Slavery in Africa Before Imperialism and After Essay Example for Free

Slavery in Africa Before Imperialism and After Essay Africa can sadly be called the center of the world’s slavery. Slavery’s origins can be traced down to Africa. Of course, before slaves hit the market as a hot trade item, war captives and lawbreakers had been used as slaves in many countries around the world for all time. But the act of the slave market began in Africa. Before the Europeans arrived in Africa, the slave market was much more relaxed. In a way it was just a small community business. There were Arab flash markets, and the Africans themselves, had been trading slaves for centuries before the Europeans arrived around the 1450s. Their strategy was to charge higher prices for the slaves that could not easily escape back to their homelands or be easily rescued by their kin. Along with that tactic, the slave brokers also purposely separated family members and slaves from the same villages. The African slave trade before the Europeans inhibited the expression of regional African cultures and tribal identities. When the Portuguese arrived they saw the potential value of the slave trade and quickly adopted the Arab and African policies and practices of the trade. They also added their own systematic traffic in slaves that were sent to work the sugar plantations that Portugal and eventually Spain established on the West African coast. The Portuguese need and desire for slaves completely topped the previous slave trade. And instead of the local African tribal slave system, slave trading became a huge business. Millions of Africans were taken from their homes and villages to be shipped around the world, but mainly the Americas and Europe. The new work force on the American plantations shaped the future for the Americans. Overall, when the Europeans arrived in Africa the slave trade was quickly turned around and shaped into a super successful and booming business that was one of the Europeans best money making projects.

Microfluidic Systems :: essays research papers

Microfluidic Systems The ready market availability of porous membranes with cylindrical pores of 15-200 nm and a thickness of 6-10 à ¬m facilitates the development of three dimensional analytical unit operation devices on an attaLiter scale. By employing these membranes as gates at the interface of two crossed microfluidic channels, the rate and direction of the fluid exchange can be controlled with electrical potential, polarity, solution ionic strength or diameter of the nanocapillary1. The microfluidic channels, fabricated by soft lithography, have been used for a decade. Dr. Paul W. Bohn, Centennial Professor of Chemical Sciences at the University of Illinois at Urbana-Champaign, sees the advance to multilayered liquid chromatography as a key step in the development of micro total analysis systems (à ¬TAS), which would involve such new applications as injection, collection, mixing, switching and detection. Recently he has been studying the analyte responses to various constraints applied to the sys tem and its deviations in behavior from that of a similar system on the macro scale.   Ã‚  Ã‚  Ã‚  Ã‚  Microfluidic channels are a convenient and durable means of fluid transport made of poly(dimethylsiloxane) (PDMS), a common polymer with non-polar side groups. PDMS is durable, highly flexible and elastic, oxygen permeable and very hydrophobic2. It also has negative surface charge density at pH 81. The method of soft lithography allows for rapid deposition of complex crossed two dimensional fluid pathways on a silicon wafer.   Ã‚  Ã‚  Ã‚  Ã‚  The membrane containing these nanopores is a 6 – 10 micron thick polycarbonate nuclear track-etched membrane (PCTE) that has been coated with poly(vinylpyrrolidone) (PVP) to make it hydrophilic. This coating results in a pH of 8 in the system3. The pores in the membrane are cylindrical and of diameters in the range of 15 – 200 nm. The size of these pores are of the same order of magnitude of the Debye length (à ª-1) of the ionic interactions in solution (1 nm < à ª-1 < 50 nm) when the ionic strength is in the millimmolar range1.   Ã‚  Ã‚  Ã‚  Ã‚  The small physical character of the nanopore allows for a change in ionic strength of the solution to be sufficient to alter the interaction between the solution and the nanopore. By merely changing the concentration, the nature of the flow induced by electrical potential can be switched between electrophoresis and electro osmosis1.   Ã‚  Ã‚  Ã‚  Ã‚  The direction of the flow can be controlled by the size of the nanopore. At large pore sizes, the negative surface charge density on the microfluidic channel caused by the slightly basic pH of the system

