Journal articles on the topic 'Thomas Alva Edison'

Thomas Edison's achievements as an inventor-entrepreneur tend to overshadow the fact that his knowledge and interests extended well beyond the applied sciences. In 1891, a crucial and busy year of his life, Edison took time to set forth his views on one of the most important issues of the day, government regulation of business. Edison's notebook remained almost untouched for nearly one hundred years until Professor Rubin began a careful examination of its contents. His editing and annotation of the manuscript reveal the considerable depth of Edison's intellect and his capacity to probe economic issues in the same thorough manner with which he approached research problems in the laboratory.

Over the past one hundred years, the phrase ―Insomnia Squad‖ has evolved from an inside joke among a few of Thomas Edison‘s laboratory staffers into a term of popular culture, familiar even to school children. Yet very little has been written about the seven experimenters who constituted the task force that Edison assembled in September 1912, why the inventor chose these particular individuals to assist him, the nature of the problem with which he was grappling, or how it was ultimately resolved. Edison and his assistants worked night and day for five weeks with only a minimal amount of sleep, yet no adequate explanation has been offered as to why the inventor drove his men so hard. This article, based on the documents in the microfilm and digital editions of the Thomas A. Edison Papers, reveals that this period of intense activity coincided with a family crisis, as Edison‘s wife Mina rushed to Akron, Ohio, to tend to her dying mother, while her inventor husband raced to perfect the Diamond Disc record before he was called away to attend the funeral. With a million dollars worth of phonographs piled up in the warehouse and no records to sell along with them, Edison and his men pushed round the clock to work out the bugs in the manufacturing process and bring the Diamond Disc to market. Although seven experimenters assisted Edison, only six appear in the group photograph that was taken at the end of the marathon session. The identity of the seventh ―Insomniac‖ is revealed at the end of the article.

Thomas Alva Edison, el más grande inventor, cambió la vida de la gente en todos los lugares del mundo con inventos tales como la luz eléctrica y el fonógrafo. Patentó 1,093 inventos de su creación y mejoró los inventos de muchas otras personas, tales como el teléfono, la máquina de escribir, el generador eléctrico y las imágenes en movimiento. Quizás lo más importante de todo, es que fue el primero en organizar la investigación.

The invention of sound recording technology in the nineteenth century was a modern miracle. Making possible the storage and preservation of sounds across time and distance, which previously could only be dreamed of, this invention contributed significantly to the developing entertainment world. Thomas Alva Edison first realized this dream in 1877 when he invented the tin-foil phonograph, which then inspired other scientists to perfect and develop his invention. During the last two decades of the 1800s sound recording machines were exhibited outside the United States of America, first in Europe and then in Australia and Asia. In Europe the machine was first demonstrated at the Academy of Science in Paris on 11 March 1878, where a French professor named Bonjour accused Edison of cheating. He stated that Edison was a ventriloquist.

La crónica que Martí dedica a Thomas Alva Edison, publicada en El Partido Liberal el 5 de febrero de 1890 perteneciente a uno de los tomos de la Edición Crítica, en fase de investigación y cotejada en microfilme, nos permite apreciar la originalidad del científico y el hombre. Al analizar la imagen que construye Martí de Edison, llama la atención la relación que establece el genial inventor entre sus creaciones, lo natural y el misterio, pues el hombre de ciencia tiene también visiones místicas y fantasías, de ahí que haya una vinculación entre Dios con la ciencia, así como entre la poesía y las ciencias, en especial las matemáticas. El presente artículo analiza estas relaciones.

distribuição de energia teve seu início no último quartil do século passado, podendo ser considerada como um marco a construção, por Thomas Alva Edison, em 1879, da primeira central elétrica para distribuição de energia à cidade de Nova Iorque. No Brasil, o pioneirismo coube à cidade de Campos, que, em 1883, tornousea primeira da América do Sul a receber iluminação pública elétrica. A distribuição elétrica, en tretanto, somente veio a constituir-se em um serviço público relativamente amplo a partir da primeira década do século, inicialmente em São Paulo (1899) e, posteriormente, no Rio (1905).

Lights are essential for humans and other living creatures. Without lights or lighting, surely it will be hard to do everything, especially in the afternoon or at night. As the development of civilization and technology, humans created artificial lighting. For the first time, it was only a substitute for natural light from the sun. Artificial light was provided from the fire; then research and development of the light bulb were conducted by Alessandro Volta, Sir Humphry Davy, Warren De La Rue, to Thomas Alva Edison. After the natural lights from the sun can be replaced by artificial lighting from the lamp, the development of lighting is getting much complex ranging from technical to psychological things. This relates to the increasing human activity in the room. The diversity of different activity requires different types of lighting methods. The development results not only about technical and psychological problems but also aesthetic elements.

