Analysis of cannabis in oral fluid specimens by GC-MS with automatic SPE

Methamphetamine (MA) is the most commonly abused drug in Korea, followed by cannabis. Traditionally, MA analysis is carried out on both urine and hair samples and cannabis analysis in urine samples only. Despite the fact that oral fluid has become increasingly popular as an alternative specimen in the field of driving under the influence of drugs (DUID) and work place drug testing, its application has not been expanded to drug analysis in Korea. Oral fluid is easy to collect and handle and can provide an indication of recent drug abuse.In this study, we present an analytical method using GC–MS to determine tetrahydrocannabinol (THC) and its main metabolite 11-nor-Δ⁹-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) in oral fluid. The validated method was applied to oral fluid samples collected from drug abuse suspects and the results were compared with those in urine. The stability of THC and THC-COOH in oral fluid stored in different containers was also investigated.Oral fluid specimens from 12 drug abuse suspects, submitted by the police, were collected by direct expectoration. The samples were screened with microplate ELISA. For confirmation they were extracted using automated SPE with mixed-mode cation exchange cartridge, derivatized and analyzed by GC-MS using selective ion monitoring (SIM).The concentrations of THC and THC-COOH in oral fluid showed a large variation and the results from oral fluid and urine samples from cannabis abusers did not show any correlation. Thus, detailed information about time interval between drug use and sample collection is needed to interpret the oral fluid results properly. In addition, further investigation about the detection time window of THC and THC-COOH in oral fluid is required to substitute oral fluid for urine in drug testing.     

Application of 3D Laser Scanner to Forensic Engineering

In the case of building collapses and overturned structures, a three‐dimensional (3D) collapse or overturn model is required to reconstruct the accident. As construction sites become increasingly complex and large, 3D laser scanning is sometimes the best tool to accurately document and store the site conditions. This case report presents one case of a structure collapse and one case of an overturned crane reconstructed by a 3D laser scanner. In the case of structural collapse of a prefabricated shoring system, a 3D model reconstructed all the members successfully, a task that is nearly impossible using a scale such as a tape measure. The reconstructed prefabricated shoring system was verified through a structural analysis through comparison with the construction drawings to investigate faults in construction. In the case of the overturned crane, the jib angle and other major dimensions were successfully acquired through 3D laser scanning and used to estimate the working radius. As a result, the propriety of the working radius with the given lifting load was successfully determined.     

Political corruption,economy, and citizens' evaluation of democracy in South Korea

South Korean politics has been haunted by numerous corruption scandals as well as the prosecution of politicians and their cronies for their corruption. Yet despite the prevalence and salience of political corruption, many citizens of South Korea tend to overlook the problem by continuing to support corrupt politicians and administrations. This study defines under what circumstances political corruption shapes citizens' judgment of government and the political system as a whole in South Korea. The results indicate that national economic conditions as a perceptual screen mediate the effect of political corruption on the evaluation of democratic governance.     

The Contraceptive Self-Efficacy Scale: Analysis in Four Samples

Previous research has established a relationship between Contraceptive Self-Efficacy (CSE), as measured by the 18-item CSE scale, and young women's contraceptive behavior (Bilodeau, Forget, and Tetreault, 1994; Heinrich, 1993; Levinson, 1986; Wright, 1992). In this paper, we continue to explore the scale and its relationship to contraceptive behavior with four diverse samples to establish generalizability and to set guidelines for use of the scale. A series of correlational analyses were conducted with each sample. A pattern of low correlations among CSE items across samples emerged, indicating that use of the total item set separately as the basis for CSE was warranted. Zero-order and partial correlations revealed which CSE items were correlated with contraceptive behavior as well as which items explained unique variance in contraceptive behavior for each sample. Regression analyses showed that CSE was significantly predictive of contraceptive behavior for all samples. These results are discussed in terms of scale properties and use in research and clinical settings. Educational implications are formulated as well.     