Court History and Purpose Essay

Abstract â€Å"The court represents the collective conscience of society, serving as an instrument for expressing the revulsion people feel for those who commit particularly heinous crimes† (Siegal, Schmalleger, & Worrall, 2011). This paper will discuss the history of court and its purpose. It will also define the dual court system. It will describe the role that early legal codes, the common law, and precedent played in the development of courts. It will identify the role of courts in present criminal justice. The Purpose of Court The purpose for court is simply to find guilt or innocence in someone who has been charged of a crime or to settle disputes in civil matters. Such matters must have the legal authority of a judge to be considered a court. In many courts the adversary process is used, allowing both sides to give any evidence, arguments, or persuasion to support their case. A judge or a jury will decide whose case is credible based on the arguments given. In the past, disputes were handled informally and not in a civilized manner. Some people would take matters into their own hands, which led to violence. In today’s society, all matters are handled in a formal and civilized manner. The Dual Court System The judicial branch of the U.S. Government is considered a dual court system because it separates the federal court from the state court. â€Å"The dual system is advantageous and desirable because it parallels federalism, a system of government where power is constitutionally divided between a central governing body (i.e., the federal government) and various constituent units (i.e., the states) (Siegal, Schmalleger, & Worrall, 2011). The establishment of a dual court system began in colonial period. â€Å"The  United States Constitution mandated the establishment of a Federal court system in 1789, when each of the original 13 Colonies already maintained its own comprehensive court system (2013). In federalism, it is required that laws are made by the federal government and the state. Although the dual court system is â€Å"desirable†, it can also cause confusion between the federal and state courts. This is because some cases can be heard at both federal and state levels, and it can be hard to determine how the case should be handled. The Development of Courts The development and influences of the U.S. judicial system came along during the time this country was started. In the beginning, religion played a major part in making the laws of the country. The early legal codes played a significant role in the judicial system as well. These legal codes were used back 1760 B.C. One of the most known legal code is the Code of Hammurabi, who was the king of Babylon. The philosophy behind this code is retribution. Other early legal codes came from ancient Rome. The Twelve Tables were written in 450 B.C. They were said to be the first written legal code. The Twelve Tables was based on strong retribution, establishing the â€Å"eye for an eye† theory for justice. Because the early legal codes were considered to be harsh and informal, it was paved the way for the changes of the judicial system to develop a more formal and civilized system. Common law emerged in England during the Middle Ages and was applied within British colonies across continents (2010). Its role gave judges authority to make decisions as they saw fit. There was no legislature or law making process during this time. Judges would also record the decisions, which led to precedent. â€Å"Precedent refers, generally, to some prior action that guides current action† (Siegal, Schmalleger, & Worrall, 2011). In new cases, judges could apply precedents in their decision, which is how makes it common law. Common law has been implemented into today’s judicial system by following previous courts decisions in cases. It is unlikely that once a judge makes a decision that it will be reversed or changed from precedent. The Present Role of Courts In today’s judicial system, there are two roles involved in courts:  adjudication and oversight. Adjudication means that judges decides if a person is guilty or innocent when they have been involved in a criminal act. Appellate courts make sure that lower courts are applying the correct laws in court proceedings. Having the appellate courts verify all laws ensures that if any mistakes or incorrect information was given by the judges, they will be held accountable. Courts oversee the operations of criminal justice officials to provide a level of indirect supervision. The appellate courts decide laws that will determine how police officers to their job on the street (Siegal, Schmalleger, & Worrall, 2011). Oversight is only necessary when the appellate courts are involved in a decision. If such decisions are publicized, the appellate courts will be involved also. It all depends on the severity of the incident involve by police officers will it be brought to the courts attention . Conclusion The judicial system has indeed changed over the course of time. History has shown that the development of the judicial system was fathered from England and other ancient heritages that set the foundation of how laws are created and implemented into today’s society. More common law is being practiced in many states across the nation. Some of the practices were very informal and retributive, however in today’s court system, court proceedings are in a formal and civilized setting. References Siegal, L.J., Schmallegar, F., & Worrall, J.L (2011). Courts and criminal justice in America. Upper Saddle River, NJ: Pearson. The common law and civil law traditions. (2010). The Robbins Collection. Retrieved From University of California at Berkeley School of Law (Boalt Hall): http://www.law.berkeley.edu/library/robbins/CommonLawCivilLawTraditions.html Understanding the U.S. court system in a glance. (2013). Retrieved from http://court.laws.com/court-system.

