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August 03, 2021

serendipity.

August 03, 2021 0 Comments

 

i fall into his eyes suddenly
it's shines brightly, like the stars in the universe
and the moon brighten the darknesses

he's is more complicated than a maze.
but he calms me,
like a warm summer breeze

he's a form of serenity
and the proof of serendipity

but fallin love with him? it's full of insanity
and we couldn't handle it
with sense of responsibility.

July 27, 2021

"Love-Hate Relationship with Motorcycle" : Motorcycle Growth and Its Impact to Urban Society

July 27, 2021 0 Comments

Motorcycle usage and ownership has continue to increased in most of the Asian countries--especially in Indonesia-- due to motorcycle's low capital and operating costs. During the second decades, the amount of motorcycles in Indonesia has been growing very fast. Based on the data launched by National Statistics Board (2018), the motorcycles in use are more than 114,000,000 (one hundred and fourteen millions) or around 42 % of  the total population in Indonesia which reaches 269,000,000 (two hundreds and sixty nine millions) people in 2019.


The high number of motorcycle ownership in Indonesia is caused by various things. One of the reasons is that efficient motorcycles is a travel solution for middle to low class people. There is also logic perception that believes the increasing of motorcycles production will lead to higher national income and employment rate. Although the economic contribution of motorcycles industry and their uses are significant, there are contradictive facts, which are number of accidents involving motorcycles riders, traffic congestions, air pollution which can be harmful to health,  urban criminalities, uncontrolled behavior of motorcycle's rider and other following negative impacts.


It is not encouraging to note that most of the main streets in big cities are packed by tens or even hundreds of motorcycles every day, especially during the busy hours from 5.30 – 8.00 o’clock a.m. and from 3.00 – 6 o’clock p.m. This also happens in urban cities in Indonesia. The explosion in the number of motorbikes has made traffic jams in big cities even more uncontrollable. The capital city of Indonesia--Jakarta, also suffering chronic congestion due to growing vehicle numbers in the country. According to Tom Tom Traffic Index, the average congestion level in Jakarta was 61 % in 2017. By the rate, Jakarta is ranked 4th in the most congested city in the world. The ranking is exceeded by the city of Bogota (62%), New Delhi (62%), and the most congested city in the world is Mumbai (66%).


Based on study of App-based transportation firm "Uber", in collaboration with the Boston Consulting Group, Jakartans spend a longer time in traffic than citizens of other major Asian cities. The study reveals that drivers in Jakarta spend an average of 22 days a year in traffic. The number is higher compared to many other major cities in Asia, in which drivers spend around 19 days stuck in traffic. Capital Jakarta has long been noted for its heavy traffic congestion but other studies now show Bandung, Semarang, Surabaya and Yogyakarta to be suffering in this respect also. 


The high number of motorbike ownership rates in Indonesia caused complex problem to continue. Apart from increasing the level of congestion in urban areas, it also caused the level of air pollution and noise increased. One of the reasons is because motorbikes are not environmentally friendly. The fuel (BBM) residue of motorized vehicles was the main contributor to severe air pollution as 80 % of vehicles powered by diesel fuel operated from Jakarta Greater Area (Jabodetabek) to the capital. Transportation emissions comes from road transportation (90 %) and city pollution comes from the transportation sector (70 %). Pollutants produced by vehicle exhausts include carbon monoxide, hydrocarbons, nitrogen oxides, particles, volatile organic compounds and sulfur dioxide. These materials are certainly not good for the health of citizens and can also be life threatening.


Besides of caused environmental issue and air pollution, high amount of motorcycle also increasing the total of fatal accident in Indonesia. According to Asian Development Bank, there had been serious problems regarding road transportation safety in several developing countries, included Indonesia. There are some factors causing such issue, one of them is significant growth of motorcycles in those countries. Data from Statistica, during 2013 to 2019, the highest number of fatalities in Indonesia was reached in 2016, with over 31,000 persons dying in traffic accidents. The studies indicated that traffic accidents involving motorcycles which led to fatalities had placed a big portion from total accidents.


Moreover, there are many things that cause traffic accidents to motor-drivers. Some of them are due to Indonesian drivers' are not even obey the road rules and the regulations. They are not pay attention to the traffic lights, riding motorcycle with many hitchhiker, don't have any driving license, etc. Second, Indonesian drivers' do not priority the safety. They do not wear the safety riding gear or even a safety helmet and do not pay attention to motorcycle's speed. Last but not least, there is also miserable reality in Indonesia. In fact, many parents in Indonesia give motorbikes for their children who are still in elementary school. Eventhough, the age limit for using motorbikes has been regulated in Indonesian law. It is strictly prohibited to use motorcycle for minors. But, still, the parents even ignore the safety of their children. In addition, incresing number in motorcycle provoked an increase in urban crime. The term "pembegalan" or "begal" has become a common thing in Indonesia. "Begal" is a criminal activity where a person or group tries to forcibly rob a motorbike on the road.


