Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Lifting”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,063 records · Page 59Linked to original sources
PubMed2006

Image registration based on lifting process: an application to digital subtraction radiography.

In this paper, a digital subtraction radiology scheme is presented based on a new method for the automatic registration of dental radiographs acquired with or without rigorous a priori standardization. The scheme is comprised of an automatic registration method and a subtraction process. The proposed registration method can be considered as an object-based registration method without imposing the prerequisite of image segmentation in order to detect the boundary of the objects of interest or the automatic detection of matching landmarks. This is achieved by augmenting the dimensionality of the problem from two-dimensional gray-level matching to three-dimensional surface matching using the process of lifting in combination with a surface-matching technique. The pseudo three-dimensional affine transformation that matches the lifted images incorporates advantageous characteristics including spatial alignment of the surfaces, anisotropic correction of brightness/contrast differences, and stable convergence of the similarity function to its optimal value. The performance of the proposed automatic registration method is assessed against a manual method based on the projective transformation. The qualitative and quantitative assessments of the experiments have shown advantageous performance of the proposed automatic registration method against the manual one. Finally, the proposed registration method has been further improved in terms of execution time by the implementation of a surface decimation process.

Algorithms↗
PubMed1997

Harlequin ichthyosis keratinocytes in lifted culture differentiate poorly by morphologic and biochemical criteria.

Harlequin ichthyosis (HI) is a severe congenital ichthyosis in which massively thickened stratum corneum with abnormal barrier function often results in death of affected newborns. Survivors evolve into a severe nonbullous ichthyosiform erythroderma. Previously we have ascertained three biochemical phenotypes of HI, based on abnormal profilaggrin and K6 and K16 expression in epidermis. Submerged cultures of HI keratinocytes differentiated abnormally, but the three phenotypes were indistinguishable in vitro. We hypothesized that differentiation in submerged culture was insufficient to reflect in vivo biochemical abnormalities or that dermal components might be necessary for expression. To test these hypotheses HI keratinocytes and fibroblasts (n = 3) were grown on collagen gels at the air-medium interface in a cross-over design with normal keratinocytes and fibroblasts. Epithelia derived from lifted cultures were studied by light microscopy and immunocytochemistry and extracted for western blot analysis. In contrast to our prediction, lifted cultures of HI keratinocytes formed a poorly differentiated epithelium, and normal keratinocytes formed an epidermal-like tissue with expression of K1 and expression and processing of profilaggrin to filaggrin. In addition, the presence of HI fibroblasts consistently altered differentiation of both HI and normal keratinocytes, resulting in less complete morphologic differentiation. The findings suggest that both epithelial and mesenchymal elements of the skin from HI are affected but that the primary abnormality lies in the keratinocytes.

Adult↗
PubMed2004

Combining Ar ion milling with FIB lift-out techniques to prepare high quality site-specific TEM samples.

Focused ion beam (FIB) techniques can prepare site-specific transmission electron microscopy (TEM) cross-section samples very quickly but they suffer from beam damage by the high energy Ga+ ion beam. An amorphous layer about 20-30 nm thick on each side of the TEM lamella and the supporting carbon film makes FIB-prepared samples inferior to the traditional Ar+ thinned samples for some investigations such as high resolution transmission electron microscopy (HRTEM) and electron energy loss spectroscopy (EELS). We have developed techniques to combine broad argon ion milling with focused ion beam lift-out methods to prepare high-quality site-specific TEM cross-section samples. Site-specific TEM cross-sections were prepared by FIB and lifted out using a Narishige micromanipulator onto a half copper-grid coated with carbon film. Pt deposition by FIB was used to bond the lamellae to the Cu grid, then the coating carbon film was removed and the sample on the bare Cu grid was polished by the usual broad beam Ar+ milling. By doing so, the thickness of the surface amorphous layers is reduced substantially and the sample quality for TEM observation is as good as the traditional Ar+ milled samples.

Journal Article↗
PubMed1990

The face lift and ancillary procedures.

In this article, face lift, forehead lift, and blepharoplasty procedures are addressed. Special emphasis is made on anatomical and surgical guidelines. Some results and complications of the different procedures are presented.