Communication Verbal And Non Verbal Communication

Communication is a complex activity which involve verbal and non-verbal communication, the topic under discussion, the prejudgments that people bring to the topic, and the â€Å"communication history† between participants in the discussion. A Speaker who transmits message must ensure that the message is delivered clearly. A listener who takes the messages must be an active listener. As effective communication can only take place when the recipient of the message understands it’s meaning and able to express that meaning back to the speaker or sender of the message. (Flexstudycom.2015). 2.1 Types of Communication People communicate with each other in a number of ways that depend upon the message and its context in which it is being sent. There are basically 2 categories of communication channel: †¢ Verbal Communication †¢ Non-verbal Communication 2.1.1 Verbal communication refer to the form of communication in which message is transmitted verbally. The main idea of verbal communication is to keep everything â€Å"KISS† (keep it short and simple). And it can further divide into Oral Communication and Written Communication. 2.1.2 Non-verbal communication is the sending or receiving of wordless messages. With the body people communicate a wide variety of message through gestures, facial expressions, eye movements and touching behavior. Sometimes non-verbal communication response contradicts verbal communication and hence the affect the effectiveness of message.These non-verbal meansShow MoreRelatedCommunication And Verbal And Non Verbal Communication Essay1500 Words   |  6 PagesCommunication, as described in ‘businessdictinary.com,’ is a two-way process in reaching mutual understanding, in which participants not only exchange information, news, ideas and feelings but also create and share meaning. It is a means of connection between people or places. Without communication there would be no understanding between people and important information and messages would not be correctly conveyed. This is why communication plays an important role in our daily lives and when notRead MoreVerbal and Non-Verbal Communication851 Words   |  4 PagesCommunication in the Military â€Æ' In this paper, I will be writing on the topic of the United States military. I will discuss why this group is effective and how verbal and nonverbal communication is used depending on the task at hand. I will also share the different roles each person in the group must complete for the mission to be a success. Lastly, I will show how the morale is boosted and the members take pride in job when those roles that need completed are done correctlyRead MoreNon Verbal And Verbal Communication978 Words   |  4 Pagestaking this class I almost feel as if I was blind to the various aspects of communication compared to now. 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There are many forms of communication and it is constantly evolving. One such field that communication is important in is physical therapy. There is constant interaction between patients, physical ther apists, physical therapists assistants, other employees, other health professionals, etc. This report will look at communication within different levels of employment, non-verbal and verbal communication, communication impacted by the audience, technologyRead MoreVerbal and Non-Verbal Communication2628 Words   |  11 Pages Communication has always been a vital part of our life and is important in the day to day interactions we participate in with friends, family and the people who are close to us. According to Encyclopedia Britannica, â€Å"communication is the exchange of meanings between individuals through a common system of symbols.† Communication varies between two types, one being verbal communication and the other being non-verbal communication. Amy Lucas highlights in her article the fact that, Our ancestors huntedRead MoreVerbal And Non Verbal Communication1753 Words   |  8 PagesThe difference between verbal and non-verbal communication Verbal communication is communicating with another person using speech or written words. We communicate verbally using tone, pitch and the speed of our spoken words. These usually indicate different emotions. For example a high pitch and fast paste speech can indicate excitement. Verbal communication is used in a health and social care environment to make sure that we understand clearly what the client or patient wants or might need. These