Ancient Use of Mirrors in Warfare The famous ancient Greek mathematician Archimedes reportedly used large concave mirrors during the war with Rome. By arranging six large concave mirrors in a circular pattern, he focused sunlight onto Roman ships, setting them on fire and securing victory. This is an example of using the principles of mirrors […]
Understanding the Principle of Mirrors to See ‘Safety’ 더 읽기"
▣ Types of Lights We Use Fluorescent lamps are light bulbs that contain mercury sealed in a vacuum glass tube, with the inner walls coated with phosphorescent material. They emit bright white light by producing ultraviolet rays from mercury discharge, which then react with the phosphorescent material to produce visible light. Recently, in addition to
Dangerous broken fluorescent lamp 더 읽기"
▣ 우리가 사용하는 전등의 종류 ‘형광등’은 진공 유리관에 수은을 봉입하고 그 내벽에 형광물질을 바른 전등입니다. 형광등은 흰색의 밝은 빛을 내며, 수은의 방전으로 생긴 자외선이 형광 물질과 반응하면서 가시광선을 방출해 빛을 냅니다. 최근엔 흰색뿐만 아니라 주광색, 전구색 등 따뜻한 느낌의 빛을 내는 형광등과 튜브형태가 아닌 삼파장 전구도 많이 쓰이고 있습니다. 10년 전만해도 형광등이 가장 많이 사용되는
▣ Painting Work for Indoor and Outdoor Environments Painting work involves creating a coating on the surface of construction materials for purposes such as preservation, anti-corrosion, insect prevention, fireproofing, and decoration. This process imparts moisture resistance, weather resistance, and chemical resistance to the materials. Common painting materials include paint, lacquer, varnish, and lacquer. The work
Safety Rules for Interior and Exterior Wall Painting Workers 더 읽기"
▣ 실내외에서 진행하는 도장 작업 도장 작업은 건설 구조물 재료 표면에 방부·방청·방충·방화나 장식을 목적으로 도막을 형성시켜 내습성·내후성·내약품성을 갖게 만드는 작업이다. 도장 재료는 페인트, 라카, 바니스, 옻칠등을 사용하고, 일반적으로는 롤러칠, 뿜칠, 붓칠 등의 공법으로 작업한다. 도장 작업은 바탕 처리 후 도장 및 양생의 순서로 진행하는데 ‘칠’은 일반적으로 초벌, 재벌, 정벌도장의 3공정으로 한다. 도장 작업은 구조물·목재면의 내부
≪ Shift workers are employees who work in shifts divided into two or more groups, each working at different times. Since shift workers may perform night shifts between 10 PM and 6 AM the following day, they are at risk of sleep disorders, chronic fatigue, high blood pressure, and cerebrovascular diseases due to disruptions in
Safety Guidelines for Shift Workers 더 읽기"
The “Humidifier Sanitizer Incident,” where consumers who used commercially purchased humidifier sanitizers suffered deaths or critical lung diseases, and the “Gumi Hydrogen Fluoride Leak Accident,” where a leak of ten tons of hydrogen fluoride gas at a factory handling the chemical resulted in the deaths of five workers and injuries to eighteen others, illustrate how
German Chemicals Management Act (REACH) 더 읽기"
Landscaping work involves tasks such as planting and nurturing flowers or trees in parks, around buildings, and in gardens, as well as transporting equipment and trees and digging holes for planting. During these processes, workers may be exposed to risks such as cutting, hitting, and noise while using equipment such as chainsaws and brush cutters.
