Since the onset of the crack epidemic in the U.S. in the 1980s, the social and health consequences to the drug's users from their perspective has received limited attention. This exploratory study was designed to explore heterogeneity among crack users. Based on in-depth interviews with 22 active crack users in Atlanta, Georgia, variations among them were explored. Data analysis involved the constant comparison method as part of the grounded theory approach. A typology was derived that describes four subsets of users. The two most salient dimensions of the typology are the level of protective strategies that enable the user to avoid negative consequences and their frequency of crack use. Daily life structure and the extent to which they have access to crack contributed most strongly to use frequency. The typology includes: (1) stable users; (2) tempted users; (3) grappling users; and (4) immersed users. Increased insight into the heterogeneity among crack users is relevant when designing comprehensive prevention and intervention programs.
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http://dx.doi.org/10.1080/02791072.2002.10399979 | DOI Listing |
ACS Appl Mater Interfaces
January 2025
Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350116, China.
Anticounterfeiting technologies meet challenges in the Internet of Things era due to the rapidly growing volume of objects, their frequent connection with humans, and the accelerated advance of counterfeiting/cracking techniques. Here, we, inspired by biological fingerprints, present a simple anticounterfeiting system based on perovskite quantum dot (PQD) fingerprint physical unclonable function (FPUF) by cooperatively utilizing the spontaneous-phase separation of polymers and selective in situ synthesis PQDs as an entropy source. The FPUFs offer red, green, and blue full-color fingerprint identifiers and random three-dimensional (3D) morphology, which extends binary to multivalued encoding by tuning the perovskite and polymer components, enabling a high encoding capacity (about 10, far surpassing that of biometric fingerprints).
View Article and Find Full Text PDFInt J Soc Psychiatry
December 2024
Center for Drug and Alcohol Research, Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
Background: Substance Use Disorders are often associated with significant levels of domestic and external violence registered among abusers. This investigation aimed to evaluate the Domestic Violence Involvement (DVI) and related gender differences among Crack Cocaine Users in Brazil.
Methods: For this purpose, a secondary data analysis of a multicenter cross-sectional study involving 780 Crack Cocaine Users from 6 Brazilian capitals was performed.
ACS Appl Mater Interfaces
January 2025
National Engineering Lab of Special Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Optoelectronic Technology, Hefei University of Technology, Hefei 230009, China.
Flexible sensors mimic the sensing ability of human skin, and have unique flexibility and adaptability, allowing users to interact with intelligent systems in a more natural and intimate way. To overcome the issues of low sensitivity and limited operating range of flexible strain sensors, this study presents a highly innovative preparation method to develop a conductive elastomeric sensor with a cracked thin film by combining polydimethylsiloxane (PDMS) with multiwalled carbon nanotubes (MCNT). This novel design significantly increases both the sensitivity and operating range of the sensor (strain range 0-50%; the maximum tensile sensitivity of this sensor reaches 4.
View Article and Find Full Text PDFBMC Public Health
December 2024
Health, Behavior, and Society, Johns Hopkins Bloomberg School of Public Health, 624 N. Broadway St, Baltimore, MD, 21205, USA.
Background: The COVID-19 pandemic highlighted the salience of material needs and financial precarity on mental health and distress. Women who use drugs (WWUD) experienced significant mental distress and multiple material need insecurities before the pandemic. However, research is limited on the nature of these insecurities during the pandemic despite both material scarcity and mental distress placing WWUD at greater risk of drug-related harms such as overdose.
View Article and Find Full Text PDFProsthet Orthot Int
December 2024
Health Rehabilitation Group (GRES), Department of Physical Medicine and Rehabilitation, School of Medicine, University of Antioquia, Medellín, Colombia.
Background: A significant number of Colombian farmers who are transtibial amputees are civilian victims of landmines. Current prostheses are inadequately adapted for agricultural work, resulting in functional challenges in this context.
Objectives: This study aims to analyze and categorize the functional problems of transtibial prostheses in the Colombian agricultural context, incorporating perspectives from prosthesis users, manufacturers, and designers.
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