### shield | helmet:

Bike helmet
* Some bike helmets are self-certified.
* are essential for rollerblading, skateboarding, scooters and cycling
  - safety tested for the types of falls that happen when biking
  - very important for both children and adults
* can prevent head injuries.
* save lives and save a child's future.

Horseshoe
* Have the children play a game of horseshoes with plastic horseshoes.
* are also great for couples, groups, and even children
  - guards
  - metal shoes nailed to the bottom of a horse's foot
  - plates
  - safety devices
* breathe well in low-oxygen muddy water.
* generally creep slowly over the seafloor munching along.
* have two basic configurations, open-heeled shoes and bar shoes.
* includes sections.

Magnetic shield
* Most magnetic shields act as barriers.
* provide a path around sensitive areas to deflect magnetic flux.

Nipple shield
* are artificial nipples worn over the mother's nipple during a feeding
  - shields
* can interfere with nipple stimulation resulting in low prolactin and oxytocin levels
  - slow the milk flow and encourage infection

Visor
* Most visors are part of helmets.
* are auto parts
  - automotive products
  - caps
  - the latest in handheld computer technology
* comes in many colours.
* offer additional protection

Shift
* also occur on meteorological, seismological and volcanic levels concerning the Earth itself.
* are also evident in the proportion of people who live in urban and rural areas
  - gang
  - hours
  - motion
* are part of work forces
  - workdays
  - translations

### shift:

Amplitude
* is abundances
  - magnitudes
* vary rapidly without concomitant changes in the solar wind.

### shift | amplitude:

Large amplitude
* occur when the driving force is in phase with the natural vibration of the system.
* pulses travel at the same speed as small amplitude pulses.

Noise level
* are amplitude.
* can cause distress and hypertension.
* is amplitude
  - that of a manufacturing environment and is usually loud

Antigenic shift
* Some antigenic shifts result in local epidemics or global pandemics.
* comes about because the genes of the influenza virus exist as discrete segments.
* is a. a change in the position of antigens on the virus.
* occurs every few years.
* refers to a more immediate and extensive change in genetic information.
* result in pandemics.

Chemical shift
* can reveal details of oxidation states and ligands of a given element.
* depend upon, What is next to the proton.
* indicate the type of enviroment in which a nucleus is situated.

Night shift
* are books
  - shifts
  - video games
* happen to cause night sweats too.

Paradigm shift
* are possible only when interrelationship of processes are understood.
* come when technologies are disruptive to the status quo.
* happen, and are important for theology.
* shift in worldview.

Phase shift
* describes the difference in timing between two otherwise identical periodic signals.
* is caused by imperfections in cable media, such as joins and imperfect terminations
  - the resetting of the internal clock due to an entraining agent
  - where two or more waveforms are out of step with each other

Reality shift
* Reality Shifts Come explore the ways our thoughts and feelings change the physical world.
* relatively new term to describe an ancient phenomenon.

Retrogression
* caused by burning is described for marshes, bogs, and bog forests.
* means returning to a less complex level of development.