Thirty years of homicides in Medellín, Colombia, 1979-2008

RESUMEN: El homicidio en Medellín, Colombia, se convirtió en la primera causa de muerte desde 1986 y su participación del total de muertes pasó de 3,5% en 1976 a 42% en 1991 y 7% en 2006. Entre 1979 y 2008 hubo 81.166 homicidios (2.706 promedio/año). La tasa de homicidios por 100.000 habitantes fue 44 en 1979 y 47 en 2008, con un máximo de 388 en 1991. Se describen características de los homicidios en 30 años, entre 1979 y 2008, por quinquenios, mediante una muestra aleatoria de 3.414 necropsias médico-legales. Los muertos fueron hombres 92.8% (IC95%: 91,8; 93,6), jóvenes con promedios de edad entre 27 y 33 años, residentes en estratos socioeconómicos bajos, con predominó de los móviles ajustes de cuentas, riñas y atracos. Se evidenciaron tres periodos diferentes de la epidemia de homicidios: el primero de incremento acelerado 15 años, el segundo de descenso sostenido hasta 1998 y el tercero ondulante y descenso abrupto en los 10 últimos años. Estos resultados de larga duración de la violencia en la ciudad abren posibilidades analíticas para encontrar políticas más consistentes de intervención.ABSTRACT: In Medellín, Colombia, homicides have been the leading cause of death since 1986. Their proportion among total deaths increased from 3.5% in 1976 to 42% in 1991 and subsequently decreased to 7% in 2006. From 1979 to 2008, there were 81,166 homicides (annual mean, 2,706). The homicide rates per 100,000 inhabitants were 44 in 1979 and 47 in 2008, with a peak of 388 in 1991. The current article analyzes homicides in 30 years (1979-2008) using a random sample of 3,414 forensic autopsy reports. The vast majority of victims were males, 92.8% (95%CI: 91.8%; 93.6%), mostly low-income young people from 27 to 33 years of age. Most homicides involved revenge, fights, or armed robberies. The study showed different periods in the homicide epidemic: the first 15 years, with a rapid increase, the second, with a steady decline until 1998, and the third, with a fluctuating but overall steep decline in the last 10 years. This long-term study on violence in Medellin opens possibilities for analyzing and identifying more consistent policies for intervention

Diagnóstico y erradicación de la violencia - grupo violencia

IP 0101-10-001-87cotidiano, lo social y lo politico / Olga Amparo Sanchez,MarthaLucia Uribe -- La familia y la socializacion;de la violencia / Maria Himelda Ramirez -- Violencia y mediosdecomunicacion / Ramon Jimeno, Ana Maria Cano; Violencia y medios de comunicacion / Arturo Guerrero --Violencia y medios de comunicacion Guillermo Callej;M.;carcelaria en Colombia / Annette Pearson, Jesus Antonio Muñoz--Violenciaintrafamiliar : una mirada desde lo;Cauca : la violencia en el cauca vision sintetica -- Economiade la violencia / Salomon Kalmanovitz -- La;violencia y el problema agrario / Alejandro Reyes Posada -'- Reforma politica y proceso de paz / Alvaro;Echeverry Uruburu -- La violencia y los pueblos indigenasde hoy/ VictorManuel Bonilla S. -- Administracion;de justicia y nuevo codigo penal / Humberto Rendon Arango'-- Politica internacional y pacificacion nacional /;Juan Tokatlian, Rodrigo Pardo -- La crisis de la justiciay lasacciones requeridas para su transformacion /;Jorge Acevedo B. -- El aumento de la violencia delincuencial estambien una expresion de la crisis del derecho;penal / Pastor Alberto Acevedo -- Investigacion criminologica:homicidiosen Cali 1980 - 1985 / Jaime Patiño;'-- organizaciones populares- civiles e institucionalizacion /Carlos Vicente de Roux -- La violencia;[et al.] -- Manifestaciones de violencia en la zona esmeraldifera y el occidente de Boyaca / Javier Guerrero;Baron -- Bases para un posible estatuto del indigena / AdolfoTriana Antorveza -- Violencia y Colonizacion /;Alfredo Molano -- El programa de inversiones del PNR y elPPAyla inversion publica en la actual coyuntura /;Alberto Corchuelo -- Inspecciones de policia / Luisa MargaritaH. de Yepes'-- Consejo Regional indigena del;LIBROS: Colombia : violencia y democracia informe presentado aMinisteriode Gobierno / Jaime Arocha R. ..

Coronal Heating as Determined by the Solar Flare Frequency Distribution Obtained by Aggregating Case Studies

Flare frequency distributions represent a key approach to addressing one of the largest problems in solar and stellar physics: determining the mechanism that counter-intuitively heats coronae to temperatures that are orders of magnitude hotter than the corresponding photospheres. It is widely accepted that the magnetic field is responsible for the heating, but there are two competing mechanisms that could explain it: nanoflares or Alfv\'en waves. To date, neither can be directly observed. Nanoflares are, by definition, extremely small, but their aggregate energy release could represent a substantial heating mechanism, presuming they are sufficiently abundant. One way to test this presumption is via the flare frequency distribution, which describes how often flares of various energies occur. If the slope of the power law fitting the flare frequency distribution is above a critical threshold, $\alpha=2$ as established in prior literature, then there should be a sufficient abundance of nanoflares to explain coronal heating. We performed $>$600 case studies of solar flares, made possible by an unprecedented number of data analysts via three semesters of an undergraduate physics laboratory course. This allowed us to include two crucial, but nontrivial, analysis methods: pre-flare baseline subtraction and computation of the flare energy, which requires determining flare start and stop times. We aggregated the results of these analyses into a statistical study to determine that $\alpha = 1.63 \pm 0.03$. This is below the critical threshold, suggesting that Alfv\'en waves are an important driver of coronal heating.Comment: 1,002 authors, 14 pages, 4 figures, 3 tables, published by The Astrophysical Journal on 2023-05-09, volume 948, page 7