Less intra-row weeds – experiences with a punch planter and a cycloid hoe based on GPS

Experiences with a punch planter and an intelligent rotary tine weeder are summarized. The objectives were to investigate (1) to what extent punch planting and pre-emergence flame weeding can reduce intra-row weed emergence in direct sown crops like onion, carrot and sugar beet, (2) to what extent an intelligent intra-row weeder, a cycloid hoe based on RTK-GPS technology, can control intra-row weeds without damaging the crop in direct sown crops, (3) and to what extent there exists synergy between punch planting with pre-emergence flame weeding and mechanical intra-row weeding

Inter-row subsoiling increases marketable yield in potatoes

Inter-row subsoiling increased average yield of 40-65 mm potatoes by 14 pct during 2001-2003. But there were significant differences between the years. In 2001, the yield increased by 49 pct, whereas it was unaffected or decreased in 2002 and 2003. Better understanding of optimal subsoiling conditions is needed to exploit the benefit of inter-row subsoiling

Automated characterization of single-photon avalanche photodiode

We report an automated characterization of a single-photon detector based on commercial silicon avalanche photodiode (PerkinElmer C30902SH). The photodiode is characterized by I-V curves at different illumination levels (darkness, 10 pW and 10 uW), dark count rate and photon detection efficiency at different bias voltages. The automated characterization routine is implemented in C++ running on a Linux computer.Comment: Have permission to post journal-formatted version on arXi

The Native Greenlander - A Blending of Old and New

Contains an introduction by Trevor Lloyd, on the changes now taking place among Eskimos of Greenland, and on the author's part in education there. Then follows Dean Bugge's presentation of Eskimos' psychology; the "closed" and "open" types among them; their emotional life, fatalism, conservatism, especially in their language, love of nature and children and gaiety; to understand and preserve these positive traits, whilst planning reforms, is the author's plea. This paper is translated from one originally prepared for the Greenland Society (and pub. in its Aarsskrift 1950, p. 136-44) and modified slightly for a wider public

Creating Exhibits for Small History Museums on a Limited Budget

In this capstone project, I study the process of developing an exhibition for small history museums. Working with the Treasure Island Museum, a small history museum in San Francisco, I explore the different options for developing exhibitions for small history museums, with small budgets, in contrast to the more well funded practice that larger museums have the opportunity to produce. For museums, exhibits are the media used to communicate with visitors, and it is important to install new ones regularly. Being limited by budget and staff constraints this can be a challenge, but I argue that the benefits from the exhibits are greater than the disadvantages from devoting resources to the project. The paper examines best practices for exhibition development and project management and offers a solution to bringing costs down so that smaller, financially challenged museums can create well-constructed exhibitions on a regular basis