Compact Structural Test Generation for Analog Macros

A structural, fault-model based methodology for the generation of compact high-quality test sets for analog macros is presented. Results are shown for an IV-converter macro design. Parameters of so-called test configurations are optimized for detection of faults in a fault-list and an optimal selection algorithm results in determining the best test set. The distribution of the results along the parameter-axes of the test configurations is investigated to identify a collapsed high-quality test se

Presumed Metastasis of Breast Cancer to the Abducens Nucleus Presenting as Gaze Palsy

A 51-year-old woman with breast cancer presented with progressive diplopia. Neuro-ophthalmologic examination revealed right gaze palsy and peripheral facial nerve palsy. Brain magnetic resonance imaging (MRI) was normal. However, two months later a repeat brain MRI revealed an enhancing round nodular mass at the right facial colliculus of the lower pons, at the location of the abducens nucleus. Localized metastasis to the abducens nucleus can cause gaze palsy in a patient with breast cancer

Structural Test Generation for Embedded Analog Macros

A methodology for structural fault-model based test generation for embedded analog macros in mixed-signal ICs is presented. From the IClevel, parameters reflecting the testability limitations faced by an analog macro under test (MUT) due to surrounding macros are extracted. This method is also suited for quantifying testability reduction and identification of efficient test insertion points. The parameters are used as integrated part of a structural generation method for compact test sets for analog macros, which deals with the macro at transistor level. I. Introduction Nowadays, digital IC test generation is a fully automated, fault-model oriented and fast process. Analog as well as mixed-signal (functional) IC test development generally requires a time-consuming, manual effort. Structural fault-model based test generation for analog macros in mixed-signal ICs has been recognized as a promising alternative or addition to cope with today's time-to-market and high quality demands [1]. ..

On the genesis of aluminum-rich speleothems in a granite cave of NW Spain

Granite massifs often contain caves, with dimensions ranging from a few meters up to 1,000 m, also referred to as pseudokarst. The speleothems in such caves are mostly composed of either Si-rich (commonly opal-A) or Al-rich authigenic mineraloids. Whereas the formation and geochemical composition of opal-A biospeleothems have been studied and are fairly well understood, knowledge on the Al-rich analogues is scarce. This work reports for the first time a study on the composition, accretion process, age and growth rate of an Al-rich speleothem type flowstone from the A Trapa Cave System (Galicia, NW Spain), developed in a granite cave. To understand the growth process, trickling water was analyzed and the deposition environment inside the cave was characterized. We found that the speleothems are alternating Si- and Al-rich layered deposits formed between 1,635 ± 75 and 1,243 ± 58 cal BP by percolating water that carries underground mineral grains, dissolved ions, and organic matter from soil and the weathered bedrock above the cave