Light House Research Articles

Quantitating Pressure-Induced Optic Nerve Injury In A Rat Model Of Glaucoma.

Elevated intraocular pressure (IOP) is the most widely recognized risk factor for glaucoma and the target of nearly all current glaucoma therapy. The goal of our laboratory is to understand mechanism by which elevated IOP results in axonal degeneration in the optic nerve.In order to study the effects of IOP level on the optic nerve, we have developed a number of methods to modulate IOP in the rat. We sclerose the aqueous humor outflow pathways to elevate IOP for a period of weeks to produce focal optic nerve lesions. This method reproduces many of the pathological characteristics of human glaucoma. A modification of this method uses constant light (CL) housing to stabilize the normally wide circadian IOP oscillations, simplifying the correlation of IOP history with lesion size. However, the CL-stabilized IOP in untreated, fellow eyes is above the normal light phase IOP of 20 mm Hg and close to the normal dark, phase value of 30 mm Hg.

Wood quality of eighteen year old Cupressus lusitanica from Maharashtra

Physical and mechanical properties of 18 year old Cupressus lusitanica, an exotic to India have been reported. The timber was found to be quite knotty and also possessing compression wood. From the data it appears that the timber is weak in strength properties compared to the standard Indian species, Tectona grandis (teak) and Cedrus deodara (deodar) and it can only be used for light packing cases and rural housing.

In This Parched Land, Lunacy and Love: A Review of "Khamsin", by Moshe Dor

GLEAMING SANDS of gold fell in bewitching folds toward the sea ... a vast haven between blue and green . . . Camel caravans passed, bells clanging on their swaying necks. . . . Beyond . . . stretched a desert of white sand. Out there stood a solitary lamp post like a light house. In the long summer evenings the lamp cast long shadows on the sand. Children would sit around it, telling stories. From that lovely remembrance and evocation of the lay of earth and sky on the Mediterranean coast and the open and impressionable to pography of a child's mind, the acclaimed Israeli poet, Moshe Dor, author of some thirty volumes of poetry and winner of Israel's top literary award, the Bialik Prize, proceeds in Khamsin with a series of meditations on his coming of age as an artist and a man in Israel. The memoirs section, Parched Land, is followed by a selection of poems collected under the rubric More Distant than Lunacy, than Love? This memoir/poetry collection was translated from the original Hebrew by Pulitzer Prize recipient Henry Taylor and fourteen other authors, including Myra Sklarew and Barbara Goldberg. Dor's father was a Zionist-socialist pioneer, who grew up under Romanov despotism and who made aliya by stealthily crossing the Soviet border to migrate to Israel. Dor was born in 1932 and grew up in the Workers' Quarter of Tel Aviv as a precocious book-hungry child who was painfully handicapped by stuttering and who in spite of a desperate longing to fight in the 1948 War of Liberation was deemed too young to join in, a lucky circumstance for we who were spared the misfortune of being denied his poetry. After the war, Dor joined with other writers to form Likrat, the anti-Soviet, anti-bureaucratic literary vanguard in Jerusalem of the early 50s. About the anti-Soviet stance of Likrat in an Israel where Stalinist socialist realism was still a formi dable presence, Dor simply says: Stalin's Soviet Union disgusted me.

The House of Light and Entropy: Inhabiting the American Desert

The House of Light and Entropy: Inhabiting the American Desert

Increased light intensity prevents the age related loss of vasopressin-expressing neurons in the rat suprachiasmatic nucleus

We investigated whether increased light input can counteract the age-related decrease in vasopressin- (AVP) and vasoactive intestinal polypeptide (VIP)-expressing neurons of the suprachiasmatic nucleus (SCN) by determining the numbers of these neurons in rats of different ages, housed under low or high intensities of light. The significant age-related decrease for AVP was prevented in old animals after high light housing. For VIP, no effects were found.

内海における海上風推算手法の開発

We devised a method for the estimation of sea surface winds over coastal area and inland sea. The method is constructed by the combination of open ocean wind model and local wind model. Cardone's boundary layer model and Sherman's MATHEW model are adopted as the respective wind models. The method is applied to Tokyo Bay. Estimated winds are compared with the observations at Tokyo light house, Keiyo sea berth and Chiba marine observation tower. The estimations agree reasonably well with the observations. Based on the result, behavior of heavy winds associated with Typhoon 9119 over the Inland Sea is analysed by use of the method. The results will be used in the analysis of distractive wind waves of Typhoon 9119 in the Inland Sea.

産業連関表による建築物の評価 : その3.住宅建設によるエネルギー消費量,二酸化炭素排出量

Basic sector classification input/output table were applied to analyze the construction cost of single family houses and multi family houses in order to obtain the energy consumption and CO_2 emission. Final energy consumption including direct and indirect use per 1m2 of floor area is 2,000-2,500 Meal for SRC multi family houses, 720 Heal for wooden single family houses, 1,200 Heal for light weight steel-framed single family houses. The amount of CO_2 emission are 900kg/nf, 250 kg/nf, and 420 kg/m2 respectively. Energy Intensity is approximately 7.5 kcal/yen for SRC houses, 4.5 kcal/yen for wooden single family houses, 6 kcal/yen for light weight steel-framed single family houses.