However, besides lot of disadvantages, people still choose motorcycle. It caused generally of it's cheap price, flexible to use, easy to obtained, and also perception that the increasing of motorcycles production will lead to higher national income and employment rate. It is not wrongly established, but it cannot be denied that there are still more disadvantages in the use of motorcycle. People still have many accommodation options for traveling other than by motorbike.


Nowadays, public transportation management is getting better. There are several public transportation that can used in Indonesia. There are inter-city rail, KRL Commuterline rail, intergrated Transjakarta bus, MRT, LRT, etc. Along with the construction and improvement of the quality of public transportation, the use of private vehicles also decreased in 2020. That is proven by data from Tom Tom Traffic Index, the average congestion level in Jakarta slightly decreased to 36 % in 2020 (previously in 2017, had 61%). It's led to Jakarta being ranked 31st in the Traffic Index Ranks of Urban Congestion Worldwide.


Motorcycle utilization and proprietorship has kept on expanding in the vast majority of the Asian nations - particularly in Indonesia. It caused of motorcycles is a travel solution for middle to low class people in Indonesia. The increase in the number of motorcycle also give various negative impacts on the environment, health, social and drivers' safety. It caused number of mishaps including bikes riders, gridlocks, air contamination, metropolitan culpabilities, uncontrolled conduct of bike's rider and other after negative effects.


March 19, 2021

How to Read Scientific Article Easily

March 19, 2021 0 Comments

 1. Begin by reading the introduction, not the abstract.

The abstract is that dense first paragraph at the very beginning of a paper. In fact, that's often the only part of a paper that many non-scientists read when they're trying to build a scientific argument. (This is a terrible practice. Don't do it.) I always read the abstract last, because it contains a succinct summary of the entire paper, and I'm concerned about inadvertently becoming biased by the authors' interpretation of the results.

2. Identify the big question.

Not "What is this paper about?" but "What problem is this entire field trying to solve?" This helps you focus on why this research is being done. Look closely for evidence of agenda-motivated research.

3. Summarize the background in five sentences or less.

What work has been done before in this field to answer the big question? What are the limitations of that work? What, according to the authors, needs to be done next? You need to be able to succinctly explain why this research has been done in order to understand it.

4. Identify the specific question(s).

What exactly are the authors trying to answer with their research? There may be multiple questions, or just one. Write them down. If it's the kind of research that tests one or more null hypotheses, identify it/them.

5. Identify the approach.

What are the authors going to do to answer the specific question(s)?

6. Read the methods section.

Draw a diagram for each experiment, showing exactly what the authors did. Include as much detail as you need to fully understand the work.

7. Read the results section.

Write one or more paragraphs to summarize the results for each experiment, each figure, and each table. Don't yet try to decide what the results mean; just write down what they are. You'll often find that results are summarized in the figures and tables. Pay careful attention to them! You may also need to go to supplementary online information files to find some of the results. Also pay attention to:

The words "significant" and "non-significant." These have precise statistical meanings. Read more about this here.
▪ Graphs. Do they have error bars on them? For certain types of studies, a lack of confidence intervals is a major red flag.
▪The sample size. Has the study been conducted on 10 people, or 10,000 people? For some research purposes a sample size of 10 is sufficient, but for most studies larger is better.

8. Determine whether the results answer the specific question(s).

What do you think they mean? Don't move on until you have thought about this. It's OK to change your mind in light of the authors' interpretation -- in fact, you probably will if you're still a beginner at this kind of analysis -- but it's a really good habit to start forming your own interpretations before you read those of others.

9. Read the conclusion / discussion / interpretation section.

What do the authors think the results mean? Do you agree with them? Can you come up with any alternative way of interpreting them? Do the authors identify any weaknesses in their own study? Do you see any that the authors missed? (Don't assume they're infallible!) What do they propose to do as a next step? Do you agree with that?

10. Go back to the beginning and read the abstract.

Does it match what the authors said in the paper? Does it fit with your interpretation of the paper?

11. Find out what other researchers say about the paper.

Who are the (acknowledged or self-proclaimed) experts in this particular field? Do they have criticisms of the study that you haven't thought of, or do they generally support it? Don't neglect to do this! Here's a place where I do recommend you use Google! But do it last, so you are better prepared to think critically about what other people say.