12 research outputs found
CO2 λ μ΄μ μ‘°μ¬μ λ°λ₯Έ μΉμκ°λ΄ μ¨λλ³νμ κ΄ν μ€νμ μ°κ΅¬
μΉμνκ³Ό/λ°μ¬[μλ¬Έ]
[νκΈ]
λ μ΄μ κ° μΉμμ μ‘°μ¬λλ©΄ λ²λμ§μμ ν‘μλμ΄ μ΄μ΄ λ°μλκ³ , κ·Έ μ΄μ μν΄μ κ²½μ‘°μ§
μ ꡬλ©μ΄ μκΈ΄λ€. μ΄λ νμ±λλ μ¨λκ° μΉμ§ λ° μΉμμ μ΄μμ μ£Όμ§μλ λ²μλΌλ©΄ λ μ΄
μ λ₯Ό μΉκ³Όλ³΄μ‘΄μΉλ£μ μ¬μ©ν μ μλ€.
μ μλ μΉμλ³λ³μ μΌμΌν€μ§ μκ³ μΉκ³Όλ³΄μ‘΄μΉλ£μ νμ©κ°λ₯ν λ μ΄μ μλμ§μ λΆκ°μ
μΌλ‘ μ¨λλ₯Ό νκ°μν€λ λ°©λ²μ μ μνκΈ° μνμ¬ μΆλ ₯ 6W, λ μ΄μ λΉ κ²½ 1.5mmμΈ μ§μνCO
^^2 λ μ΄μ λ₯Ό μ΄μ 거리 200mmμΈ Geλ μ¦λ‘ 0.2mmβΌ03mmμ λλ‘ μ μνμ¬ 2,4,8,16μ΄ λμ
λ°κ±°λ νμ
λκ΅¬μΉ κ΅ν©λ©΄ μ€μμ μ‘°μ¬νμμΌλ©°, κ°μ μλμ§μ λν΄μλ λ³νλ₯Ό μ£ΌκΈ° μ
νμ¬ κ³μμ‘°μ¬ν κ²½μ°, λΆν μ‘°μ¬ν κ²½μ°, κ³μμ‘°μ¬ ν λ¬Όλ‘ λκ°μν¨ κ²½μ°λ‘ κ΅¬λΆ μ‘°μ¬ν
μ¬ κ·Έμ λ°λ₯Έ μΉμκ°λ΄ μ¨λλ₯Ό μΈ‘μ λ€μκ³Ό κ°μ κ²°κ³Όλ₯Ό μ»μλ€.
1. μΉμκ°λ΄ μ¨λμμΉμ λ μ΄μ λ₯Ό μΌμ μκ° κ³μμ‘°μ¬ν κ²½μ°, λΆν μ‘°μ¬ν κ²½μ°, κ³μμ‘°
μ¬ ν λ¬Όλ‘ λκ°μν¨ κ²½μ°μ μμΌλ‘ λκ² λνλ¬λ€.
2. λ μ΄μ λ₯Ό μΌμ μκ° κ³μμ‘°μ¬ν κ²½μ° 2μ΄ μ‘°μ¬μλ 1.7β, 4μ΄μ 3.8β, 8μ΄μ 7.3β
, 16μ΄μ 17.2βλ‘ μΉμκ°λ΄ μ¨λκ° μμΉνμκ³ , λΆν μ‘°μ¬ν κ²½μ°μλ κ°κ° 1.2β, 3.4β
, 6.3β, 11.1β, κ³μμ‘°μ¬ ν λ¬Όλ‘ λκ°μν¨ κ²½μ°μλ κ°κ° 0.0β, 0.8β, 1.6β, 6.9β
μ μΉμκ°λ΄ μ¨λμμΉμ΄ μμλ€.
3. λ μ΄μ μ‘°μ¬κΈ°κ°μ κ΄κ³μμ΄ μΉμκ°λ΄ μ¨λμμΉ μμμκ°μ μΌμ νμλ€.
