s 290 behavioral research reports in the field of special education. Discusses cognitive thinking, sensory disorders, cer­ ebral dysfunctions, orthopedic and special health problems, speech and language im­ pairments, emotional disturbance, delin­ quency, and administration of special ed­ ucation. 4. Luria, A. R. (editor). The Mentally Retarded Child. New York: Macmil­ lan, 1963. Pp. 208. A ser...

Theories as to the etiology of amblyopia (also called amblyopia ex anopsia, strabis­ mus amblyopia, and amblyopia without ophthalmoscopic signs) may roughly be divided into two groups depending upon whether the primary defect is postulated in the cere­ bral cortex or in the retina. Wald and Burian who are among the most lucid ad­ vocates of the former position described measurements on five cas...

To assess the contribution to mutagenesis by human DNA repair defects, a UV-treated shuttle vector plasmili, p/.189, was passed through fibroblasts derived from Japanese \eroderma pigmentosum (XP) patients in two different DNA repair complementation groups (A and F). Patients with XP have clinical and cellular UV hypersensitivity, increased fre quency of skin cancer, and defects in DNA repair. ...

It makes swept insertion and return loss measurements simultaneously, overa wide frequency range. TO THE MICROWAVE ENGINEER, an instru ment that measures insertion and return loss simultaneously, over a broad band, would be as useful as is the voltmeter to other electronic special ists, provided it is made practical in several im portant ways. • Its measurements must really refer to the micro...

dis or der af fect ing ap prox i mately 1 in 10,000 male. The dis ease is caused by a de fi ciency of co ag u la tion fac tor VIII (FVIII) re sult ing from mu ta tions in the FVIII gene. Nu cle o tide sub sti tu tions/in ser tions of var i ous sizes have been iden ti fied through out the FVIII gene. This ge netic di ver sity ac counts for the ob served het er o ge ne ity in clin i cal se ver it...

enables resection of large or nonlifting gastrointestinal epithelial neoplasms in an en bloc fashion. However, the high fre− quency of complications and the com− plexity of the procedure need to be im− proved [1±4]. In collaboration with the Pentax Corporation, Tokyo, Japan, we have therefore invented a novel electro− surgical knife for ESD, called the splash needle (DN−2618A; Pentax Corp.), wh...

This study presents a basic idea for the self·excitation mechanism of reed valves in refrigerant compressors used for air conditioners or refrigera· tors. The detailed experimental data on the phase lag of fluid pressure, which were obtained from a forced vibration test on a simple axisymmetrical model, namely a resonator, composed of the valve, the valve plate, the cylinder and the piston, wer...

AB STRACT Im prove ments in de vice de vel op ment and quasi-op ti cal cou pling tech niques uti liz ing pla nar an ten nas have led to a sig nif i cant achieve ment in low noise submillimeter wave re cei v ers at pro gres sively higher fre quen cies. Hot Elec tron Bolometric (HEB) re ceiv ers made of thin film super con duct ing films such as NbN have pro duced a vi a ble op tion for in stru m...