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Here is a sample of public Insights made by Insight Maker users. This list is auto-generated and updated daily.

 Here we have a basic SEIR model and we will investigate what changes would be appropriate for modelling the 2019 Coronavirus 

Here we have a basic SEIR model and we will investigate what changes would be appropriate for modelling the 2019 Coronavirus 

672 4 weeks ago
 This model is derived from the paper " Nobody Ever Gets Credit for Fixing Problems that Never Happened: Creating and Sustaining Process Improvement " by Nelson P. Repenning and John D Sterman. See  Insight 752  for a causal loop version of this model.  @ LinkedIn ,  Twitter ,  YouTube

This model is derived from the paper "Nobody Ever Gets Credit for Fixing Problems that Never Happened: Creating and Sustaining Process Improvement" by Nelson P. Repenning and John D Sterman. See Insight 752 for a causal loop version of this model.

@LinkedInTwitterYouTube

 From  Werner Ulrich 's JORS Articles Operational research and critical systems thinking – an integrated perspective.  Part 1 : OR as applied systems thinking.  Journal of the Operational Research Societ y advance online publication (14 December 2011). and  Part 2  :OR as argumentative practice.  Se

From Werner Ulrich's JORS Articles Operational research and critical systems thinking – an integrated perspective. Part 1: OR as applied systems thinking. Journal of the Operational Research Society advance online publication (14 December 2011). and Part 2 :OR as argumentative practice.

See also insight on Boundary Critique

3 5 months ago
 Ce modèle simule la dynamique d'une population dont la croissance est limitée par son environnement, un cas d'étude inspiré par la gestion des stocks de  légine australe  dans l'océan Austral.  Contrairement au modèle de croissance exponentielle (conditions idéales), la croissance de la légine n'es

Ce modèle simule la dynamique d'une population dont la croissance est limitée par son environnement, un cas d'étude inspiré par la gestion des stocks de légine australe dans l'océan Austral.

Contrairement au modèle de croissance exponentielle (conditions idéales), la croissance de la légine n'est pas infinie. Les ressources (nourriture, espace) sont limitées et la compétition augmente avec la population. Ce phénomène, appelé densité-dépendance, crée une auto-régulation qui freine la croissance et la fait tendre vers une limite : la capacité de charge (K). De plus, cette population est soumise à une pression extérieure : la pêche.

Les Composants du Modèle :

  • Variable d'état : L'Effectif du stock (N) de légines, qui est au cœur du système.

  • Paramètres Fondamentaux : Les caractéristiques biologiques de la légine et de son milieu déterminent les paramètres de sa croissance. Vous pouvez régler ces paramètres avec les curseurs :

    • bmax et dmin : Les taux de natalité et de mortalité optimaux, quand la densité est faible.

    • ddb et ddd : L'intensité de la compétition. Ils mesurent à quel point la reproduction ralentit et la mortalité augmente quand la population devient trop dense.

  • Flux :

    • Les flux de Naissances (B) et de Morts (D) ne sont plus simplement proportionnels à N, mais sont maintenant régulés par la densité.

    • Un nouveau flux de sortie contrôlé par l'homme est ajouté : la Pêche (Fisheries).

  • Indicateurs : Le modèle calcule des propriétés "émergentes" cruciales pour les gestionnaires, comme le taux de croissance maximal (rmax) et la Capacité de Charge (K) de l'écosystème.

Votre Mission d'Exploration : Votre objectif est de devenir un gestionnaire de pêcherie durable !

  1. Commencez avec une pêche nulle (Fisheries = 0) pour observer la courbe de croissance logistique naturelle de la légine et identifier sa capacité de charge K.

  2. Introduisez ensuite un effort de pêche modéré. Quel est son impact sur la taille de la population à l'équilibre ?

  3. Explorez différentes intensités de pêche pour trouver le Rendement Maximal Soutenable (RMS) : la plus grande quantité de poissons que vous pouvez pêcher chaque année sans provoquer l'effondrement du stock. Cliquez sur "SIMULATE" et gérez votre ressource !

