Acknowledgment:

This essay is finished by Chenchen Zhou, Andrew Chen, Yuliang Li. The publication is allowed by the authors.
This essay is only for academic use. Please do not take it for business use.

Introduction

The underground market for organ trade takes its existence to bring huge profits for the traders due to the urgent demand from patients. Yet, the unregulated gray industrial chain may result in criminals and other problems. Despite the existence of consent from the donors, the removal of their organs always leads to harmful and unrecoverable outcomes. Meanwhile, as some medical experts may also emerge as potential criminals…


How Singapore Defeated COVID-19 and some Economical and Ethical Reflections.

In Dec 2019, an unprecedented disease was identified in Wuhan, China. It did not get enough attention in the beginning. Later, the number of reported cases surged, and scientists reported that this disease is contagious and can be transmitted among people. The Chinese government soon claimed nationwide lock-down, especially in the provinces that have most cases, like Hubei province. Flights between China and other countries were canceled except the very important ones. Due to the characteristics of the virus, scientists names this pandemic COVID-19, as known as SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2). Meantime, the FDA did not begin…


Note:

This article would be the first page of a series. The whole series would be based on the Batman Trilogy Batman Begins, The Dark Knight, and The Dark Knight Rises. The philosophical thoughts of the director, Christopher Nolan, is hard to be exhausted. Therefore, the writer (me) will keep working on it. Also, anyone is welcome to come up with suggestions or critiques.

We are living in an age full of superheroes. Since the birth of the movie Superman(1978), those heroes are no longer characters in comics. Instead, they have become cultural icons around the world. People in…


12/20/2020

Note:

  1. All problems are published by HackerRank, credit to HackerRank
  2. The solutions are coded by myself, and open source just for study.

Java Comparator


12/14/2020

Note:

  1. All problems are published by HackerRank, credit to HackerRank
  2. The solutions are coded by myself, and open source just for study.

Valid Username Regular Expression


09/22/2020

Note:

  1. All problems are published by HackerRank, credit to HackerRank
  2. The solutions are coded by myself, and open source just for study.

Java 1D Array (Part 2)


08/02/2020

Note:

  1. All problems are published by HackerRank, credit to HackerRank
  2. The solutions are coded by myself, and open source just for study.

Java Exception Handling (Try-catch)


08/01/2020

Note:

  1. All problems are published by HackerRank, credit to HackerRank
  2. The solutions are coded by myself, and open source just for study.

Java Abstract Class


07/31/2020

Note:

  1. All problems are published by HackerRank, credit to HackerRank
  2. The solutions are coded by myself, and open source just for study.

Java BitSet

Andrew Chen

Undergraduate student / Research assistant/ Always curious / Opinions are mine

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