Eyelids↗
PubMed1991

The effectiveness of occipital artery ligations as a priming procedure for extensive scalp-lifting.

Extensive scalp-lifting is a relatively new cosmetic scalp procedure that involves cutting both occipital arteries, which then allows undermining of the entire donor dominant scalp down to the hairline of the nape. Because of this more extensive undermining, dramatic improvements are accomplished even with one operation. Conversely, one can develop necrosis at the nuchal ridge because of a sudden curtailment of circulation in the occipital region. In an attempt to eliminate this complication, the author experimented with "horizontal incision ligations" of the occipital arteries 4 to 8 weeks prior to the surgery which resulted in a significant reduction in the average size of necrosis (from 3.1 cm2 to 1.6 cm2; P = .036) but no significant difference in the incidence (P = .49). When these patients did develop necrosis, it always occurred below the horizontal incisions--therefore, the procedure was changed to vertical incisions, which to date have yielded a significant protective effect when compared with the previous method of "horizontal incision ligations" (P = .014), and even greater significance when compared with the original method of no previous ligations (P = .012). Vertical-incision ligation performed 4 to 8 weeks prior to surgery is an optimal method for preventing the complication of necrosis after extensive scalp-lifting surgery.

Adult↗
PubMed1994

Circumferential scalp reduction. The application of the principles of extensive scalp-lifting for the improvement of scalp reduction surgery.

BACKGROUND. Conventional scalp reduction techniques involve the undermining of bald skin, inducing the problems of stretch-back and slot formation in the majority of patients. Conversely, extensive scalp-lifting, a relatively new technique, never undermines bald skin; therefore, the problem of stretch-back is minimal and slot formation is reduced. This procedure, however, is more intricate, owing to the undermining down to the hairline of the nape. Because not all cosmetic hair replacement surgeons desire to perform this more intricate surgery, the author takes many of the principles of scalp-lifting and applies them to the scalp reduction procedure. With the application of these principles, many of the problems of scalp reduction surgery are significantly reduced and other aesthetic aspects improved.

Alopecia↗
PubMed2004

Anterior face-lift for correction of middle face aging utilizing a minimally invasive technique.

OBJECTIVE: A minimally invasive face-lifting approach aimed at rejuvenation of the midface was examined, for patients with concerns limited to midfacial aging. METHODS: An incision in the preauricular area and then minor undermining to lift superfical musculo apponeurotic system (SMAS), followed by SMAS plication and removal of skin laxity in the midface, results in excellent superolateral reversal of inferomedial displacement of the aging vector. RESULTS AND CONCLUSION: A minimally invasive procedure was performed easily under local anesthesia in an office/ambulatory surgery center setting.

Adult↗
PubMed2006

Gelatine lifting, a novel technique for the examination of indented writing.

The limitations of the examination of indented writing impressions using electrostatic detection are often paper related. Paper types such as glossy paper, paper of high basis weight, and lithography or gravure-printed papers often give rise to problems resulting in a decrease in sensitivity or a lack of detection altogether. In this paper, a novel technique for the examination of indented writing is presented, which is in a sense complimentary to the technique of electrostatic detection as it is especially suitable for glossy-coated and printed paper types and can in some instances also deal with paper types of higher basis weight. Indented writing grooves will normally contain more particles than the surrounding nonindented areas due to damage of the surface layer resulting in a build-up of filler powder. The method presented uses black gelatine lifter slabs to lift the paper dust image off the surface of the paper. This image can quite easily be photographed using near-to-coaxial lighting. The gelatine lifting method outperforms oblique lighting for the detection of indented writing and is almost as sensitive as electrostatic detection if compared on the types of paper where both perform well. The main advantage of this new technique is, however, that it is especially suitable for those types of paper where electrostatic detection fails and is therefore a welcome addition to the range of methods available to a forensic document examiner for the examination of indented writing.

Journal Article↗
PubMed2004

Leading-edge vortex lifts swifts.

