Model lattices consisting of balls connected by central-force springs provide much of our understanding of mechanical response and phonon structure of real materials. Their stability depends critically on their coordination number z. d-dimensional lattices with z = 2d are at the threshold of mechanical stability and are isostatic. Lattices with z < 2d exhibit zero-frequency "floppy" modes that ...

The pathogenesis of the floppy valve syndrome is not fully solved. An almost invariable histological finding is the great accumulation of mucinous material in the valve leaflets and constitutes the basis of the valvular theory of the syndrome. The presence of a mucinous layer in normal valves-- the zona spongiosa--is not well recognised. To establish the normal range of the extent of this zone,...

OBJECTIVE Given the demonstrated effectiveness of medical treatment together with the eminent acceptance of the laparoscopic approach, the indications of surgery in the treatment of gastroesophageal reflux disease (GERD) are currently subject to continuous controversy. To participate in this debate, we have the following work hypothesis: "The results of the 360 masculine short and floppy laparo...

PURPOSE To report the diagnosis and management of a patient with chronic ophthalmic topical anesthetic abuse and floppy eyelid syndrome. METHODS We describe the case of a 47-year-old man suffering from persistent bilateral ocular irritation and chronic corneal erosions. RESULTS The patient was hospitalized in our ophthalmology department and underwent thorough ophthalmic, systemic, and psyc...

Objective: given the demonstrated effectiveness of medical treatment together with the eminent acceptance of the laparoscopic approach, the indications of surgery in the treatment of gastroesophageal reflux disease (GERD) are currently subject to continuous controversy. To participate in this debate, we have the following work hypothesis: “The results of the 360o short and floppy laparoscopic f...

The pediatric neurologist is regularly asked to evaluate a hypotonic patient. This consultation request usually occurs in 2 different situations; the first is in the newborn period when the neurologist is asked to evaluate the "floppy infant," and the second is in the latter half of the first year of life and is usually accompanied by concern about the developmental progress of the infant and, ...

Infantile hypotonia or floppy infant is a diagnostic challenge when it presents with other presenting complaints such as fever, cough or diarrhea. Many times the hypotonia goes unnoticed when other symptom covers the hypotonia and child continues to receive the treatment for other symptoms. We report a rare case from Nepal of infantile Pompe disease who presented with the history of fever and c...