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The authors observe experimentally optical bistability enhanced through Fano interferences in high-Q localized silicon photonic crystal resonances ͑Q ϳ 30 000 and modal volume ϳ0.98 cubic wavelengths͒. This phenomenon is analyzed through nonlinear coupled-mode formalism, including the interplay of ␹ ͑3͒ effects such as two-photon absorption and related(More)
This paper presents photonic devices with 3 dB/cm waveguide loss fabricated in an existing commercial electronic 45 nm SOI-CMOS foundry process. By utilizing existing front-end fabrication processes the photonic devices are monolithically integrated with electronics in the same physical device layer as transistors achieving 4 ps logic stage delay, without(More)
BACKGROUND We studied the incidence and clinical significance of early post-traumatic seizures after severe closed head injury. METHODS This prospective study is based on clinical observation of 3340 adult patients with severe closed head injuries, each of them having a Glasgow Coma Scale (GCS) 3 to 8 after trauma. Anticonvulsant agents were not given to(More)
The incidence and clinical significance was studied in 2574 closed head injury patients, each of them having a Glasgow Coma Scale (GCS) 9 to 12 after trauma. All patients underwent computerized tomography (CT) after being admitted to the emergency service. One hundred and six patients (4.1%) experienced seizures within 1 week after head injury; 46 of these(More)
Trisomy 21 usually results from nondisjunction during meiosis I. In order to determine whether nondisjunction results from failure of normal chromosome pairing or premature unpairing, recombination frequencies were estimated between DNA polymorphic markers on the long arm of chromosome 21 in families containing one individual with trisomy 21. The(More)
Solitons are nonlinear waves that exhibit invariant or recurrent behaviour as they propagate. Precise control of dispersion and nonlinear effects governs soliton propagation and, through the formation of higher-order solitons, permits pulse compression. In recent years the development of photonic crystals—highly dispersive periodic dielectric media—has(More)
The unique linear and massless band structure of graphene in a purely two-dimensional Dirac fermionic structure has led to intense research in fields ranging from condensed matter physics to nanoscale device applications covering the electrical, thermal, mechanical and optical domains. Here, we report three consecutive first observations in graphene–(More)
A 30-year-old woman had an arachnoid cyst in the trigone of the right lateral ventricle 5 years before she developed episodic auditory and visual hallucinations as well as delusions of persecution. The psychotic episodes tended to occur after the patient had lain in bed for 1 to 2 hours. After craniotomy and wide excision of the cystic membrane, draining(More)
With the advent of transthoracic video-assisted endoscopic electrocautery of the second and the third sympathetic ganglia for the treatment of palmar hyperhidrosis, it is possible to approach the stellate ganglia with ease. To see whether stimulation of stellate ganglia in humans is similar to the case in dogs, we stimulated the sympathetic ganglia in 18(More)
L1 sequences are a human-specific family of long, interspersed, repetitive elements, present as approximately 10(5) copies dispersed throughout the genome. The full-length L1 sequence is 6.1 kilobases, but the majority of L1 elements are truncated at the 5' end, resulting in a fivefold higher copy number of 3' sequences. The nucleotide sequence of L1(More)