Fighting the Korean War in pacifist Japan: Korean and Japanese leftist solidarity and American Cold War containment

Where does “pacifist” Japan fit within the history of the Korean War? Was Japan simply the beneficiary of the wartime boom – a case best exemplified by Japanese Prime Minister Yoshida Shigeru’s characterization of the Korean War as “a gift of the gods”? When North Korean troops crossed the thirty-eighth parallel and launched a full-scale attack against South Korea, the U.S. occupation in Japan quickly transformed the pacifist nation into the indispensable rear base of United Nations military intervention in the Korean War. The Japanese Communist Party and leftist groups organized by zainichi Koreans (Korean residents in Japan) launched an antiwar movement to stop Japan from producing and sending arms to UN forces in Korea. The U.S. occupation responded with determined efforts to contain every antiwar voice emerging from the streets of the pacifist country. By examining the political dynamics of zainichi Korean and Japanese leftist solidarity and U.S. countermeasures, this article shows how the Korean War was fought in pacifist Japan. It also illuminates how the practice of Cold War containment was mutually linked on the ground between occupied Japan and South Korea.     

The Sisyphus’s Rock of Prosperity and Disparity in the Global Economy: Giovanni Arrighi and Apple Inc’s Tax Avoidance Strategies from Obama to Trump

The global value chain (GVC) perspective assumes that business firms’ occupation of high value-added nodes in the global production network can promote their countries’ socio-economic development. However, I argue that society-wide benefits that may follow from firms’ profit-maximizing activities are often ephemeral. Over time the middle class can shrink, and economic inequality can increase even when firms continue to move up to higher value-added niches and garner huge profit. I illustrate this disjunction between business activities and societal development with Apple’s strategies of tax avoidance and reduction from the Obama to the Trump administration. I then draw on the theoretical framework that Giovanni Arrighi sets out in The Long Twentieth Century and ideas from The Myth of Sisyphus by Albert Camus to analyze the Apple case. As my analysis makes clear, the flawed assumption of the GVC perspective reveals its practitioners’ failure to recognize that within global capitalism, permanent and sustained societal affluence is unlikely, and what exists instead is a constant alternation between prosperity and disparity.     

Marketing barriers facing developing country manufactured exporters: A comment

In a recent interesting article, Lall [1991] has noted that conventional export theories tend to neglect the role of marketing barriers to new entrants. In this comment I try to further develop two main ideas. The first is that firms from developing countries may not have the incentive to maintain quality standards. The second is that consumers in developed countries may have a country of origin bias towards new products from developing countries.     

Elections with partially ordered preferences

Suppose an organization has a committee with multiple seats, and the committee members are to be elected by a group of voters. For the organization, the possible alternatives are the possible sets of individuals who could serve together. A common approach is to choose from among these alternatives by having each voter cast separate votes on the candidates for each seat. When this type of ballot is used, important characteristics of the set of individuals on the committee (such as what percentage of the members will be female) might not be explicitly considered by the voters. Another approach that has been used is to have each voter cast a ballot which ranks all possible sets of members. However, this approach can require the voters to weigh a relatively large number of alternatives. This paper considers group decisions where it is desirable to: (1) explicitly consider characteristics of alternatives and (2) have a relatively small number of options upon which a voter has to express his preferences. The approach that we propose has two steps: First voters vote directly on pertinent characteristics of alternatives; Then these votes are used to indirectly specify preferences on alternatives. The indirectly specified preferences are ones that are naturally modeled using partially ordered sets. We identify some specific methods that could be applied in the second step. In addition, by replacing the indirectly specified preferences in a suitable way, we suggest a technique that can use any positional, pairwise, or other voting method that accepts totally (or “completely”) ordered inputs to tally ballots. We also describe another way to potentially compute pairwise rankings from partially ordered alternatives and discuss some practical and theoretical difficulties associated with our approach.