Estimation and Control Method for Abrasion of Offshore Structure Due to Movement of Ice Sheet

The abrasion of offshore structures constructed in cold regions occur when the movement of ice sheets are active during the time of thawing. Theleft-lettore, It is very important in the design of offshore structures for very cold region to estimate the abrasion amount due to a movement of sea ice sheet. Basic studies on the abrasion of various construction materials due to the movement of sea ice have been conducted by Saeki et al. Furthermore, as natural sea ice sheets contain fine sand, the authors also systematically experimented on various materials abrasion by sea ice containing sand. According to the data obtained, the authors propose an estimation method for the actual amount of abrasion on offshore structures. And the authors examined the adequacy of our abrasion estimation method, comparing it to the result of the observations of the light house in the Gulf of Bothnia.

House of Light

House of Light

Application of longshore transport equations to the Andhra coast, east coast of India

Ship-reported waves published in the Indian Daily Weather Report are compiled for a period of 16 years and are used for the estimation of the longshore transport rate. Using the two well known longshore transport equations, viz., the Shore Protection Manual equation and the Komar and Inman equation, the longshore transport rate at Visakhapatnam beach is computed and the values are compared with earlier studies. Based on the inference that the Shore Protection Manual equation yields a better estimate for this region, the same equation is used for the estimation of the longshore transport rate along the Andhra coast. This study shows that the general direction of longshore transport is towards northeast during March to October and southwest during November to February. The longshore transport rate is high during the southwest monsoon period from June to September. A higher sediment transport rate is observed for the coastline oriented at 80 degrees east of north. The annual net transport is found to be quite low at the coastal segments near Ramaypatnam, Machilipatnam and Sacremento Light House, whereas it is found to be high near Nizampatnam, Gollapalem and Narasapur.

Myzus persicae (Sulzer) in diffuse light and dark rustic storages and resultant PLRV transmission

Population levels ofMyzus persicae (Sulzer) were studied on potato tubers in diffuse light and dark rustic storage houses in Peru. No differences in numbers of aphids/sprouted eye on potatoes infested naturally during storage in diffuse light or darkness were observed. Significantly more alate aphids were observed on tubers stored in darkness than in diffuse light storage houses. Viral transmission was occurring during the storage period. The incidence of viral transmission was not significantly influenced by storing tubers in diffuse light or dark storages. There were significantly more plants infected with virus from tubers that had not been sprayed for aphid control than from tubers that had been sprayed

Blow hot—Blow cold

When components made of different materials are combined to make anything mechanical, consideration must be given to the fact that they will not have the same thermal behaviour. Taper roller bearings mounted in light alloy housings provide an example of such a temperature‐sensitive arrangement. Depending on the difference in thermal elongation, large variations in bearing internal clearance can be obtained, and this can have an appreciable effect on the life of the bearings. The adjustment of the bearings on mounting must therefore be carefully determined. A passenger car gearbox with a light alloy casing where the intermediate shaft is supported in two taper roller bearings is studied. When selecting a suitable adjustment, the resilience of the casing must also be taken into account.

Light Intensity and Housing for Pigeons

Four light intensities were used in completely enclosed pigeon houses for 14 hours per 24 hours. Open front pens with only natural light were also used. There were four pens per treatment and five pairs of young, breeding age, White Carneaux per pen for 420 days.Results per treatment, 16, 30, 44 and 61 lumens per sq. m. and open pens, were respectively as follows for each objective: squabs raised—252, 220, 288, 203, and 212 with no significant differences except for the 44 lumen treatment which was higher than all others except 16; body wt./squab in g.—522, 526, 522, 508, and 531 at four weeks of age with no significant differences; feed per squab in kg.—4.7, 5.3, 4.5, 5.5, and 5.1 with only a significant difference between treatments 44 and 61 lumens; percent hatchability—89.7, 82.1, 89.6, 78.0, and 82.9 with no significant differences; percent squabs raised—93.7, 88.7, 97.9, 91.0, and 89.5 with no significant differences.The average number of squabs raised per treatment for all enclosed artificially lighted pens was 241 compared to 212 for the open pens with only natural light.

San Francisco's Nineteenth-Century Egg Basket: The Farallons

URING the past century and a half, man has laid a heavy hand on the birds and mammals of the Farallon Islands. By constructing habitations and navigational aids, he has altered the physical aspect of the largest, most accessible, and most southerly of the group, Southeast Farallon. Current environmental change in the Bay Area continues apace. The imperative that the only good wetland is a reclaimed one dies hard in California; San Francisco Bay's eastern shore will soon be graced by commercial buildings on filled tidelands around Emeryville, and interested parties continue to push for extending SanJose's airport into the tidal flats of the South Bay. However, paradoxically, human traces are being erased from the Farallon Islands. Measures are being implemented to make the Farallons, with the exception of the long-inhabited Southeast Island, a National Wilderness Area in accordance with the Wilderness Act of September 3, 1964.1 The move was precipitated by economy measures planned by the United States Coast Guard to automate the light and to withdraw its crew. For 115 years federal personnel have manned the marine terraces and rugged treeless peaks of Southeast Farallon, twenty-five miles west of the Golden Gate in the Pacific (Fig. 1). During the present century public access to the island has been restricted by the Light House Service and the Coast Guard, partly to prevent interference with the smooth running of the community stationed there, and partly to protect the wildlife of the island from undue disturbance. Since Southeast Farallon is close to the major metropolitan centers that ring San Francisco Bay, the varied marine fauna requires special care, both to allow rehabilitation of depleted populations and to further understanding and appreciation among the general public. With this end in mind the Point Reyes Bird Observatory, with the permission and cooperation of the Coast

