scholarly journals Artificial sources of light used in photomedicine: history of discovery

Introduction. The history of the development of photomedicine over the past one and a half years is directly related to the history of the development of artificial light sources. And the medical direction of using these sources, as befits the light, has always been extremely bright. The purpose of this study was to familiarize doctors, scientists, engineers working in the field of photomedicine, with the creators of artificial sources of the light that is used for the rehabilitation, diagnosis, treatment and prevention of the most common human diseases. Materials and methods. Sources of information were archival documents of scientific libraries, scientific journals, and conference proceedings. The search depth was almost 160 years. Results. As a result of this work, the names of three outstanding inventors of the first incandescent lamps born in the same 1847 and giving people artificial sun were mentioned again (Russian engineer Alexander Nikolaevich Lodygin, Russian military engineer Pavel Nikolaevich Yablochkov and American electrical engineer Thomas Alva Edison) . The work of the first arc lamps was based on research by the Russian inventor V.V. Petrov and the English naturalist G.Devi. As a result of complex experiments, the Russian physicist S.I. Vavilov discovered in 1924 that the efficiency of luminescent substances is much higher than the efficiency of incandescent lamps. The Nobel laureates of 1964 for fundamental work in the field of quantum electronics, which led to the creation of generators and amplifiers of a new type - masers and lasers, became the American physicist C. Townes and Soviet physicists N.G. Basov and A.M. Prokhorov. In 1960, the laser era began with the light arm of Theodor Harold Meiman, who created the first ruby-crystal laser operating at a wavelength of 694.3 nm. Then A. Javan, W. Bennet and D. Herriot created a gas (helium-neon) laser. In 1962, a semiconductor laser was created by a group of American (B.Lex, U. Dumke, M.Naten) and independently Soviet scientists (B.M. Vul and others). A carbon dioxide laser (molecular) was created in 1964 by K. Patel. A dye laser was created in 1966 by P. Sorokin and J. Lancard. The “father” of LEDs is considered by the whole world to Nick Holonyak, who in 1962 created the world’s first GaAsP luminescent diode emitting in the red spectrum. Findings. In the process of evolution of artificial light sources (from incandescent lamps, fluorescent lamps to lasers and LEDs), phototherapy methods were also improved.

Author(s):  
A. V. Spichak

The study addresses some aspects of the life experience of female prosphora bakers from the clergy in the Tobolsk diocese, Russian Empire, in the 19th and early 20th century. The research objectives were to investigate opportunities and difficulties that women faced trying to get the job of a prosphora baker, and to find out reasons why women would seek this position. The sources of information for the research were previously unexamined archival documents preserved in the State Archives in Tobolsk. General scientific, historical and special methods of records management were also used. The main problem for jobseekers was the fact that one parish most often required only one prosphora maker, and there were usually more people willing to take this position. It was up to the diocesan authorities to decide which candidate needed the job more, but the parishioners could also take part in the hiring process by submitting their letter of consent. In the modern period of Russian Orthodox Churchs resurgence, it is especially important to study how the clergy would manage their daily living needs in dioceses. The positive experience of the past can help improve the system of social relief in our time. The results of the research can be useful to archivists in their professional activities and to educators in developing courses on the history of Russia and records management.


HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 507A-507
Author(s):  
Dong-Lim Yoo ◽  
Seung-Woo Lee

This experiment was conducted to investigate the effects of artificial light sources for light period extension on growth and flowering of statice `Sophia' and `Early Blue'. The seeds were sown on 10 June in a plug tray with 128 plugs. The seedlings were grown at the highland (800 m above sea level) for 50 days, and transplanted on 30 July in 20-cm-diameter plastic pots. High-pressure sodium lamps (HPS) (220V, 400W), incandescent lamps (Il) (220V, 200W), and fluorescent lamps (Fl) (220V, 40W) for day length extension (16-h photoperiod) as compared with short day (8-h photoperiod) were tested. HPS gave the greatest photosynthetically active radiation (PAR), but Fl did the smallest. HPS or Fl as compared with Il showed high ratio of red/far-red light. The leaves of plant grown under HPS were effective for light absorbance and chlorophyll contents. HPS promoted photosynthesis as much as light period extension, while more respiration than photosynthesis occurred under Fl affected by low PAR. Long day condition as light period extension hastened flowering of statice, and HPS or Il were more effective than Fl on flowering among artificial light sources tested. The light compensation and saturation points of statice were 50 and 500 μmol·m–2·s–1, respectively. Photosynthesis hastened at high temperature, but amount of photosynthesis at vegetative stage showed much higher than flowering stage under the condition below 20 °C These results indicated that day length extension with HPS increased productivity and quality for cut flower of statice at the highland in Korea.


