Multistep Measurement of Plantar Pressure Alterations Using Metatarsal Pads

Metatarsal pads are frequently prescribed for nonoperative management of metatarsalgia due to various etiologies. When appropriately placed, they are effective in reducing pressures under the metatarsal heads on the plantar surface of the foot. Despite the positive clinical reports that have been cited, there are no quantitative studies documenting the load redistribution effects of these pads during multiple step usage within the shoe environment. The objective of this study was to assess changes in plantar pressure metrics resulting from pad use. Ten normal adult male subjects were tested during a series of 400-step trials. Pressures were recorded from eight discrete plantar locations at the hindfoot, midfoot, and forefoot regions of the insole. Significant increases in peak pressures, contact durations, and pressure-time integrals were noted at the metatarsal shaft region with pad use (P ≤ .05). Statistically significant changes in metric values were not seen at the other plantar locations, although metatarsal pad use resulted in mild decreases in mean peak pressures at the first and second metatarsal heads and slight increases laterally. Contact durations decreased at all metatarsal head locations, while pressure-time integrals decreased at the first, second, third, and fourth metatarsal heads. A slight increase in pressure-time integrals was seen at the fifth metatarsal head. The redistribution of plantar pressures tended to relate not only to the dimensions of the metatarsal pads, but also to foot size, anatomic foot configuration, and pad location. Knowledge of these parameters, along with careful control of pad dimensions and placement, allows use of the metatarsal pad as an effective orthotic device for redistributing forefoot plantar pressures

Environment-dependent dissipation in quantum Brownian motion

The dissipative dynamics of a quantum Brownian particle is studied for different types of environment. We derive analytic results for the time evolution of the mean energy of the system for Ohmic, sub-Ohmic and super-Ohmic environments, without performing the Markovian approximation. Our results allow to establish a direct link between the form of the environmental spectrum and the thermalization dynamics. This in turn leads to a natural explanation of the microscopic physical processes ruling the system time evolution both in the short-time non-Markovian region and in the long-time Markovian one. Our comparative study of thermalization for different environments sheds light on the physical contexts in which non-Markovian dissipation effects are dominant.Comment: 10 pages, 6 figures, v2: added new references and paragraph

Mountain glacier chronology from Boulder Lake, New Zealand, indicates MIS 4 and MIS 2 ice advances of similar extent.

Dating of past glaciation in New Zealand allows Quaternary climatic events to be identified in areas at a great distance from northern hemisphere ice sheets and associated climatic feedbacks. Moreover, climate reconstruction in New Zealand provides insight into the amount of climate change that occurred in the Southwest Pacific where zonal circulation is an important integrator of the climate signal. Boulder Lake is a relatively low-elevation cirque in a range of moderate-relief (similar to 1600 m) mountains in South Island of New Zealand, and it experienced cirque and valley glaciation during the Late Quaternary. Geomorphic mapping. Be-10 and Al-26 exposure. and luminescence dating provide evidence for glacial advances during the Last Glacial Cycle, specifically during Marine Isotope Stage 4 (MIS 4) and Marine Isotope Stage 2 (MIS 2). The MIS 4 advance was fractionally larger and is dated by a former ice-marginal lacustrine deposit (minimum age) with a basal Optically Stimulated Luminescence (OSL) sediment deposition age of 64.9 +/- 10 ka. Paired Be-10 and Al-26 constrain a slightly less extensive MIS 2 glacial advance to 18.2 +/- 1.0 and 17.8 +/- 0.9 ka, coincident with the Last Glacial Maximum (LGM). Glacial equilibrium-line altitudes during both MIS 4 and MIS 2 phases were similar to 960 in lower than the present. This corresponds to a cooling of 5-7 degrees C, taking possible precipitation variability into account. Our findings and a growing number of publications indicate that many temperate valley glaciers reacted differently to the major ice sheets during the Last Glacial Cycle, reaching their Maximum extent during MIS 4 rather than during peak global ice volume during MIS 2. © 2008, Institute of Arctic and Alpine Researc

Audit of clinical documentation of external genitalia examination findings in the newborn: The Benin-city experience