The current understanding of how birds fly must be revised, because birds use their hand-wings in an unconventional way to generate lift and drag. Physical models of a common swift wing in gliding posture with a 60 degrees sweep of the sharp hand-wing leading edge were tested in a water tunnel. Interactions with the flow were measured quantitatively with digital particle image velocimetry at Reynolds numbers realistic for the gliding flight of a swift between 3750 and 37,500. The results show that gliding swifts can generate stable leading-edge vortices at small (5 degrees to 10 degrees) angles of attack. We suggest that the flow around the arm-wings of most birds can remain conventionally attached, whereas the swept-back hand-wings generate lift with leading-edge vortices.

Animals↗
PubMed1996

Development of a rapid and specific colony-lift immunoassay for detection and enumeration of Campylobacter jejuni, C. coli, and C. lari.

Contamination of retail poultry by Campylobacter spp. is a significant source of human diarrheal disease. We have developed a colony-lift immunoassay (CLI) for the detection of Campylobacter jejuni, C. coli, and C. lari isolated from such sources and grown on selective agar medium or on filter membranes. This technique has been successfully utilized to quantify Campylobacter colonies within 18 to 28 h after sampling. Hydrophobic, high-protein-binding membranes were prewet with methanol and used to imprint bacterial cells from the agar or filter membrane, while leaving colonies intact and viable. The membranes were air dried, peroxidase neutralized, blocked with bovine serum albumin in phosphate-buffered saline, and hybridized for 5 min with an affinity-purified, horseradish peroxidase-labeled goat anti-Campylobacter antibody preparation (Kirkegaard and Perry Laboratories). The membranes were washed briefly, exposed to a 3,'5,5'-tetramethylbenzidine membrane substrate, rinsed in deionized water, and allowed to dry. Lifted colonies of Campylobacter were identified by a blue color reaction on the membrane. Replicas of the membranes were made by marking the location of the Campylobacter colonies on clear transparencies, which were subsequently utilized to locate the original colony on the filter membrane or agar plate. The specificity of this antibody preparation has been evaluated against a wide range of Campylobacter spp., including American Type Culture Collection type and references strains, retail poultry isolates, and isolates obtained from cloacal swabs of live commercial broiler chickens. Specificity against numerous non-Campylobacter spp. obtained from the same sources was also evaluated. The CLI provided a rapid and simple means for detection and enumeration of enteropathogenic Campylobacter organisms. We have successfully combined this CLI procedure with methods recently developed in our laboratories for retail meat and poultry sampling. Potentially, broader applications for use of this technique include detection and enumeration of campylobacters from clinical, veterinary, and environmental samples.

Agar↗
PubMed1978

Comparison of metabolic and ventilatory responses of men to various lifting tasks and bicycle ergometry.

Four male volunteers served as subjects to examine the metabolic and ventilatory cost of both positive and negative lifting tasks as compared to bicycle ergometry. In different experiments, four boxes weighing 0.91, 6.82, 22.73, and 36.36 kg were lifted up to or down from a height of 60 cm at rates as high as 70 lifts/min for periods of 4 min. The data were then compared to those obtained from bicycling at a rate of 50 rpm at work loads up to 1,500 kmp/min. Work at any given box weight had a substantially higher oxygen and ventilatory cost than similar levels of work on the bicycle ergometer. The reason for these differences appeared to lie in the energy cost of moving parts of the body. When the weight of the boxes was low, there was little difference between the oxygen cost of positive and negative work, but as the weight of the boxes increased, the expected physiological differences in positive and negative work was established.

Adult↗
PubMed1994

Absent-mindedness and shop-lifting--a case study.

This article briefly reviews the literature describing the role of absent-mindedness in shop-lifting. In addition, a case study is described which illustrates how a psychological formulation of such cognitive failures can aid the forensic clinician's understanding of shop-lifting.

Adult↗
PubMed1999

Accidental hanging with delayed death in a lift.

While hanging is a common method of committing suicide in India, accidental hanging is uncommon. However, it does occur when people are engaged in auto-erotic practices. An adult male who was helping passengers trapped in the lift of an outpatient department at a teaching hospital was accidentally hanged. He survived for 39 days. This case highlights a rare but serious hazard in the use of lifts.

