the highest number of foreign participants, HISS of 2017 has drew up its curtain. The first culture experience program of Week 1 at HISS has been successfully ended. (Photo courtesy of the OIA) Catching two birds with one stone HISS has two goals to achieve for the provided month- academics and Korean cultural programs. Within only four weeks, it may seem hard to provide both educational and cultural programs to 2,000 foreign students. However, OIA (Office of International Affairs) of Hanyang University (HYU) has efficiently divided the academic workload and cultural experience program through subtle time management. “OIA has frequently established more lectures during the HISS which count up to 120 now. Also, enhancing the quality of the classes provided by HYU is another primary mission of ours,” said Angie Lee of the OIA. It included about 120 lectures on engineering, literature, international studies, and more. Weekly cultural programs for the exchange students are also planned by the OIA. On week 1, foreign students who were interested in Korean music, especially K-Pop, had a visit to the SM Town, which is a musical tourist site sponsored by SM Entertainment. On the second week, a friendship party was held on a cruise floating from Yeouido to Jamsil Han River Parks. Later on, OIA planned to escort the foreign students to an amusement park called Everland and a waterpark Carribbean Bay. Their last activity will be held at the Boryeong Mud Festival. Exchange students are enjoying their second activity of the HISS on the cruise. Students are smiling after experiencing various programs provided at the Cruise Party. The highlight of all activities was the cruise party, which News H accompanied with. The party took about two hours where students could enjoy the band performance, special foods, and the beautiful night view of the Han River. “This is my first time staying in Korea, and in Asia. I am enjoying the active atmosphere of Koreans and their unique culture. I’m also looking forward to the HISS programs every weekend,” said Elias El Araj from Netherlands. Also, Mika Auyezkhan from Kazakhstan showed her love for the Korean culture- “I was always interested in Korean culture and I am glad that I chose Hanyang University because it let me experience a lot in South Korea. I also love how they have solid educational structure.” Mountain to surmount Behind the delightful programs of the HISS, there are three OIA staffs and other volunteers who support the whole program. “As the number of participants is increasing every year, it becomes harder for us to manage all students’ circumstances like health. We already had a few visits to hospital with our students,” laughed Rick Punt of OIA. However, despite the augmenting size of the HISS program, OIA and HYU volunteers are paying careful attention to the students to prevent any accidents. “We are still proud that Lee, Punt, and I are leading the HISS, even though our July in calendar disappears completely,” said Min-joo Park of the OIA. “Without love for the HISS, I don’t think the program can be so successful. As we recap all students’ overall thoughts and reviews, we will constantly strive for the better HISS every year,” added Lee. Friendship between Korean volunteers of HYU and foreign students from the globe has become stronger through various activities. Aside from the internal difficulties, external factors such as international circumstances and the state of affairs also impact the HISS. “This year, students from the United States dwindled due to the recent North Korean crisis. However, number of Singaporean and Kazakh students augmented due to the increasing interests in the Korean culture,” said Punt. HISS, where unforeseeable and urgent situations sometimes take place, still remains as one of the best exchange program in South Korea due to the efforts people at the backstage put in. Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Choi Min-ju

2017-07 04

[Academics][Researcher of the Month] Ground Breaking Advancement in Medical Magnetic Robot

The era of robots wandering inside a human body for medical treatments is about to face our generation. Though the research is still in the process of developing magnetic fields and improving robots, the actual application of the medical robots is expected to occur in a decade. In his research “Magnetic Navigation System Utilizing Resonant Effect to Enhance Magnetic Field Applied to Magnetic Robots,” professor Jang Gun-hee of the Department of Mechanical Engineering proposes the improvement of the magnetic navigation system (MNS) via RLC (stands for resistor, inductor, and capacitor) circuit in the hope of its medical application. Generation of strong magnetic fields in high frequency When doctors treat for blood vessels related illness like coronary artery diseases or have to execute endoscopic surgeries, they often use catheters (thin tube made from medical grade materials) controlled by their hands and medical, empirical sensations. However, these catheters don’t have the sufficient controllability for the physicians due to their long, flexible wires. “The main point of this research was to minimize the surgical errors that these catheters may incur. So, we decided to make magnetic robots that are microscopic enough to wander inside our vessels,” said Jang. The types of robots currently in technical development are various- fish type robots, wobby-like robots, swimming robots, helical robots, and more. However, the magnetic robots especially intrigue the academia. “Compressed springs inside the robot will spread out, enhancing its drilling capability inside the vessels, which its movements will be guided by the magnetic system. Improvements in this MNS are significantly vital, as every mechanical motion of the magnetic robots is proportional to the external magnetic field,” emphasized Jang. Jang has been working on the magnetic navigation system research for about 12 years, which currently resulted in the torque magnetic field on the right. Through the experiments to unclog the blocked area of tubular environments, Jang and his students researched on a novel MNS with the resonant effect of the RLC circuit. “Simply saying, these robots with the MNS have magnets. When the north pole of the magnet approaches another north pole, it will push, and vice versa in the case of the south pole. This is the simplistic picture of how the magnetic robots and the MNS are working,” said Jang. Advancement to this fundamental phenomenon, Jang refers to the "closed right hand rule" (Ampere Law that relates the net magnetic field along a closed loop to the electric current passing through the loop) to explain his research. “In our newly developed MNS, inside the diameter of 50 centimeters wide spherical environment, we can create and control strong magnetic field in any direction which eventually generates useful various mechanical motions of the magnetic robots,” highlighted Jang. Another unconventional discovery of Jang’s research is the application of resonant frequency in the RLC circuit to amplify the magnetic field of the robot. RLC stands for resistance, inductance, and capacitance which all are in the influential relationships in science. When the alternating voltage is increased, the resistance should be divided to flow the current. However, as the alternating frequency of voltage increases, the current decreases due to the inductance of the coil. “We eliminate the effect of inductance with the application of varying capacitance that leads to maximizing the current and the magnetic field in high frequency,” explained Jang. This phenomenon was able to generate fast drilling motion of the magnetic robot to unclog the blocked area of blood vessels. Furthermore, application of the MNS developed a crawling robot that can also deliver drugs into a human body, which Hanyang University gained its international patent of. (Video courtesy of Jang) Hopes for the scientific improvement It has been a decade since Jang has been working on this magnetic robot research. The beginning of all dates back to when his mother was hospitalized due to her coronary artery disease in the heart. “The doctor told me that the illness is genetic and I may also be in danger. So, I thought that rather than believing in the doctor’s hand and the catheter, I should believe in science to develop this surgical methodology and first test on me,” said Jang. During the several years that Jang has been working with his students, he also began to long for fostering his students and their success. “I was always interested in the concept of a motor since I was young. This academic desire eventually led me to become a scholar, but since I became a professor of many students and a father of two daughters, I began to be intrigued to their life-long academic achievements,” reminisced Jang. Ph.D students of the Department of Mechanical Engineering- Lee Won-seo (left) and Nam Jae-kwang (right), also participated in the research with their professor Jang. It is estimated that after more technical amendments of this mechanical robot, it will be capable of testing on animals, and then applied to human surgeries, which will take about a decade. During this journey to scientific achievements, Jang realized that efforts are what science really value. “Just like my students who endeavored all their desires to science to leap higher, I hope that the South Korean scientific academia will also hope for the brighter future,” reminded Jang. Kim Ju-hyun kimster9421@hanyang.ac.kr Photos by Kim Youn-soo