Dump engineering is an important part in production processes of open-pit mining. In order to complete the mine production tasks smoothly, it is necessary to make the most of land possessed by the dump in an economical and reasonable way. In the paper, we use the dump of Qidashan iron mine which belongs to Anshan Iron and Steel Group as an engineering background to achieve the aim of improving ...

INTRODUCTION Changes in sensorimotor function and increased trunk muscle fatigability have been identified in patients with chronic low back pain (cLBP). This study assessed the control of trunk force production in conditions with and without local erector spinae muscle vibration and evaluated the influence of muscle fatigue on trunk sensorimotor control. METHODS Twenty non-specific cLBP pati...

OBJECTIVE Posterior accessed lumbar interbody fusion (PALIF) has a clear objective to restore disc height and spinal alignment but surgeons may occasionally face the converse situation and lose lumbar lordosis. We analyzed retrospective data for factors contributing to a postoperative flat back. METHODS A total of 105 patients who underwent PALIF for spondylolisthesis and stenosis were enroll...

We present a study of elliptic flow (v 2) and two-particle azimuthal correlations of charged hadrons and high transverse momentum (p T) pions measured by the CERES experiment in Pb+Au collisions at √ s = 17 GeV. Azimuthal anisotropy v 2 increases linearly with p T to a value of 10% at p T = 1.5 GeV/c. Beyond this p T the slope decreases indicating a possible saturation at high p T. Two-pion azi...

The goal of any ambulatory patient is to maintain a horizontal gaze with the least amount of energy expenditure. With progressive deformity, and in particular sagittal malalignment, significant compensatory mechanisms must be used to achieve this goal. Each pelvis dictates the amount of lumbar lordosis required through its morphometric parameter pelvic incidence. The pelvis may compensate for d...

STUDY DESIGN A case-control study. OBJECTIVES To examine the function of the diaphragm during postural limb activities in patients with chronic low back pain and healthy controls. BACKGROUND Abnormal stabilizing function of the diaphragm may be an etiological factor in spinal disorders. However, a study designed specifically to test the dynamics of the diaphragm in chronic spinal disorders ...

BACKGROUND Occupations that require prolonged periods of standing have been associated with increased reports of musculoskeletal disorders including low back pain. Previous work has utilized a prospective design of functionally inducing low back pain in previously asymptomatic individuals during a prolonged standing task. Increased trunk and gluteus medius muscle co-activation has been found in...

AIM The aim of this study was to investigate the effect of continuous ultrasound (US) plus exercise on the endurance of paravertebral muscles of patients with chronic non specific low back pain (CNSLBP). METHODS AND MATERIALS In this pilot, pretest-posttest study, 22 patients with CNSLBP participated. Patients received 10 sessions of treatment, including continuous US plus exercise therapy, o...

The general intent of these studies is to assess whether or not a slope is considered to be stable and, if not, to provide a “safe” set-back distance from the slope crest behind which structures and other facilities can be constructed. Unstable slopes and the land located between the unstable slope and the set-back line are called “Hazard Lands.” In a broad sense, Hazard Lands are those at risk...