Über die Wasserbewegungen im Holz

Von Julius Sachs

Über die Wirkung der ultravioletten Strahlen auf die Blüthenbildung

Von Julius Sachs

Erfahrungen über die Behandlung chlorotischer Gartenpflanzen

Von Julius Sachs

Sefer more nevukhim

le-ha-Rav rabenu Mosheh ben Maimon ha-Sefaradi [[Elektronische Ressource]] : Bd. 1/3

Sabbatpredigten zu den Wochenabschnitten des ersten Buches Moses

Aus der Sammlung des Leo Baeck Institute, digitalisiert in Kooperation mit dem Center for Jewish History, NY

Sabbatpredigten zu den Wochenabschnitten des dritten Buches Moses

Aus der Sammlung des Leo Baeck Institute, digitalisiert in Kooperation mit dem Center for Jewish History, NY

Sabbatpredigten zu den Wochenabschnitten des vierten Buches Moses

Aus der Sammlung des Leo Baeck Institute, digitalisiert in Kooperation mit dem Center for Jewish History, NY

Ansichten von Palästina und den Jüdischen Colonien

photographiert und beschrieben von I. Raffalovich & M. E. Sachs

Predigten

von Dr. Michael Sachs ; aus dessen schriftlichen Nachlaß herausgegeben von Dr. David Rosin

Die Partikeln der Mischna

Giessen, Univ., Diss., 1897

Festpredigten

Aus der Sammlung des Leo Baeck Institute, digitalisiert in Kooperation mit dem Center for Jewish History, NY

Prevalence and trends of substance abuse in Harris County, Texas, 1989 to 1991

In the late 1980s, Harris County, Texas began experiencing an escalation of drug-related activities. Various indicators used in this analysis tracked drug-related trends from 1989 to 1991 to determine patterns for comparison of local (Houston/Harris County, Texas) to national levels.^ An important indicator of the drug scenario was drug-related activities among youths, which increased during the period of this study. The Harris County Juvenile Probation Department showed that among arrests for drug-related activities, felonies increased from 25% in 1988 to 53% in 1991. With the rise in drug-related crimes, and substance abuse among the student body, school districts were forced to institute drug education programs in an effort to curtail such activities.^ Law enforcement agencies in the county saw increased demands for their services as a result of drug activities. Harris County Sheriffs Department reported a 32% plus increase in drug-related charges between 1986 and 1991. Houston Police Department reported an increase of 109% for the same period.^ Data from the Harris County Medical Examiner, the National Institute of Justice's Drug Use Forecasting System (Houston), and drug treatment facilities around Houston/Harris County, Texas indicated similar drug usage trends. Over a four-year period (1988-91), the drugs most frequently detected during blood and urine analyses were cocaine, followed by marijuana, heroin, LSD, and methamphetamines.^ From 1988 to 1991, most drug rehabilitation organizations experienced increased demands for their services by approximately 35%. Several other organizations experienced as much as a 70 percent increase. Males accounted for roughly 70% and females about 30% of persons seeking treatment. However, the number of females pursuing treatment increased, thereby reducing the gender gap.^ Blacks in Houston/Harris County were at higher risk for drug usage among the general population, but sought treatment more readily than other ethnic groups. Whites sought treatment in similar numbers as Blacks, but overall the risk appeared smaller because they made up a larger portion of the Houston/Harris County population.^ This analysis concluded that drug trends for the Houston/Harris County, Texas did not follow national trends, but showed patterns of its own. It was recommended that other communities carry out similar studies to determine drug use trends particular to their local. ^

Energía solar

La energía solar posee un enorme potencial, por ejemplo, si un 10% del desierto de Sahara fuera instalado con paneles solares (suponiendo una efectividad de captación de radiación del 10%), produciría una cantidad de energía eléctrica equivalente al doble del consumo eléctrico mundial. De este modo no existe un problema de recursos o fuentes de energía, sino un problema de costos (actualmente, la energía solar es 10 veces más cara de producir que la provista por una central térmica tradicional) y las demás formas limpias de generar electricidad (hidroeléctrica, geotérmica, mareomotriz, eólica, etc.) no poseen la capacidad técnica de alimentar al planeta dado los recursos limitados de las mismas (Lackner y Sachs 2005). En Argentina el uso de este tipo de tecnología es todavía muy limitado. No obstante ha aumentado recientemente la popularidad del uso de la energía solar (y calefones solares) en la región de Cuyo haciendo verdaderamente importante un estudio sobre si esta tendencia es correcta y conviene a la sociedad o si sus recursos serían mejor invertidos en otras tecnologías o gastos (incluso dentro del ámbito energético). Un aspecto que resulta importante evaluar es la conveniencia de la implementación de estas tecnologías desde el punto de vista económico-privado ya que de esta manera se pueden direccionar acciones de políticas tendientes a incentivar el uso de las mismas.