Durante el porfiriato, la sociedad mexicana vivió una época de revoluciones tecnológicas que modificaron las formas de percibir el tiempo, la distancia y los sonidos. Uno de estos inventos fue el fonógrafo, creado por Thomas Alva Edison en 1877. Los usos sociales y culturales de las máquinas parlantes en el país incluyeron los más diversos rubros, desde la renta ambulante hasta la firma de contratos para trasformar el servicio de correos. Si bien los hombres tuvieron un papel protagónico en esta historia sonora, las mujeres porfirianas no fueron relegadas a un papel secundario de meras consumidoras domésticas de los aparatos. Mediante un examen de fotografías, diarios y peticiones gubernamentales, en este artículo muestro cómo, durante los días de la revolución eléctrica, las mexicanas también participaron en los procesos de grabación y comercialización de los fonogramas y los aparatos reproductores. Primero, abordo los casos de dos relevantes cantantes que lograron grabar sus voces en diferentes formatos, la soprano Ángela Peralta y la tiple Esperanza Iris. Después, documento las prácticas y las experiencias de las comerciantes que rentaron fonógrafos en las calles o los colocaron en sus negocios para atraer a clientes. El ensayo abre las puertas a una nueva historia de la relación entre las mujeres y las tecnologías acústicas en México, a la vez planteando preguntas y temas para investigaciones en otros países en América Latina.

Keamanan makanan adalah kondisi dan upaya yang diperlukan untuk mencegah pangan dari kemungkinan cemaran biologis,kimia dan benda lain yang dapat mengganggu, merugikan dan membahayakan kesehatan manusia serta tidak bertentangan dengan agama,keyakinan dan budaya masyarakat sehingga aman untuk dikonsumsi. Bahan Tambahan Pangan (BTP) adalah bahan yang ditambahkan ke dalam pangan untuk mempengaruhi sifat atau bentuk pangan. Metode penelitiannya adalah penelitian eksperimental yang dilakukan di laboratorium yaitu untuk menganalisa zat berbahaya Boraks dan Rhodamin B pada jajanan bakso bakar dengan menggunakan uji nyala dan kromatografi. Objek penelitian dalam penelitian ini adalah bakso bakar yang dijajakan pedagang dibeberapa sekolah dasar di Kecamatan Medan yaitu SD Swasta Thomas Alva Edison, SD Swasta Islam Terpadu Hikmatul Fadhillah, MIS Al-Ikhlashiyah, MIS Al-Marwa, SDN 060912, SDN 060909, SDN 065853, SDN 066053, SDN 067241, SD Swasta Al Hira. Hasil penelitian menemukan ada tiga sampel bakso bakar yang diperiksa mengandung Boraks yaitu sampel C, F, G dan empat sampel saos pada bakso bakar yang diperiksa mengandung Rhodamin B yaitu sampel A, B, D, E. Ditemukan tiga pedagang yang memakai Boraks dan empat pedagang yang memakai Rhodamin B pada dagangan jajanan bakso bakar yang dijual dibeberapa sekolah dasar di Kecamatan Medan Denai. Perlu dikembangkan upaya pendidikan bagi konsumen/masyarakat dan pedagang tentang bahaya konsumsi melalui iklan layanan masyarakat. Begitu juga Balai POM agar tetap melaksanakan pemantauan dan pengawasan terhadap pemakaian Boraks dan Rhodamin B pada makanan sebagai bahan tambahan makanan.

