This video is composed of a sequence of time lapse films created by John Tyler Bonner in the 1940s to show the life cycle of the cellular slime mold, Dictyostelium discoideum. As only the second person to study slime molds, Bonner frequently encountered audiences who had never heard of, let alone seen, the unusual organism. He therefore decided to create a film to present at seminars in order to introduce his object of study. Bonner created the video for his senior thesis at Harvard University with the help of photographer Frank Smith. Bonner began to work at Princeton University in 1947, thus the mention of that university on the title screen of the film. It was digitized and narrated by developmental biologist Rachel Fink of Mount Holyoke College. Includes (approximate starting times given): Amoebae [00:02]; Aggregation [00:27]; Migrating Pseudoplasmodia [02:16]; Culmination [03:28]; Trisected Pseudoplasmodium [04:17].

By the 1930s, the MBL had become "the" place to go during the summer for biological research and training. Luminaries such as Frank Lillie, Edmund Beecher Wilson, Edwin Grant Conklin, and Thomas Hunt Morgan took their students, packed up their families and research labs, and headed to the MBL. They worked in labs, ate together in the Mess, and they often lived in the limited on-campus housing. Life at the MBL was a life where fun, family, and science intertwined. This film, taken in 1935 by B. R. Coonfield of Brooklyn College, captures snippets of life at the MBL. Though the science and equipment are considerably updated and the faces and families have changed, many features remain the same today.

Topsy is an online analytical tool that evaluates millions of archived and real-time tweets based on their relevancy to a specific criterion. This report studies what Topsy considers relevant, how to create a relevant tweet, the accuracy of Topsy’s relevancy score and whether Topsy is an acceptable tool for use in gauging class participation. After thorough investigation, Topsy was determined to be a great analytical tool for monitoring Twitter participation, yet lacks the fundamental ability to distinguish between tweets relevant to coursework and tweets relevant to everything else.

Access to reliable electricity is at least a co-requisite to sufficient human development. In many developing countries, the percentages of the rural population that have electricity access are often below 5%. Specifically in Uganda, only about 2% of the rural population is currently served by the electric grid. To create effective policy and implementation programs, this paper examines the current challenges and implications of the current energy sector of Uganda. Ostrom’s Social-Ecological Systems framework is employed to organize the driving forces, interactions, and key players of the current system, including recent rural electrification programs that have resulted in some success. However, the implications of the current system include multiple barriers to widespread rural electrification, including high costs and little revenue. The push for solar photovoltaic systems in Uganda also has many shortcomings to improving development within the country. I end by discussing an alternative approach to rural electrification called the Empower Ugandans to Power Uganda Project that offers a locally driven effort to electrification and development.

Historically, advances in technology have made it possible for modern consumers to perform daily tasks more rapidly and efficiently. In the present technological age, innovation extends to energy conservation. As a typical consumer may be well aware, such innovation often means higher prices. However, in the case of appliances which run on minimal energy, advertisements claim that higher purchase prices will be justified by long-term monetary savings resulting from lower energy bills. This report investigates the veracity of this claim. Generally, the findings in this report are that it depends.

The ENERGY STAR program pioneered by the United State Environmental Protection Agency is a voluntary green-labeling program that helps consumers identify energy-saving appliances. Nevertheless, ENERGY STAR does not indicate to consumers whether a higher purchase price for the efficient appliance will be justified by subsequent energy savings.

There are several variables which may justify spending more for energy conserving appliances. It seems uncommon practice for a consumer to thoroughly evaluate factors which affect their purchase, making it possible to spend more money despite the mindset of saving money. The goal of this report is to identify and evaluate the variables, or varying scenarios, that potentially sway the smart purchase decision in the case of ENERGY STAR refrigerators. Thus, the decision can be tailored to a specific type of individual or household.
The ideal refrigerator for any given consumer depends on the habits and preferences of that consumer including: time value of money preferences, food storage habits, and energy prices. A cash flow diagram is a tool used to depict the monetary gains and losses involved in an investment and will be a practical means to showcase both the initial costs and long-term maintenance costs for either type of refrigerator as influenced by each of the three criteria introduced.

This report uses cash flow diagrams to investigative the sensitivity of a refrigerator purchase option to these three parameters. Graphs are also included which will take the costs shown in the cash flow diagrams and display how many years it will take for the higher initial purchase price of the ENERGY STAR refrigerator to be justified by its lower maintenance costs, called the break-even point. The analysis also involves calculating the net present value, a term used largely in business, for both an ENERGY STAR appliance and a conventional appliance; and involves calculating this net present value, also, as influenced by the different circumstances mentioned.

Each year, the United Nation’s Development Program (UNDP) publishes the Human Development Index (HDI), which is a composite index that offers a method of evaluating international human development not only by economic advances but also in terms of the capabilities of individuals within a country. This study investigates the origin of the diminishing returns to HDI, given its important implications for climate policy and development. Specifically, we examine the current HDI calculation procedure to determine if the observed relationship is a factor of dimension normalization and/or aggregation within the HDI calculation.