Thursday, July 9, 2015

Daydreaming and enjoy the little things.
   I agree with the statement, the people should somethings do things that they do not enjoy doing.  It is true for several reasons. The worker do not pay very well, in consequently they are unhappy. This is a big and seriously problem In Latin-American countries. The worker, and special women, recipes low salaries.  This systems production is unequal. The companies transnational in Mexico have a “maquilas”. The maquilas are continuous and serial production sytems.  A high percent many us worker should working 24 hours per day. Obviously, the people do not enjoy doing. The worker do not free time for cure a families, always they are tired and awake at finish jobs.
   The other reason is that young people in the world are not valid options for work in their professions. They end up working on things that leaves unsatisfied. This situation are dangerous all societies, because the younger people do not enjoy, endangers the whole society. When as young people are the future of social systems and they ensure their survival of cultures.
    In positive in first world the younger people have different problems.  For example in USA some younger are a lot free time, many opportunities, good jobs, and good money, but they are busy trivial things. Young people are disenchanted because it has everything.
  In conclusion, governments and economic systems should take decisions to society beings rather than enjoy what they do. Bet on a more equal and balanced society have happier citizens. Humans must learn to enjoy the simple things. I think we must learn  daydreams.

https://ssl.gstatic.com/ui/v1/icons/mail/images/cleardot.gifDavid Lozano

Monday, June 29, 2015

IEC 61850 Standard for critical funtions
          

     Over the past five year, my research interest  have focused on improving and optimization of IED-based control and protection schemes for electric substations. I am particularly interested in the use of IEC 61850 Standard, and associate communication links as a reliable network for critical funtions, such as trip or interlocking signals. My work is around the main grid of Colombian  electric transmission network, where the design engineers had been very cautious and distrustful about the advantage of communication facilities of protective relays and control IED's. Traditionally communication protocols, as IEC 61850, had been accepted  only for non critical functions (remote control, state supervision, and alarms). However, trip and interlocking signals, which manage the principal system safety,  are designed with the old technology based on cooper wired circuit, under the moot pretext to be a proved technology. These approachs belong to past. Concepts relative to modern methods to manage functions in substation through IEC 61850 (e.g. process bus and sampled values) must be in the  next generation of substations. As adhering  to this stream at this point in my career, my primary interest in the inmediate future is to structure a coherent plan for use IEC 61850 Standard for critical functions in substation's control and protection schemes.



Friday, June 26, 2015

The decision of working at the academy

by: Juan Mejia


   Working at the academy was one of the most important decisions in my professional and personal life. Fourteen years ago, I was finishing my 18-moths bachelor’s thesis while I was looking for a job in Chemical Engineering.  By these days, there were not enough job offers because the Colombian economy was very bad. However, I succeeded in a job application at a car brakes company in Bogot√° until I had the interview. That was my first and last job application in my life for a company.  What was the reason? That morning, I woke up very early in the morning and travelled from Chapinero Alto to Fontib√≥n by bus (a 80 minutes journey), wearing uncomfortable  clothing (a suit).  I reached the company doors about 20 minutes earlier of the interview appointment so I had to wait outside, as if I were selling something. The interviewer was a very kind woman at her 50’s (I guess). She picked me up and walked me through the company production area. It was a large area with a lot of equipment. The production process was noisy and dusty, and very dangerous, not only because of the machines risks but also for the raw materials used in the process. One of these materials is Asbesto, a well-known cancerous material. I was not excited with the idea of working in that place. In fact, most of chemical, and related industries are similar. Then I realized that I did not want to work at industry.  It was a very stressful moment as I thought “I have spent 6 years of my life, just for that?”. I got depressed until I returned to Medellin, when I was hired by a new professor, Dr. Farid Chejne, as research assistant student in a research project related to alternative energy. After 6 months, I noticed that I loved what I was doing and professor Chejne suggested me to study a master in chemical engineering. In that moment, I got excited with the idea of having a professional life doing research and teaching. In summary, a little experience can change a whole life. I agree with the wise expression “nothing is free”.

The event that changed my life

            One of the most important event that changes my life was became a teacher.  When I finished my graduated studies in Chemical Engineering at the National University of Colombia, I had the opportunity to be hired as assistant instructor to teach Process Control. At this moment I had to teach my classmates. It was so hard, but I learned early the necessity of keep the role that the live gives you in this moment.  I am gratefully with the three professors who oriented me. Each one of them had his own style of teaching. This gave me the opportunity to consolidate not only my own style of teaching but also to share their material. It is known that in the 19ths, the access at the information made the difference and gave you more advantages. Since then I could learn more are more. All in all, I doesn’t conceive my live without teaching.


My research interest
 
 
       My main research topic is focused in the dynamics of chemical elements in Agricultural soils. The knowledge of pool of elements and ions movement in soils has a big importance in environmental and agriculture issues. The ions can be the nutrients that plant need for growing, on a hand, and can be the contaminants that moved throw soil reaching groundwater, on the other hand, producing pollution. My first research was about magnesium in soils cropped with coffee plant that exhibited deficiencies with these element. We stated that continuous potassium fertilization could drives a difficulty to the plant for uptaking magnesium, and the balance between the two nutrients was necessary to control magnesium deficiencies. Next, I was interested in knowing how much fertilizing was lost by lixiviation after the application in soils. There was a strong relationship between the clays types in soils and the amount of fertilizing moved out the soil. Soils developed from volcanic ash have not the ability of retain cations. Now I am interested in the behavior of heavy metals in soils, and why they can be took for the root's plant and translocate to their tissues, and became part of the food chain. This is a concern for the food security.
Research Statement
 
   My main research interests are related to the extraction and purification of bioactive molecules and food lipids, as well as the design of processes for a profitable utilization of food industry by-products.
 
   I have worked in various research projects, such as the valorization of lactose for producing lactobionic acid by means of a catalytic oxidation reaction using gold nanoparticles supported on silica mesoporous materials; the extraction of different food lipids and the design of process for obtaining functional lipids such as palmitoleic acid, and essential fatty acids. Actually, I am the director of a big project, whose main objective is the production of functional foods for pregnant and nursing mothers, and children belonging to the early childhood. Moreover, I am the supervisor of various master's students, whose projects include topics such as the production of fermented milks naturally enriched with essential fatty acids, the microencapsulation of special oils for applications in the food industry, the valorization of the by-products of some Amazonian fruits, etc.
 
   In the next future I just want to do a postdoctoral fellow in which I can use nanotechnology for food applications.
 

 
 Professor
 Sung Yung
 
Academic writing

David Lozano

 

The event that changed my life

  The  event that changed my life a lot is to have the first child.  In 1987 everything changed. My life changed when I knew a notice “I was going to be a father” .  In my twenties, I was a very carefree arts student. I had panic and I was bored. However I needed to be  thoughtful. As me That was going to be my life and destiny of my son?  I took prompt decisions. First , I was to get a steady job, but this was very difficult for my lack experience. So I opened a little business of making frames for other artist. Second, I wedded with Esperanza, she is my current wife. Third I told my parents, I was going to have a child. Finally I got a warmer and friendly apartment. Today I do not regret my decision, My son is a 26 year old, he is a science political. He accompanied by his brother Antonio whom was 18 years old. My life is properly organized and I can exercise my career as an artist and teacher. Until  the event changing  forever my life.