Background: Over the years, poor medical documentation is a well known phenomenon in medical practice but the magnitude of the problem in our setting has not been defined.Objective: To assess the overall frequency of missed detection of anomalies of external genitalia following the routine newborn physical examination and to describe the general pattern of its documentation.Methods: In this hospital-based descriptive cross-sectional study, 915 full-term newborn infants in an open population survey were systematically screened for anomalies of the external genitalia, using a checklist derived by modifying parameters in the Prader scoring system and the External masculinization score charts. The pattern of documentation was assessed in 915 case files. The findings of the researchers were then compared to those previously documented by the attending physician/midwife. The study was conducted in two Nigerian hospitals (University of Benin Teaching Hospital and St Philomena Catholic Hospital) in Benin City. All members of staff of the two hospitals were blinded to the fact that the previous examination findings documented in the case files were being assessed during this study.Results: Of the 915 infants, 19 (2.1%; 95% CI= 1.2-3.0) had anomaly of the external genitalia at birth. The overall frequency of missed diagnosis of external genital anomalies was 68.4% with undescended testes (UDT) being the most frequently missed. The level of documentation of the findings of the external genital examination was poor in both hospitals. Combining the two hospitals, the external genital examination findings were not documented in 76.1% of case files.Conclusions: The routine newborn examination as currently practiced in the two hospitals was weak in detecting external genital anomalies. Poor documentation of the external genital findings is a common occurrence in the setting where we practice, irrespective of whether the health institution is tertiary or secondary.Key words: Audit, clinical documentation, external genitalia anomalies, missed diagnosis, routine newborn examination

Dynamically stabilized decoherence-free states in non-Markovian open fermionic systems

Decoherence-free subspaces (DFSs) provide a strategy for protecting the dynamics of an open system from decoherence induced by the system-environment interaction. So far, DFSs have been primarily studied in the framework of Markovian master equations. In this work, we study decoherence-free (DF) states in the general setting of a non-Markovian fermionic environment. We identify the DF states by diagonalizing the non-unitary evolution operator for a two-level fermionic system attached to an electron reservoir. By solving the exact master equation, we show that DF states can be stabilized dynamically.Comment: 11 pages, 3 figures. Any comments are welcom

Observation of Scarred Modes in Asymmetrically Deformed Microcylinder Lasers

We report observation of lasing in the scarred modes in an asymmetrically deformed microcavity made of liquid jet. The observed scarred modes correspond to morphology-dependent resonance of radial mode order 3 with their Q values in the range of 10^6. Emission directionality is also observed, corresponding to a hexagonal unstable periodic orbit.Comment: 4 pages, 6 figure

Electronic and optical properties of LiBC

LiBC, a semiconducting ternary borocarbide constituted of the lightest elements only, has been synthesized and characterized by x-ray powder diffraction, dielectric spectroscopy, and conductivity measurements. Utilizing an infrared microscope the phonon spectrum has been investigated in single crystals. The in-plane B-C stretching mode has been detected at 150 meV, noticeably higher than in AlB2, a non-superconducting isostructural analog of MgB2. It is this stretching mode, which reveals a strong electron-phonon coupling in MgB2, driving it into a superconducting state below 40 K, and is believed to mediate predicted high-temperature superconductivity in hole-doped LiBC [H. Rosner, A. Kitaigorodsky, and W. E. Pickett, Phys. Rev. Lett. 88, 127001 (2002)].Comment: 4 pages, 4 figure

A Study to Analyze the Efficacy of Maitland’s Mobilization Technique and Neuromuscular Electrical Stimulation on Pain and Hand Grip Strength in Patients with Post Colle’s Fracture Stiffness

Abstract- BACKGROUND: Colle’s fracture is a very common extra-articular fracture that occurs as the result of a fall on out stretched hand (FOOSH). Although Colle’s fractures are commonly seen in all age groups and demographics, they are particularly common in osteoporotic individuals and as such are more frequently seen in elderly women. Some complications are associated with injury itself. The complications such as persistent neuropathy of median nerve, ulnar nerve or radial nerve, malunited fracture and post traumatic stiffness have been reported in 1 out of 3 patients. Rehabilitation of fractures is a very important thing because of the limitations produced by improper management can lead to stiffness, deformity and limitation of functions. OBJECTIVE: The purpose of the study was to find out the effects of Maitland’s mobilization with Neuro-Muscular Electrical Stimulation (NMES) on pain and hand grip strength in patients with post Colle’s fracture stiffness. DESIGN: Pre- test and Post- test experimental study desig