AN EXPERIMENTAL STUDUY ON THE TEMPERATURE CHANGE OF THE PULP CHAMBER INDECED BY THE
CO^^2 LASER IRRADIATION.
Jong Man Lee, D.D.S.,M.S.D.
Department of Dental Medicine, The Graduate School, Yonsei University
(Directed by Professor Chung Suck Lee, D.D.S.,Ph.D.)
The purpose of the study was to suggest the use of laser energy in the the field
of operative dentistry without considerable pupal damage and significant effects on
the dental hard tissue, additionally fo find out the methods which could control
the temperature rise.
The laser bean (CW CO^^2 laser, output: 6W, beam diamethe: 1.5mm) was focused on
the center of the occlusal surface of extracted lower molars. A Gelens (focal
length 200mm) was used to focus the primary laser beam.
In order to vary the total amount of the same irradiated energy, experimental
subjects were devided into three groups: continuously irradiated group,
intermittently irradiated group, and water-cooled group after continuous laser
irradiation. Temperature changes in the pulp chamber after laser irradiation were
measured and recored by the digital thermometer and recorder.
The following results were obtained:
1. Temperatures in the pulp chamber were raised up in the order of the
continuously irradiated group, intermittently irradiated group, water-cooled group
after continuous laser irradiation.
2. In the continuously irradiated group, the temperature was raised up 1.7β, ,
3.8β, 7.3β, 17.2β, after 2. 4. 8. 16 seconds of the irradiation of laser.
In the intermittently irradiated group, the changes were 1.2β, 3.4β, 6.3β,
11.1β, respectively.
In the water-cooled group after continuous laser irradiation, the changes were
0.0β, 0.8β, 1.6β, 6.9β, respectively.
3. The starting time of temperature rise in the pulp chamber had no connection
with laser irradiation time.restrictio
(A) clinical study on root canal treated patients
μΉμνκ³Ό/μμ¬[νκΈ]
μ μλ 1976λ
1μλΆν° 1978λ
12μκΉμ§ μ°μΈλνκ΅ μΉκ³Όλν λΆμλ³μμ λ΄μν 17,250λͺ
νμ κ°μ΄λ° κ·Όκ΄μΉλ£λ₯Ό λ°μ νμ 728λͺ
μ€ 660λͺ
773κ° μΉμλ₯Ό λμμΌλ‘ μ±λ³, μ°λ Ήλ³, μ§νλ³, λΆμλ³μ λ°λ₯΄λ κ·Όκ΄μΉλ£ νμμ μ€νμ κ·Έμ λ°λ₯Έ λ΄μνμλ₯Ό μ‘°μ¬νμ¬
λ€μκ³Ό κ°μ κ²°λ‘ μ μ»μλ€.
λ΄μνμλ₯Ό 보면
1. μμ
μ΄ 5.95ν, νμ
μ 5.88νμ΄μλ€.
2. μ±λ³λ‘λ λ¨μκ° 5.79ν, μ¬μκ° 6.02νμ΄μλ€.
3. μ°λ Ήλ³λ‘λ 55μΈ μ΄μμ μ μΈνκ³ μμ
μ΄ νμ
λ³΄λ€ λ§μμΌλ©°, 14μΈ μ΄νμμ μμ
7.42ν νμ
6.76νλ‘ κ°μ₯ λ§μλ€.
4. μ§νλ³λ‘ μΉκ·Όλ¨λμμ΄ μμ
μμ 6.34ν, νμ
μ΄ 6.14ν, μΉκ·Όλ¨μ‘μμ€ λ° μΉκ·Όλ¨ λμ’
μ μμ
μμ 2.80ν νμ
μ΄ 3.16νλ‘ λνλ¬λ€.
μ‘°μ¬μΉμμλ₯Ό 보면
5. μμ
4μ μΉ 27.94%, νμ
λκ΅¬μΉ 25.87%, μμ
λκ΅¬μΉ 15.13%μμ΄μλ€.
