AN INEXPENSIVE LIGHTWEIGHT PISTON CORER

An innovative piston corer for large‐volume sediment samples

Coring is one of several standard procedures to extract sediments and their faunas from open marine, estuarine, and limnic environments. Achieving sufficiently deep penetration, obtaining large sediment volumes in single deployments, and avoiding sediment loss upon retrieval remain problematic. We developed a piston corer with a diameter of 16 cm that enables penetration down to 1.5 m in a broa...

Construction and use of an inexpensive, lightweight free-fall penetrometer: applications to paleolimnological research

This paper describes the construction of an inexpensive, lightweight, free-fall lake sediment penetrometer with application to paleolimnological research. This penetrometer is suitable for use in a variety of fresh water lake settings. Data are collected on a laptop PC, Palm OS handheld, or a Texas Instruments handheld data collection unit and are analysed using commercially available software....

An inexpensive blackbody model

A blackbody is a fundamental concept in thermography. A perfect model of blackbody is characterized by emissivity =1 which is difficult to be obtained. There are black body simulators which are being used for calibration of infrared devices. Commercial solutions of blackbody simulators are based on mathematical models of cavity or surface blackbodies and their emissivity is closer to unity e.g....

Self-assessment corer Intestinal obstruction in an adolescent female

Accepted 28 June 1995 A 16-year-old girl was admitted with a history of abdominal pain, recurrent vomiting and abdominal distension for the last three years. On examination there was a diffuse lump occupying the central abdomen. Sigmoidoscopy showed normal mucosa till 20 cm. Apart from a polymorphonuclear leucocytosis (total white cell count of 25 x 109/1 with 80% polymorphs), other laboratory ...

An inexpensive, accurate ''injection gun''.