2018 ◽  
pp. 245-259
Author(s):  
Grigory N. Lanskoy ◽  

The information on the last plenary meeting of the All-Russian public organization ‘Russian Society of Historians and Archivists’ (ROIA) includes report and official documentation. The report and discussion of the ROIA plenary meeting participants remarked that the events of interest are in complete congruence with the profile of the ROIA activities as a non-profit-making organization, active on both federal level and on the level of its regional offices in over 70 subjects of the Russian Federation. Of particular importance are interactions of the ROIA with the Federal Archival Agency and regional directorates for archiving and their subordinate institutions. Methodological focus of the ROIA projects is connected with tasks of identification, summation, introduction into scientific use, and popularization of archival documents on the Russian history. The ROIA activities ascertain results and prospects of new documents (especially, those of personal provenance) acquisition in the state archives and bring little-known documents to light. The ROIA gave coverage to results of work on the project ‘Revolution of 1917 in archival documents.’ Together with the Russian Military Historical Society and Association of Scholars in Soviet Society and Contemporary History, it participated in the contest of research and creative work ‘Russia: The memory space: The 20th century.’ To support the scientific research and educational project ‘Historical document heritage on the history of the Republic of Crimes and Sebastopol,’ a presidential grant was obtained. The ROIA seeks cooperation of the National Association of Russian Border Troops Veterans. The ROIA was one of the winners in the 2nd Grant Contest of the ‘History of the Motherland’ foundation with its exhibition project ‘Revolution of 1917 in the Moscow streets: Documents and photographs.’


2018 ◽  
pp. 97-130
Author(s):  
Denzenlkham Ulambayar

Since the 1990s, when previously classified and top secret Russian archival documents on the Korean War became open and accessible, it has become clear for post-communist countries that Kim Il Sung, Stalin and Mao Zedong were the primary organizers of the war. It is now equally certain that tensions arising from Soviet and American struggle generated the origins of the Korean War, namely the Soviet Union’s occupation of the northern half of the Korean peninsula and the United States’ occupation of the southern half to the 38th parallel after 1945 as well as the emerging bipolar world order of international relations and Cold War. Newly available Russian archival documents produced much in the way of new energies and opportunities for international study and research into the Korean War.2 However, within this research few documents connected to Mongolia have so far been found, and little specific research has yet been done regarding why and how Mongolia participated in the Korean War. At the same time, it is becoming today more evident that both Soviet guidance and U.S. information reports (evaluated and unevaluated) regarding Mongolia were far different from the situation and developments of that period. New examples of this tendency are documents declassified in the early 2000s and released publicly from the American Central Intelligence Agency (CIA) in December 2016 which contain inaccurate information. The original, uncorrupted sources about why, how and to what degree the Mongolian People’s Republic (MPR) became a participant in the Korean War are in fact in documents held within the Mongolian Central Archives of Foreign Affairs. These archives contain multiple documents in relation to North Korea. Prior to the 1990s Mongolian scholars Dr. B. Lkhamsuren,3 Dr. B. Ligden,4 Dr. Sh. Sandag,5 junior scholar J. Sukhee,6 and A. A. Osipov7 mention briefly in their writings the history of relations between the MPR and the DPRK during the Korean War. Since the 1990s the Korean War has also briefly been touched upon in the writings of B. Lkhamsuren,8 D. Ulambayar (the author of this paper),9 Ts. Batbayar,10 J. Battur,11 K. Demberel,12 Balảzs Szalontai,13 Sergey Radchenko14 and Li Narangoa.15 There have also been significant collections of documents about the two countries and a collection of memoirs published in 200716 and 2008.17 The author intends within this paper to discuss particularly about why, how and to what degree Mongolia participated in the Korean War, the rumors and realities of the war and its consequences for the MPR’s membership in the United Nations. The MPR was the second socialist country following the Soviet Union (the Union of the Soviet Socialist Republics) to recognize the DPRK (Democratic People’s Republic of Korea) and establish diplomatic ties. That was part of the initial stage of socialist system formation comprising the Soviet Union, nations in Eastern Europe, the MPR, the PRC (People’s Republic of China) and the DPRK. Accordingly between the MPR and the DPRK fraternal friendship and a framework of cooperation based on the principles of proletarian and socialist internationalism had been developed.18 In light of and as part of this framework, The Korean War has left its deep traces in the history of the MPR’s external diplomatic environment and state sovereignty