Safety Guidelines for Using Brush Cutters and Chainsaws 더 읽기"
▣ Training for Anger Management The purpose of managing anger is to actively pursue a happier life. Anger can have productive and necessary functions, so transforming anger positively is the true way to manage it. Here are some techniques used for anger management when you feel angry. Thought Stopping: When you experience an event that
Managing Mental Health in Emotional Labor 더 읽기"
▣ 분노 조절 훈련법 분노를 다스리는 목적은 적극적으로 행복한 삶을 추구하는데 있습니다. 분노는 생산적이고 필요한 기능도 가지고 있기 때문에 분노를 긍정적으로 바꾸는 것이 진정한 의미에서 분노를 다스리는 방법이다. 분노를 느낄 때 분노 조절 기법으로 사용되고 있는 몇 가지 방법을 소개합니다. 생각 중단하기: 자신을 자극하는 사건을 경험하면 분노하게 되고, 끊임없이 생각하게 되는데 이것은 오히려 분노를 더 증폭시킬
A “vaccine” is an antigen artificially administered to the body to develop immunity against infectious diseases. The principle of vaccines first appeared in the historical record of the Peloponnesian War by the Greek historian Thucydides in 430 BC. The record noted that only those who had recovered from an infectious disease could nurse others suffering
Vaccines Beginning with Smallpox 더 읽기"
▣ Using Contact Lenses Safely: Tips and Precautions Contact lenses offer convenience and enhance appearance during activities such as sports and travel, compared to glasses. However, the rising number of contact lens wearers, especially among students and young women, underscores the importance of careful use and maintenance due to potential side effects. Since contact lenses
Precautions for Contact Lens Care 더 읽기"
In the “Korean Industrial Safety and Health Act,” noise work is defined as generating noise levels exceeding 85dB during an 8-hour workday. Working in environments with excessive noise levels poses health risks such as noise-induced hearing loss, especially with prolonged exposure. In areas where excessive noise is present, it is imperative to wear hearing protection.
Noise – Hearing Protection Devices 더 읽기"
▣ The safe light in your hand, the flashlight A flashlight is a portable lighting device that emits light using a bulb and batteries. In the United States, it’s called a flashlight, while in the United Kingdom, it’s referred to as a torch. The invention of the flashlight has revolutionized human life. ▣ The Birth
Where did flashlights come from? 더 읽기"
In the event of an occupational accident at an industrial site, whether to apply for workers’ compensation or pursue civil litigation is a decision between the employer and the injured party. However, systems for realizing the rights of workers under workers’ compensation, including the types of compensation and payment methods, often favor receiving compensation through
Work-Related Injury – Internal Handling & Industrial Accident Processing 더 읽기"
The Siren Named After the Sirens of Greek Mythology Auxiliary Instrument for the Organ A siren is a device that emits a sharp sound to signal or alert people to danger or emergencies. It is highly effective in notifying many people about disasters and hazards. The origin of the siren dates back to around 1799,
The Origin of the Siren (Greek Mythology) 더 읽기"
Asbestos Travels from the Nose to the Lungs. The nose acts as a passageway for inhaled air. The air we breathe mixes with dust, viruses, and various harmless and harmful agents. Nowadays, we regularly check the levels of particulate matter and ultrafine particles, as well as viruses and industrial materials like asbestos, all of which
Class 1 Carcinogen – Asbestos 더 읽기"
한양 대화재 사건으로 시작된 소방 역사 산이 많고 건조한 우리나라는 화재가 나기 쉬운 조건을 갖추고 있습니다. 나무나 짚으로 만든 기와집과 초가집이 대부분이라 불씨가 집으로 옮겨붙으면 금방 크게 타올랐습니다. 집들도 서로 가까이 붙어 있어 한 집에 불이 나면 온 동네를 태우고 나서야 꺼졌습니다. 화재는 재앙이었습니다. 화재를 진압하고 나면 그 원인을 찾는데 많은 힘을 들이고, 같은 일이
조경 작업은 공원, 건물 주변, 정원에 꽃이나 나무를 심고 가꾸는 업무, 장비나 나무를 운반하고 나무를 식재할 구멍을 파는 업무를 수행합니다. 이 과정에서 기계톱, 예초기 등의 장비를 사용하면서 베임, 맞음, 소음 등의 위험에 노출될 수 있습니다. ▣ 조경 작업에 필요한 기계·기구의 위험 ‘예초기’는 소형 엔진을 이용해 날을 회전시켜 풀을 베는데 사용하는 기계를 말합니다. 연료에 따라 휘발유를
시중에서 구입한 가습기 살균제를 쓴 소비자가 사망하거나 치명적인 폐 질환에 걸린 ‘가습기 살균제 사건’, 불산을 취급하는 공장에서 10톤의 불산 가스가 누출돼 5명의 노동자가 사망하고, 18명의 부상자가 생긴 ‘구미 불산 누출 사고’등은 산업 현장에서 발생되는 화학물질이 우리를 어떻게 위협하는지 보여줍니다. 독일은 이러한 사고를 예방하기 위해 노동자와 소비자를 모두 생각하는 화학물질관리법을 시행하고 있습니다. ▣소비자와 노동자 모두를 지키는
