Bøger af Abdoul Hamid Derra

The blockchain offers a transparent and auditable digital system, which ensures the integrity of documents, deeds or titles exchanged, as well as the timestamping and scheduling of all transactions concerning them. Authentication without identification on the networks proves to be much more protective of our personal data by the minimization of the data communicated that it allows: exposure to malicious intent and attacks of any kind is much reduced. The blockchain thus appears as a technological brick that complements the functionalities of existing systems, including centralized systems, by offering: an efficient technology for the exchange of transactions, the exchange of authenticated proofs or even certificates. In a distributed ledger, any observer can verify that each action modifying the state of the system is valid: in accordance with the set of rules, accepted by all, which govern the system.

An entity can be the victim of a volumetric DDOS attack exploiting a protocol even though it does not expose a service based on that same protocol. If redirection via DNS is used, it must be ensured that there is no trivial way of discovering the IP address to be protected. The use of this protection solution requires the implementation of an interconnection between the entity and the protection service provider. This interconnection may consist of the establishment of a wire tunnel, or, where possible, be direct and physically established. It is imperative to have appropriate contacts in-house at transit operators as well as at protection service providers to respond effectively in the event of an attack. Wherever possible, it is important to ensure that the service providers on which an entity depends are prepared for DDOS attacks. Monitoring and alerting facilities are needed to detect an incident. Unused services should be disabled at the server level.

Double-entry bookkeeping: Odoo automatically creates all the journal entries for each of your accounting transactions and Odoo uses double-entry bookkeeping system, I.E. All journal entries are automatically balanced. Accrual and cash basis methods: Odoo support both accrual and cash basis reporting. This allows you to report income / expense at the time transactions occur. Multi-companies: Odoo allows to manage several companies within the same database. Each company has its own chart of accounts and rules. You can get consolidation reports following your consolidation rules. Multi-currencies: every transaction is recorded in the default currency of the company. For transactions occurring in another currency, Odoo stores both the value in the currency of the company and the value in the currency of the transaction. Odoo can generate currencies gains and losses after the reconciliation of the journal items. International standards: Odoo accounting support more than 50 countries. The Odoo core accounting implements accounting standards that are common to all countries and customized apps are available to accommodate the specificities of individual country.

The nap is not a psychosomatic relaxation, but it is certainly a way to become aware of the need to practice a real relaxation session. That is why it should be part of our daily life. Many people believe that napping absolutely implies sleep. This is not true! The nap is essentially a rest of the brain. It implies a mental relaxation following a physical relaxation. It is not necessarily practiced in a lying position, it simply implies the ability to relax the muscles as much as possible and to be able to clear the mind. The siesta is therefore closer to relaxation than to sleep. The body must allow itself regular periods of rest. This prevents it from accumulating too much fatigue and also allows it to resume its activities more efficiently. This short, but deep relaxation appears to be a measure to avoid nervous fatigue. Recent studies have already proven that napping seems to have a protective effect on cardiovascular diseases.

There are certain products that are indispensable to civilized man and whose very use is a proof of civilization. Soap is one of these products. We recall here the famous words of liebig, who maintained that a people is all the more civilized and comfortable, the more soap it uses. This fact is materially well established by the dry figures of statistics. In ancient times, even up to the Middle Ages, soap was completely unknown or very little used. People were content with perfuming their clothes and bodies with odorous substances. The question of which people invented soap making is one that cannot be answered with precision. It seems that in the Middle Ages, in some countries, an alkaline solution was used to wash clothes, and to clean fine sheets, certain plant roots were marinated in water, which formed a foamy liquid (saponaria, saponaria). Despite the progress made by industrial chemistry, we still find some areas where the preparation of soap is the same as our ancestors did a thousand years ago: tallow, lime and wood ashes.

MAN HAS BEEN IMPROVING PLANTS SINCE AGRICULTURE FIRST EXISTED. THIS IS HOW MOST OF THE WRITINGS ON THE HISTORY OF PLANT IMPROVEMENT BEGIN. IN FACT, IT WOULD SEEM THAT MAN HAS ALWAYS TRIED, MORE OR LESS CONSCIOUSLY, TO PRESERVE THE SEEDS OF THE BEST PLANTS FOR LATER SOWING. WITHOUT KNOWING IT, OUR ANCESTORS PRACTICED WHAT IS NOW CALLED "MASSAL SELECTION". HOWEVER, TEN CENTURIES LATER, THE OBSERVATION OF THE POOR RESULTS OBTAINED REVEALS THE INACCURACY OF THIS FIRST STATEMENT. MAN HAS IN FACT ONLY JUST SUCCEEDED IN DOMESTICATING THE MAIN PLANTS CURRENTLY CULTIVATED BY TRANSFORMING PLANTS THAT ARE PERFECTLY ADAPTED TO THE NATURAL ENVIRONMENT INTO PLANTS THAT ARE USEFUL FOR HIM BUT OFTEN UNABLE TO SURVIVE ON THEIR OWN.GMO (GENETICALLY MODIFIED ORGANISM) HAS BECOME A RATHER PEJORATIVE ADJECTIVE, OFTEN CONFUSED WITH (AND LIMITED TO) CORN THAT IS INSENSITIVE TO A HERBICIDE OR AN INSECT, AND EVEN ATTRIBUTED TO EVERYTHING DERIVED FROM IT, FROM CORNFLAKES TO STARCH, IF NOT TO THE MILK OF COWS THAT HAVE CONSUMED IT.

The role of small and medium-sized enterprises in the economy is significant and their adaptation to their economic environment, their survival as well as their success represent important stakes for several actors. The changes in the economic environment that small and medium-sized enterprises face require them to optimize the allocation of their resources in order to ensure their growth. Many researchers agree that a company's performance depends on the effective management of its assets. With respect to the financial management behaviors of owner-managers, several studies on the causes of SME failure have shown that the adoption of financial management practices can make all the difference between failing and financially healthy firms.

The process of cell division, which begins with the zygote and continues until the birth of a complete human being, forms several billion cells functioning in harmony, takes place in the womb of the mother. This place allows the embryo to complete its nine months of development and is certainly a solid resting place. The ancients were perplexed as to the meaning of this resting place until science came to enlighten us and show us that it is a resting place of sublime perfection. Hence the location of the uterus between the bones of the pelvis, supported by muscles that connect it to the walls of the pelvis, and this amniotic fluid in which the fetus swims so as not to feel the movements of the mother and to prevent the membranes from adhering to the fetus during childbirth. On the other hand, the uterus allows the fetus to be isolated from external agents, light, noise, shocks and pressures. The uterus protects with thick and strong bones, is able to support the weight of the embryo until the end of pregnancy.