Accidents, Occupational↗
PubMedDate not supplied

Rhytidectomy (face-lift) in the otolaryngologic practice.

A surgical procedure is described that minimizes the lifting of the hairline in rhytidectomy by locating most of the incision inside the hair. Traction of the skin is directed at producing a soft, rounded contour. The author reports good results on 30 patients in two years' time. Appropriateness of rhytidectomy depends on psychologic factors and on biologic rather than chronologic age. Operation under general anesthesia is preferred and should be confined to a simple procedure. However, blepharoplasty, rhinoplasty, and mentoplasty are often performed at the same time. Forehead lifting is a desirable associated procedure in which the incisions can be joined. Cutting of the muscle fibers is preferred to resection of the frontal corrugator. Minilifting to obtain Oriental slant eyes is considered a wasted effort.

Anesthesia, General↗
PubMed2001

Lift-based paddling in diving grebe.

To examine the hydrodynamic propulsion mechanism of a diving great crested grebe (Podiceps cristatus), the three-dimensional kinematics was determined by digital analysis of sequential video images of dorsal and lateral views. During the acceleration phase of this foot-propelled bird, the feet move through an arc in a plane nearly normal to the bird's line of motion through the water, i.e. the toes move dorsally and medially but not caudally relative to the water. The kinematics of the grebe's lobed feet is different from that in anseriforms, whose feet move in a plane mostly parallel to the bird's line of progress through the water. Our results suggest that the foot-propelled locomotor mechanism of grebes is based primarily on a lift-producing leg and foot stroke, in contrast to the drag-based locomotion assumed previously. We suggest that the lift-based paddling of grebes considerably increases both maximum swimming speed and energetic efficiency over drag-based propulsion. Furthermore, the results implicate a new interpretation of the functional morphology of these birds, with the toes serving as a self-stabilizing multi-slotted hydrofoil during the power phase.

Animals↗
PubMed1995

[A CAE (computer aided engineering) approach to dynamic whole body modeling--the forces iin the lumbar spine in asymmetrical lifting].

Biomechanical models of the human body play an important role in the analysis of the mechanical loading of the musculo-skeletal system. The whole-body model presented in this paper is based on a CAE (Computer Aided Engineering) program that permits the dynamic simulation of complex systems of rigid bodies. The model we developed on this basis consisted of 19 segments and 18 joints. The experimental data are derived from the 3D motion analysis system VICON, which is provided with 5 cameras, a force-plate and a 10-channel EMG recorder. The kinematic data are fed into the simulator after first being processed in a special manner to generate drivers for joint angles. The model was first used to calculate the compression forces generated within the lumbar spine during the asymmetric lifting and putting down of a 15 kg stone. The quasistatic calculation shows a dynamic contribution to the compression forces generated during the lifting of 11%. Increasing or decreasing the inertial moments of the segments by the factor 2 had an effect of less than 1% with the identical movement.

Biomechanical Phenomena↗
PubMed2005

[Subperiosteal midface lift: an alternative to correct the cicatricial eyelid ectropion].

PURPOSE: To show the subperiosteal midface lift as an option to treat cicatricial eyelid ectropion. METHODS: Nine patients submitted to 12 surgeries to correct cicatricial eyelid ectropion, were evaluated according sex, age and treatment results. All the patients had the surgery done under local anesthesia and the midface was repositioned by sutures. RESULTS: According to our observations only two eyelids did not have good improvement with the procedure and few complications occurred. CONCLUSION: The subperiosteal midface lift is effective and a good option to correct the cicatricial eyelid ectropion.

Aged↗
PubMed2000

[Moving and lifting patients: postural and ergonomic aspects].

The most dangerous and difficult tasks faced by health workers are those procedures involved with lifting and moving patients. Therefore, training and recycling programs in lifting procedures are a compulsory part of programs for the prevention of musculoskeletal disorders in schools and health institutions. The present study presents basic and innovative orientation with an ergonomic approach regarding these procedures, together with the use of devices.

Ergonomics↗