6. μ§νλ³λ‘ μΉκ·Όλ¨λμμ΄ 45.27%, μΉμμΌ 37.51%, μΉμνμ 8.40%μμ΄μλ€.
7. 20~34μΈκ° μ 체μ 51.99%λ₯Ό μ°¨μ§νμλ€.
[μλ¬Έ]
In order to observe the frequency of visits and the distribution of ecdodontically treated parients according to age, sex, diagnosis, type of teeth, the author had surveyed the 17,250 outpatients of the Infirmary of the College Dentistry, Yonsei University from January 1976 to December 1978.
773 cases, 660 patients among 728 endodontically treated patients were studied.
The obtained results were as follow;
1. The average frequency of visits were 5.95 in uppers and 5.88 in lowers.
2. The average frequency of visits were 5.79 in males and 6.02 in females.
3. At the age of under 14, the average frequency of visits were 7.42 in uppers and 6.76 in lowers.
4. According to diagnoses, the average frequency of visits in periapical granuloma or cyst were 2.80 in uppers and 3.16 in lowers.
5. The number of endodontically treated teeth had revealed as follow; upper incisors 27.94%, lower molars 25.87%, and upper molars 15.13%
6. The number of endodontically treated teeth by diagnoses were as follow;
periapical abscess 45.27%, pulpit is 37.51%, tooth fracture 8.40%.
7. The number of endodontically treated teeth were 51.99% in the age of from 20 to 34.restrictio
Energy-efficient Video Streaming System with TCP/UDP over Heterogeneous Wireless Networks
λ³Έ μ°κ΅¬μμλ μ΄μ’
무μ λ€νΈμν¬μμ TCP/UDPλ₯Ό ν΅ν μλμ§ ν¨μ¨μ μΈ HTTP μ μμ μ€νΈλ¦¬λ°μ μ μνλ€. μ μνλ μμ€ν
μ κΈ°μ‘΄ HTTP μ μμ μ€νΈλ¦¬λ° μμ€ν
κ³Ό λ€λ₯΄κ² μ μλ μμ€ν
μ TCP λ° UDPλ₯Ό λͺ¨λ μ¬μ©νμ¬ λ€νΈμν¬ μνμ λ°λ₯Έ TCPμ μ±λ₯ μ ν λ¬Έμ λ₯Ό ν΄κ²°νκ³ μλμ§ ν¨μ¨μ±μ ν₯μμν¨λ€. μ μλ μμ€ν
μ μ΄λ λ¨λ§μ λ€νΈμν¬ μ‘°κ±΄, λ²νΌ μ μ λ° μλμ§ ν¨μ¨μ κ³ λ €νμ¬ μ μ‘ νλ‘ν μ½μ μ’
λ₯, μμ²λ λΉλμ€ νμ§ λ° κ° λ¬΄μ λ€νΈμν¬λ₯Ό ν΅ν΄ μμ λλ λ°μ΄ν°μ μμ κ²°μ νλ€. μ μ‘ νλ‘ν μ½λ‘ UDPκ° μ ν μ, μ λ’°μ± μλ λ°μ΄ν° μ μ‘ λ³΄μ₯νκΈ° μν΄ λ©ν° μ½λλ₯Ό μ μ©νμμΌλ©°, μλμ§ ν¨μ¨μ μ μ‘μ μν΄ μ¬λ³Ό ν¬κΈ° λ° μ€λ³΅ λ°μ΄ν°μκ³Ό κ°μ λ©ν° λ§€κ° λ³μλ₯Ό μ μμ μΌλ‘ λ³κ²½νλ€. μ μλ μμ€ν
μ μλλ‘μ΄λ κΈ°λ° λ¨λ§μμ ꡬνλμμΌλ©°, μ€μ WiFi λ° LTE λ€νΈμν¬μμ μ μλ μμ€ν
μ΄ μλμ§ ν¨μ¨μ μ΄λ©°, κ³ νμ§μ μ€νΈλ¦¬λ° μλΉμ€λ₯Ό μ 곡ν μ μμμ κ²μ¦νμλ€.22Nkc