Penelitian eksperimen ini bertujuan untuk mengetahui pengaruh model pembelajaran interaktif setting kooperatif dalam pembelajaran matematika siswa kelas X MIA SMA Negeri 2 Pangkajene Tahun Ajaran 2016/2017. Unit eksperimen dalam penelitian ini adalah siswa kelas X MIA Thomas Alfa Edison sebagai kelas perlakuan dan kelas X MIA Ki Hajar Dewantara sebagai kelas kontrol. Unit eksperimen diambil secara random sampling 2 kelas dengan jumlah responden kelas perlakuan sebanyak 27 orang siswa dan kelas kontrol sebanyak 28 orang siswa. Pengambilan data dilakukan melalui tes kemampuan awal siswa, tes hasil belajar matematika siswa, kuesioner minat belajar siswa, dan lembar keterlaksanaan model pembelajaran yang digunakan. Data yang diperoleh diolah dengan menggunakan bantuan program pengolahan data statistik SPSS 20.0. Hasil analisis statistik menunjukkan bahwa hasil belajar matematika siswa kelas X MIA Thomas Alfa Edison SMA Negeri 2 Pangkajene yang diajar dengan menggunakan model pembelajaran interaktif setting kooperatif dikategorikan sedang dengan skor rata-rata 80,52 dengan standar deviasi 9,901 dari skor ideal 100. Minat belajar siswa dikategorikan tinggi dengan skor rata-rata sebesar 147,3 dari skor ideal maksimum 200. Sedangkan lembar keterlaksanaan model pembelajaran siswa dikategorikan terlaksana dengan sangat baik dengan skor rata-rata 3,858. Sedangkan hasil analisis statistik menunjukkan bahwa hasil belajar matematika siswa kelas X MIA Ki Hajar Dewantara SMA Negeri 2 Pangkajene yang diajar dengan menggunakan model pembelajaran konvensional dikategorikan sedang dengan skor rata-rata 68,68 dengan standar deviasi 12 dari skor ideal 100. Minat belajar siswa dikategorikan tinggi dengan skor rata-rata sebesar 141,14 dari skor ideal maksimum 200. Sedangkan lembar keterlaksanaan model pembelajaran siswa dikategorikan terlaksana dengan sangat baik dengan skor rata-rata 3,68. Hasil analisis inferensial terhadap skor kemampuan matematika siswa kelas X MIA Thomas Alfa Edison SMA Negeri 2 Pangkajene yang diajar dengan menggunakan model pembelajaran interaktif setting kooperatif menunjukkan bahwa terdapat pengaruh penerapan model pembelajaran interaktif setting kooperatif dengan memperhatikan minat belajar dan kemampuan awal siswa. Hal tersebut dilihat dari Tabel Hasil Analisis Uji Analisis Kovarians. Dari output Tabel Hasil Analisis Uji Analisis Kovarians diperoleh Sig Corrected Model = 0,000. Nilai p-value lebih kecil dari α (0,05) yang berarti H_0 ditolak atau H_1 diterima. Dengan kata lain dapat disimpulkan bahwa terdapat pengaruh penerapan model pembelajaran interaktif setting kooperatif dengan memperhatikan minat belajar dan kemampuan awal siswa. Kata Kunci. Model Interaktif, Minat Belajar, Kemampuan Awal, Hasil Belajar Abstract This experimental study aimed to determine the effect of learning model interactive cooperative settings in mathematics class X SMA Negeri 2 Pangkajene MIA T ear A distance 201 6 /201 7 . The experimental unit in this study was MIA class X Thomas Alfa Edison as the treatment class and MIA Ki Hajar Dewantara class X as the control class. The experimental unit was taken by random sampling 2 classes with the number of respondents in the treatment class as many as students and the control class as many as 28 students .Data collection was carried out through students' initial ability tests, student mathematics learning achievement tests, student interest questionnaires, and the feasibility sheet of the learning model used. The data obtained were processed using the help of SPSS 20.0 statistical data processing program . The results of statistical analysis show that the mathematics learning outcomes of X MIA Thomas Alfa Edison students at SMA Negeri 2 Pangkajene who are taught using the cooperative learning interactive learning model are categorized as moderate with an average score of 80.52 with a standard deviation of 9.901 from an ideal score of 100. Student learning interests categorized high with an average score of 147.3 from the maximum ideal score of 200. While the sheet of implementation of the learning model of students is categorized very well done with an average score of 3.858. While the results of statistical analysis show that the learning outcomes of students of class X MIA Ki Hajar Dewantara of SMA Negeri 2 Pangkajene taught using conventional learning models are categorized as moderate with an average score of 68.68 with a standard deviation of 12 from an ideal score of 100. Student learning interest is categorized high with an average score of 141.14 from the maximum ideal score of 200. While the sheet of feasibility of the student learning model is categorized to be implemented very well with an average score of 3.68. The results of the inferential analysis of the mathematics ability scores of class X MIA Thomas Alfa Edison Public High School 2 Pangkajene who were taught using the cooperative learning interactive learning model showed that there was an influence on the application of the interactive learning cooperative cooperative model by paying attention to students' learning interests and initial abilities. This can be seen from the Analysis Results Table for Analysis of Covariance Analysis. From the output of the Analysis Result Test Table, the Covariance Analysis was obtained by the Sig Corrected Model . A value of less than (0.05) which means it is rejected or accepted. In other words it can be concluded that there is an influence on the application of interactive learning models in cooperative settings by paying attention to students' learning interests and initial abilities.

Este escrito se refiere a la producción cinematográfica de Thomas Alva Edison y su relación con México. En este año se celebra el primer siglo del cine en el mundo, y esta información facilita una nueva tentativa de respuesta al viejo problema de los orígenes de este espectáculo, en particular su llegada y diseminación por nuestro país. Se ofrece un catálogo completo de las fichas filmográficas disponibles hasta la fecha, de lo producido por la Compañía Edison para el kinetoscopio, el vitascopio y el esteropticón —aparatos de esa firma que se explotaron en las primeras salas de cine nacionales— con temas pretendidamente mexicanos, o de las cintas filmadas efectivamente por agentes de Edison en México entre 1897 y los primeros años de este siglo. Además se ofrecen datos que ayudan a poner en su contexto la información ofrecida.

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.