Characteristics of sea water near the light house, Bombay : Jayaraman R., R. Viswanathan and S. S. Cogate, 1961. J. Mar. Biol. Ass. Ind., 3 (1 and 2): 1–5

As part of a programme of work on the distribution of surface temperatures and salinities in the Indian Ocean, sea water samples were collected regularly since 1936 near Prongs Reef Light House, Bombay (18° 53'N, 72° 48' E). Besides temperature measurements and salinity determinations, estimations of dissolved oxygen, inorganic phosphate and total phosphorus, using standard methods {vide, Harvey, 1955), were also carried out on the samples. The results are shown graphically in Figs. 1 to 7.

Tabanidae Attracted to Light1

It is not generally known that horseflies (Tabanidae) come rather freely to light. Slingerland (1902) mentioned a single unidentified species of Chrysops that came to a light trap. Philip (1931) reported collecting a few specimens at a street light. MacCreary (1940) was the first fully to realize the importance of light in obtaining Tabanidae. He took 10 species and 412 specimens at New Jersey light traps equipped with 25 watt lamps. These came to single traps located at four light houses in Delaware Bay. Among them were five species of Tabanus , one species of Leucotabanus and four species of Chrysops .

LATE CEREBRAL SEQUELAE OF RHEUMATIC FEVER

Until recently, rheumatic fever has been viewed as a disease taking place within a short period. The newer concepts, however, emphasize that the rheumatic infection may endure through the entire life of the patient. Mental symptoms during acute rheumatic fever have been observed since the days of Benjamin Rush, founder of American psychiatry.¹ Mental disease occurring within a period of several months following the acute stage, as the result of rheumatic cerebral involvement, has been described by Winkelman and Eckel.²A woman aged 33 had rheumatic fever. She recovered sufficiently to be able to do light house work. Several months later she began to have ideas of persecution, visual hallucinations and suicidal tendencies. When she died, shortly afterward, microscopic examination of the brain revealed proliferative endarteritis of the small cortical vessels and minute areas of partial and complete softening in the gray matter. More recent neuropathologic studies³

The Cultural Landscape of the Islands of the Inland Sea

1. Numerous islands scattering in “Setouchi” or inland sea present many facinating problems in terms of land utilization. 2. The necessity of providing cheap grass fertiliser to agricultural islands induces the utilization of many islands exclusively for the cultivation of grass. 3. The irregularity of roads pattern as well as the sectional limitation of the extension of roads are explained by the sectional isolation of the economic entity due to the irregular relief of the islands. 4. Small islands adjacent to the mother island have no permanent habitation provided the shortness of the distance enables the easy access by boat. 5. The lack and the existence of permanent habitation in small islands may be often explained by the relation of the seasonal demand of labor power. For while some of the islands that are exclusively utilized for paddy fields have no settlement, those for day farm have permanent dwellers without exceptien. 6. Most of the small islands are, contraty to the general expectation, primarily agricultural, and fishing is carried on merely as a subsidiary business. Thus the existence of arable land is the vital factor for the dwellers of the islands. 7. Farms are reached rather by boat than on foot. Thus each island has always some landing ports, although occassionally lacks in road. The farms are distributed in a most profused manner, as the location is mainly determined by the easy accessibility by boat. 8. Each island though uninhabited or without farm land, has a shrine without exception. “Benten” the sea goddess, is enshrined here. Shrines which are surrounded by sacred forests, are located at the tip of the promontries, whic, before the introudction of the light house, served as the important marks for the sea going vessels.

Mathematics and Sunshine

If the average man in the street were asked to name the benefits derived from sunshine, he would probably say “light and warmth” and there he would stop. But, if we analyze the matter a little more deeply, we will soon realize that sunshine is the one great source of all forms of life and activity on I his old planet of ours. To mention only a few particulars, wood, peat, coke, soft coal, anthracite, kerosene, fuel oil, gas, gasoline, are one and all forms of canoed sunshine in varying degrees of transformation. Hence I cannot stoke my furnace, turn on my oil-burner, step on the gasoline jn my automobile, cook my meals by wood, gas, oil or coal, light my house with kerosene or gas, without drawing upon the sunshine which was stored up for me in the form of carbon long ages ago in the deep recesses of the earth. All the industries of the world, great and small, all transportation by rail, water or air, are made possible only through the products of sunshine. Even the wind which drives my sailboat is only the rushing currents of sun-heated air.

Education for Maine's Light House Children

Education for Maine's Light House Children