In one sentence, describe what the following article is about: Depending on the type of clarinet you play, there are usually several sections that connect together with cork tenons. You should ensure that mouthpiece, barrel, upper and lower joints, and bell fit together properly. If you are a new player, make sure that the upper and lower joints are situated properly for your hands. The upper joint is for your left and should be on your left side, and vice versa with your right hand and your lower joint. A dry reed could be the culprit in your clarinet squeaking. Your reed should be firm, but not hard as a rock. If your reed is new, it might need some extra time soaking in water to get the proper amount of moisture. Your reed also needs to be kept at the right moisture level so it is easy to work with. Keep it in a special box that controls environmental changes. Only a narrow opening should remain between the reed itself and the mouthpiece to make the best sound possible. Ask your instructor if you are having trouble, or if you are not sure if the angle is correct. This can be a lesson of trial and error. Even the smallest of screws can hinder your playing ability. Some are hard to see, so do a thorough visual examination to determine any culprits. If you do detect a loose screw, find a screwdriver that fits and screw it back in. Be very careful that you do not strip the screw. If you cannot find a properly fitting screwdriver, you may need to visit your local music store.
Summary: Make sure that your clarinet is put together correctly. Check if your reed is moist. Place your reed in the mouthpiece at a 45-degree angle. Examine your clarinet for loose screws.

The decision to retire is very significant, and you should start planning for your retirement at least six months in advance.  This allows you time to make sure you are comfortable with your decision before making things formal, tie up any loose ends, and use any remaining vacation days. Be sure to familiarize yourself with your company's retirement policies, and download compensation statements and benefits information from your company's website while you still have company log-in credentials.  These policies will also let you know if your company has a rule about how far in advance you must notify your employer and/or human resources office, which will likely determine when you take the next steps. It's important that you follow company protocol, but most of the time you will have some leeway regarding when to tell your immediate supervisor of your impending retirement.  Be cautious about announcing too early. Doing so can signal to your employer that you are not as invested, and you might be passed over for projects or asked to leave earlier to make room for your replacement. Similarly, if you are in a supervisory position, your employees may not listen to your directives or respect your authority. If you do fear any negative repercussions of your announcement, it might be best to wait until the last minute as per your employee handbook.  Just as with any other position you have left in your career, regardless of your handbook, you should tell your plans to your boss no later than three weeks prior to your intended date of retirement. The "three week notice" is the bare minimum of time required to find, hire and train a replacement. If you have a senior position or one that is difficult to replace, it is not unusual to give three to six months of notice, to give your company time to locate and train a suitable replacement.  Think about the relationship you have with your supervisor and company, and if that relationship is important to maintain in your retirement. Being thoughtful of the position your company will be in when you retire can go a long way in maintaining good feelings on both sides. This will ensure that you have a bit of time to discuss your plans but that you are not interrupting your boss's other work responsibilities.  The level of formality of this meeting will depend on the relationship with your boss or supervisor. If you have a strictly professional relationship, the announcement will be similarly formal. If you have a more friendly relationship, however, the announcement can be less rigid and more conversational. If you have not finalized your plans but are giving the boss the news as a courtesy, be sure to say so. Simply say, "I am thinking about retiring in June-- but I have not quite made up my mind. When is the absolute latest you will need to know?"  If the plans are finalized, say, "I have been thinking about this for a long time, and I've decided it is time to retire. I will be retiring at the end of June." Either way, let your boss know that you want to make the transition as smooth as possible. Some bosses have a policy that they themselves will make a formal announcement of your retirement to the rest of the staff, but some prefer that you announce to your coworkers yourself. If you have a preference, be sure to let him or her know.  If the boss will send a memo, post a bulletin, or make an announcement, you will not need to announce you're retiring to the rest of the staff in a formal capacity. If you actually prefer to tell all (or some) colleagues yourself, ask the boss to wait to announce until you've had a chance to talk to these important people yourself. Even though you might not be planning to take another job or go back to work following retirement, the current economy is unpredictable and it is smart to ask your supervisors for three letters of recommendation just in case of contingency. It is better to do this now while your excellent work ethic is fresh in their minds than to wait until you need the letters, when they may have moved to other companies and be harder to track down. The letter is a formality and it can be brief, but should state the date of your retirement.  Give the letter to your boss after you have verbally told her of your plans. Even though you've made your intentions clear verbally, human resources will require a formal letter to file in their records. Payroll will also need the information to make sure you're given all relevant sick days or other compensation. Be sure to follow up with human resources immediately to find out what paperwork will be required and when it is due.
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One-sentence summary -- Start planning well in advance. Decide when to tell your boss. Schedule a private meeting for the end of the day. Ask your boss about how to tell the rest of the staff. Write a letter to your boss officially announcing your intention to retire.

Problem: Article: People who live closer to the equator are exposed to more ultra-violet (UV) radiation, so their cells produce more melanin. This excess melanin leads to a darker skin pigmentation that helps the skin protect itself from UV damage. Keeping out of the sun will keep skin from producing extra melanin, which may help the pigment return to a paler state. If your skin is naturally dark, however, staying out of the sun won't do much.  Keep out of the sun as much as possible, especially in the late morning and afternoon. If you must be outside while the sun is brightest, try to stick to the shade. Try carrying an umbrella to protect yourself from the sun. A regular black umbrella that’s designed to keep you dry in the rain will also block out at least 90 percent of UV rays.  Remember that sunlight and UV rays bounce off concrete, water, sand, snow, and other surfaces. Be aware of your environment! Choose a broad-spectrum sunscreen that protects against UVA (rays that age your skin) and UVB (rays that burn your skin). Find a sunscreen with an SPF (sun-protection factor) between 30 and 50. Any SPF above 50 is not significantly more effective, so don’t worry about finding the highest number. You are still exposed to UV rays in winter, even though it's cooler. Wear sunscreen every day of the year, especially if you enjoy winter sports at high elevations. Most summer-weight clothing (e.g. cotton garments) does not provide a measurable amount of sun protection. Look for clothes with a UPF (ultraviolet protection) rating. Choose clothes with long sleeves, long hems, and high collars. Consider wearing sunglasses, gloves, and wide-brimmed hats. The sun is necessary for vitamin D production, but most people don’t need more than 20 minutes of uncovered exposure.
Summary:
Avoid UV exposure. Wear sunscreen. Wear protective clothing.