2004 ◽  
Vol 2 (2) ◽  
pp. 188-197 ◽  
Author(s):  
Nur Masalha

In 1948 an official ‘Transfer Committee’ was appointed by the Israeli Cabinet to plan the Palestinian refugees' resettlement in the Arab states. Apart from doing everything possible to reduce the Arab population in Israel, the Transfer Committee sought to amplify and consolidate the demographic transformation of Palestine by: preventing the Palestinian refugees from returning to their homes; the destruction of Arab villages; settlement of Jews in Arab villages and towns; and launching a propaganda campaign to discourage Arab return. One of the Transfer Committee's initiatives was to invite Dr Joseph Schechtman, a right-wing Zionist Revisionist leader and expert on ‘population transfer’, to join its efforts. In 1952 Schechtman published a propagandists work entitled The Arab Refugee Problem. Since then Schechtman would become the single most influential propagator of the Zionist myth of ‘voluntary’ exodus in 1948. This article examines the leading role played by Schechtman in promoting Israeli propaganda and politics of denial. Relying on newly-discovered Israeli archival documents, the article deals with little known and new aspects of the secret history of the post-1948 period.


Author(s):  
Tembinkosi Bonakele ◽  
Dave Beaty ◽  
Fathima Rasool ◽  
Drikus Kriek

The recent entry of the US multinational Walmart into South Africa has proved to be a source of controversy. Key stakeholders in South Africa objected to the merger and attempted to block it unless certain conditions were met. The aim of this study was to examine the controversy and the conditions surrounding the merger. The research employed a qualitative archival analysis to examine publicly available sources of information with regard to the merger. The findings revealed key stakeholders’ concerns that Walmart’s entry would lead to an increase in imports which would displace local producers, increase unemployment, marginalise trade unions and lower labour standards unless certain conditions were met. The results also revealed problems relating to the firm’s primary focus on “business” while neglecting “public interest” issues, naively relying on their “local retailer” to manage key stakeholders, and assuming that their perceived controversial reputation regarding treatment of trade unions and their views about unemployment as well as the controversies surrounding their history of entry into other global markets would not have the major negative impact it did on stakeholders in South Africa.


2020 ◽  
Vol 3 (3) ◽  
pp. 63-67
Author(s):  
Mamarazok Tagaev ◽  

In the article, after the conquest of the Russian Empire in the province, hospitals were opened for the Russian military and turned them into a hospital. Opened hospitals in Tashkent, Samarkand and Kattakurgan and outpatients for women and men. However,the local population, fearing doctors in uniform, did not want to contact them and turned to healers and paramedics


2018 ◽  
pp. 1254-1265
Author(s):  
Vitaly G. Ananiev ◽  

The article is devoted to the work Alexander S. Nikolaev (1877 – 1934) in the Petrograd Institute of Out-of-School Education in late 1910s – early 1920s. His teaching activities at the Institute and the place of archival issues in the program of its museum department have been studied on the basis of archival documents. The Institute initially focused on training of instructors and employees of cultural institutions, school teachers for adults and universities professors. The Institute had a museum section (department – faculty), on the basis of which several exemplary workshops for creating of manuals and their mastering were to be organized. That is the context in which A. S. Nikolaev’s projects of archival museum creation should be studied. One of such projects worked out by Nikolaev at that time has gone unnoticed until its publication in the Appendix. The connection of this project with the development level of museum affairs of the period is shown. Nikolaev's aspiration to show evolution of archiving and to follow fond formation stage by stage and his use of photographic and graphic materials are also noted. Moreover, it is the first assessment of the work of the Institute as one of the centers for teaching archiving in late 1910s – early 1920s.Training at the museum department of the Institute included a number of courses in both archiving and preservation of documentary monuments. This was due not only to the traditional proximity of archiving and museum work, but also to the circumstances of the first post-revolutionary years. Many museums (located in palaces and mansions of nobility) acquired valuable archival collections. They looked for an opportunity to use these in their scientific activities and exhibitions. The latter was due to the emphasis put on history of daily life and introduction of sociological method in museum work.


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