  INTRODUCTION
  

  COVID-19  

 Coronavirus which was named COVID-19 is a
respiratory disease which affects the lungs of the infected person and thus
making such people vulnerable to other diseases such as pneumonia. It was first
discovered in Wuhan China in December 2019 and since then has spread

INTRODUCTION

COVID-19

Coronavirus which was named COVID-19 is a respiratory disease which affects the lungs of the infected person and thus making such people vulnerable to other diseases such as pneumonia. It was first discovered in Wuhan China in December 2019 and since then has spread across the world affecting more than 40 million people from which over one million have died.

In the early discovery of the COVID-19, there were measures that were put in place with the help World Health Organization (WHO). They recommended a social distance of 1.5 meters to 2 meters to curb the spread since the scientist warned that COVID-19 can be carried in the droplets when someone breathes or cough. Another measure which was advised by WHO was wearing of mask, especially when people are in group. Wearing of mask would ensure that someone’s droplets do not leave their mouth or nose when they breathe or cough. It also help one from breathing in the virus which believed to be contagious and airborne.

The World Health Organization also advised on washing of the hand and avoiding frequent touching of the face. People mostly use their hand to touch surfaces which mad their hand the greatest harbor of the disease. Therefore, washing hands with soap will kill and wash away the virus from the hands. Avoiding touching of face also will prevent people from contracting the disease since the virus is believed to enter the body through openings such as eye, nose and mouth.

Another measure as a precaution from contracting the disease was to avoid hand shaking, hugging, kissing and any other thing which would bring people together. These were measures put to ensure that COVID-19 do not move from one person to another because of its airborne nature and the fact that it can be carried from the mouth or nose droplets.

Healthcare workers, in most of the countries, were provided with Personal Protective Equipment (PPEs) which helped them to protect themselves from contracting the virus. Healthcare workers were at the forefront in combating the disease since they were the people receiving the sick, including the ones with the virus. This exposed them to COVID-19 more than anyone hence more care was needed for them. Their PPEs comprised of white overall covering the whole body from head to toes. It also includes face mask and googles worn to prevent anything getting in their eyes. Their hands also were covered with gloves which were removed occasionally to avoid concentration of the virus on one glove.

COVID-19 affected many economies across the world as it greatly affected the human economic activities across the world. Due to the nature and how it spread, COVID-19 lead many countries to lockdown the country as we know it. Travelling was stopped as many countries feared the surge of the virus due to many people travelling form the countries which are already greatly affected. Another reason which travelling was hampered was due to the fact that the virus could spread among the travelers in an airplane. There were no proper measures to ensure social distance in the airplane and many people feared travelling from fear of contracting the disease.

This greatly affected the economy of many countries including great economies like USA. Tourism industry was the one affected the most as many country mostly depend on foreign travelers as their tourist. Many countries do not have proper domestic tourism structure and therefore depend on visitors who travels from foreign countries. Such countries have their economies greatly affected since the earnings from tourism either gone down or was not there at all.

Apart from locking down the country from foreigners, many major cities across the world were under lockdown. This means that even the citizens of the country were neither allowed in or out of the city. This restricted movement of people affecting greatly the human economic activities as many businesses were closed down especially transport businesses. The movement of goods from one places to another was affected making business difficult to carry out. Many people who dealt in perishable agricultural products count losses as their farm produced were destroyed because of lack of wider market. Some countries banned some businesses such as importing second hand clothes since it was believed that they could harbor the virus. Most of the meeting places such as sporting events and pubs were closed down affecting greatly the people who were involved in such businesses.

Across the world, schools were closed. Schools contain students in large numbers which could affect many students across the world. Learning was temporary stopped as different countries were finding ways of curbing the virus.

Scientist are busy like bees across the world to find the vaccine for the diseases that have ravage many countries and above all, they are trying to find the cure. Many countries have carried out their trial of vaccines with the hope to find an effective vaccine for the virus.

Meanwhile it is necessary to find ways by which the virus can be controlled so that it doesn’t spread to a point where it come out of control. Some of the measures put by the WHO has been highlighted above, but these measures need to be studied to ensure that measures which are more effective are affected at great heights. I therefore, have created a model in Insight Maker to check how these measures prove their effectiveness over time.