Disambiguation strategies for cross-language information retrieval

This paper gives an overview of tools and methods for Cross-Language Information Retrieval (CLIR) that are developed within the Twenty-One project. The tools and methods are evaluated with the TREC CLIR task document collection using Dutch queries on the English document base. The main issue addressed here is an evaluation of two approaches to disambiguation. The underlying question is whether a lot of effort should be put in finding the correct translation for each query term before searching, or whether searching with more than one possible translation leads to better results? The experimental study suggests that the quality of search methods is more important than the quality of disambiguation methods. Good retrieval methods are able to disambiguate translated queries implicitly during searching

Black Labor at Pine Grove & Caledonia Furnaces, 1789-1860

Black labor operating under various degrees of freedom found a suitable working environment, if not a safe haven, in several iron forges of South Central Pennsylvania, from the late 1790s through the 1850s. Primary accounts indicate that two in particular, Pine Grove Furnace of Cumberland County, and Caledonia Furnace of Franklin County, harbored runaway slaves to augment their work force. Pine Grove records, dating from 1789 – 1801, specify names of “negro” employees, verifying that black labor coexisted with white, but day books, journals, and ledgers do not denote status.1 Whether they were free men, or slaves rented out by Pennsylvania slave owners, or runaways from the South cannot be gleaned from the day books. All three combinations were possible, especially in the 1790s. Circumstantial evidence suggests that escaped slaves did bolster the ranks of both forges until 1860. With renowned abolitionist Thaddeus Stevens in ownership of Caledonia, and proprietors sympathetic to the same cause at Pine Grove, the environment favored Underground Railroad activity. When this circumstance is coupled with the presence of a Quaker Meeting House in northern Adams County, and the recognition that both forges were within a thirty mile radius of the Maryland slave-state border, then a recipe existed for hide-outs to be employed in area furnaces. [excerpt

The Dual Feminisation of HIV/AIDS

This is an Accepted Manuscript of an article published by Taylor & Francis in Globalizations on 2011, available online: http://wwww.tandfonline.com/10.1080/14747731.2010.49302

Mixing and merging for spoken document retrieval

This paper describes a number of experiments that explo- red the issues surrounding the retrieval of spoken documents. Two such issues were examined. First, attempting to find the best use of speech recogniser output to produce the highest retrieval effectiveness. Second, investigating the potential problems of retrieving from a so-called "mi- xed collection", i.e. one that contains documents from both a speech recognition system (producing many errors) and from hand transcription (producing presumably near perfect documents). The result of the first part of the work found that merging the transcripts of multiple recognisers showed most promise. The investigation in the second part showed how the term weighting scheme used in a retrieval system was important in determining whether the system was affected detrimentally when retrieving from a mixed collection

International development in transition

This is the pre-peer reviewed version of the following article: HARMAN, S. and WILLIAMS, D. (2014), International development in transition. International Affairs, 90: 925–941. doi: 10.1111/1468-2346.12148, which has been published in final form at http://dx.doi.org/10.1111/1468-2346.12148International development is in a period of transition. While the outcome of this is still unclear, this article argues that there are at least four areas in which the project of international development is changing. First, there is a debate, especially within the World Bank, about development strategy and how we think about development, particularly in terms of the balance between states and markets. This is evident in the debate over state failure and the new structural economics. Second, there is increasing evidence of a shift in lending, away from projects of 'small' human development, perhaps best encapsulated by the United Nations Millennium Development Goals, towards more transformative 'big' development projects such as infrastructure. Third, 'non-traditional' aid donors and new forms of private philanthropy are playing a more significant role in development financing and this, in turn, offers developing countries a new range of choices about what kinds of development assistance they receive. Fourth, aid relations are changing as a result of the renewed agency of developing states, particularly in sub-Saharan Africa, and shifts towards increased South-South cooperation are growing as evidenced by increased funding from regional development banks and increased trade flows. The article reviews these changes and suggests a series of questions and challenges that arise from them for analysts of international development, developing countries and traditional aid donors. © 2014 The Royal Institute of International Affairs

Amorphous procedure extraction

The procedure extraction problem is concerned with the meaning preserving formation of a procedure from a (not necessarily contiguous) selected set of statements. Previous approaches to the problem have used dependence analysis to identify the non-selected statements which must be 'promoted' (also selected) in order to preserve semantics. All previous approaches to the problem have been syntax preserving. This work shows that by allowing transformation of the program's syntax it is possible to extract both procedures and functions in an amorphous manner. That is, although the amorphous extraction process is meaning preserving it is not necessarily syntax preserving. The amorphous approach is advantageous in a variety of situations. These include when it is desirable to avoid promotion, when a value-returning function is to be extracted from a scattered set of assignments to a variable, and when side effects are present in the program from which the procedure is to be extracted

Code extraction algorithms which unify slicing and concept assignment

One approach to reverse engineering is to partially automate subcomponent extraction, improvement and subsequent recombination. Two previously proposed automated techniques for supporting this activity are slicing and concept assignment. However, neither is directly applicable in isolation; slicing criteria (sets of program variables) are simply too low level in many cases, while concept assignment typically fails to produce executable subcomponents. This paper introduces a unification of slicing and concept assignment which exploits their combined advantages, while overcoming their individual weaknesses. Our 'concept slices' are extracted using high level criteria, while producing executable subprograms. The paper introduces three ways of combining slicing, and concept assignment and algorithms for each. The application of the concept slicing algorithms is illustrated with a case study from a large financial organisation

Amorphous procedure extraction

The procedure extraction problem is concerned with the meaning preserving formation of a procedure from a (not necessarily contiguous) selected set of statements. Previous approaches to the problem have used dependence analysis to identify the non-selected statements which must be 'promoted' (also selected) in order to preserve semantics. All previous approaches to the problem have been syntax preserving. This work shows that by allowing transformation of the program's syntax it is possible to extract both procedures and functions in an amorphous manner. That is, although the amorphous extraction process is meaning preserving it is not necessarily syntax preserving. The amorphous approach is advantageous in a variety of situations. These include when it is desirable to avoid promotion, when a value-returning function is to be extracted from a scattered set of assignments to a variable, and when side effects are present in the program from which the procedure is to be extracted

Program simplification as a means of approximating undecidable propositions

We describe an approach which mixes testing, slicing, transformation and formal verification to investigate speculative hypotheses concerning a program, formulated during program comprehension activity. Our philosophy is that such hypotheses (which are typically undecidable) can, in some sense, be `answered' by a partly automated system which returns neither `true' nor `false' but a program (the `test program') which computes the answer. The motivation for this philosophy is the way in which, as we demonstrate, static analysis and manipulation technology can be applied to ensure that the resulting test program is significantly simpler than the original program, thereby simplifying the process of investigating the original hypothesi