Construct version 5.4.4
An agent based modeling framework

Social Media model that modifies user behavior based on their emotional state. More...
Public Member Functions  
SM_nf_emotions (const std::string &_media_name, InteractionItem::item_keys event_key, const dynet::ParameterMap ¶ms, Construct &construct)  
Social_Media_no_followers::media_user *  get_default_media_user (const Node &node) override 
InteractionItem  convert_to_InteractionItem (media_event *_event, unsigned int sender_index, unsigned int receiver_index) const override 
Public Member Functions inherited from Social_Media_no_followers  
void  load_events (const std::string &fname, const dynet::datetime &start_time, float time_conversion, const std::map< std::string, unsigned int > &agent_mask=std::map< std::string, unsigned int >()) 
Parses the content of a json file and loads the information into Social_Media_no_followers::list_of_events. More...  
virtual media_event *  create_post (unsigned int knowledge_index, unsigned int id) 
Creates a post event and adds it to Social_Media_no_followers::list_of_events. More...  
virtual media_event *  create_response (unsigned int id, media_event *parent) 
Creates a response event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...  
virtual media_event *  create_quote (unsigned int id, media_event *parent) 
Creates a quote event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...  
virtual media_event *  create_reply (unsigned int id, media_event *parent) 
Creates a reply event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...  
virtual media_event *  create_repost (unsigned int id, media_event *parent) 
Creates a quote event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...  
virtual void  finalize_event (media_event *_event) 
Allows each model to intercept the created event. More...  
void  check_list_order () const 
Checks the list of events to make sure the time stamps are sorted in descending order. More...  
Social_Media_no_followers::media_user &  user (unsigned int index) 
Social_Media_no_followers (const std::string &_media_name, InteractionItem::item_keys event_key, const dynet::ParameterMap ¶meters, Construct &_construct)  
Base constructor for any social media model. More...  
virtual  ~Social_Media_no_followers () 
All pointers in Social_Media_with_followers::users are deallocated.  
virtual media_user *  get_default_media_user (const Node &node) 
Gets the default media user for a social media class. More...  
void  think (void) override 
Agents read events in their feed and create messages based on the read events. More...  
void  initialize (void) override 
Loads users using Social_Media_no_followers::load_user and adds Knowledge_Parser to Construct::message_parsers if one is not present. More...  
void  communicate (const InteractionMessage &msg) override 
Parses messages that contain the Social_Media_no_followers::event key in their attributes. If the event contains the attribute, media_user::(read, reply, quote, and repost) are called from the receiver's index in Social_Media_no_followers::users More...  
void  cleanup (void) override 
Feeds are updated, list_of_events::removed_events are cleared, and events are erased from list_of_events that have have become inactive. More...  
virtual void  append_message (media_event *_event, InteractionMessage &msg) 
Appends the array of InteractionItems based on the submitted event and the intended receiver of the message. More...  
virtual InteractionItem  convert_to_InteractionItem (media_event *_event, unsigned int sender_index, unsigned int receiver_index) const 
Copies some or all information from the submitted event based on the sender's and receiver's node attributes. More...  
virtual int  get_feed_priority (const media_event &_event, unsigned int user) 
Returns 10 if the user is mentioned by the event or if the event is a reply to an event authored by the user. Returns 100 otherwise. More...  
virtual void  update_event_scores () 
Goes through all events and updates media_event::score to media_event::child_size * media_event::time_stamp. More...  
virtual void  random_event_swapping (unsigned int user_index) 
Randomly swaps 10% of events in the user's feed. More...  
virtual void  update_feeds (float new_events_timestamp) 
Updates each user's feeds. More...  
template<typename function >  
auto  get_events (function filter) 
Public Member Functions inherited from Model  
Model (Construct &_construct)  
Constructor for all models in Construct. More...  
virtual  ~Model (void) 
Virtual Deconstructor. More...  
virtual void  initialize (void) 
Function called once before any simulation cycles begin. More...  
virtual void  think (void) 
First function called in a simulation cycle. More...  
virtual void  update (void) 
Function called after the think functions in a simulation cycle. More...  
virtual bool  intercept (InteractionItem &item, unsigned int sender, unsigned int receiver, const CommunicationMedium *medium) 
Allows for models to effect change to items created by other models. More...  
virtual void  communicate (const InteractionMessage &msg) 
Function called after the update functions in a simulation cycle. More...  
virtual void  cleanup (void) 
Function called after the Model::communicate functions in a simulation cycle. More...  
void  add_base_model_to_model_manager (const std::string &base_model_name) 
Adds a derived model under the name of the base model and disables the model manager from calling its functions.  
Public Attributes  
const Nodeset *  emotions = ns_manager.get_nodeset(nodeset_names::emotions) 
const Graph< float > &  emotion_net = graph_manager.load_required(graph_names::emotion_net, agents, emotions) 
const Graph< float > &  emot_broadcast_bias = graph_manager.load_optional(graph_names::emot_broad_bias, 1.0f, agents, false, emotions, false) 
The base probability an agent attaches an emotion. More...  
const Graph< float > &  emot_broadcast_first = graph_manager.load_optional(graph_names::emot_broad_first, 0.0f, emotions, false, emotions, false) 
The first order emotional dependence on the probability an agent attaches an emotion. More...  
const Graph< std::map< unsigned int, float > > &  emot_broadcast_second 
The second order emotional dependence on the probability an agent attaches an emotion. More...  
const Graph< float > &  pd_emotion_first = graph_manager.load_optional("first order post density emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability density for how many posts an agent creates each timestep. More...  
const Graph< float > &  pd_emotion_second = graph_manager.load_optional("second order post density emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability density for how many posts an agent creates each timestep. More...  
const Graph< float > &  pr_emotion_first = graph_manager.load_optional("first order reply probability emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability that an agent replies to an event when reading it. More...  
const Graph< float > &  pr_emotion_second = graph_manager.load_optional("second order reply probability emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability that an agent replies to an event when reading it. More...  
const Graph< float > &  prp_emotion_first = graph_manager.load_optional("first order repost probability emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability that an agent reposts an event when reading it. More...  
const Graph< float > &  prp_emotion_second = graph_manager.load_optional("second order repost probability emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability that an agent reposts an event when reading it. More...  
const Graph< float > &  pq_emotion_first = graph_manager.load_optional("first order quote probability emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability that an agent quotes an event when reading it. More...  
const Graph< float > &  pq_emotion_second = graph_manager.load_optional("second order quote probability emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability that an agent quotes an event when reading it. More...  
const Graph< float > &  pread_emotion_first = graph_manager.load_optional("first order read density emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability density for how many posts an agent reads each timestep. More...  
const Graph< float > &  pread_emotion_second = graph_manager.load_optional("second order read density emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability density for how many posts an agent reads each timestep. More...  
const Graph< float > &  kselect_emotion = graph_manager.load_optional("knowledge select emotion network", 0.0f, knowledge, false, emotions, false) 
The emotional dependence on the probability weight an agent selects a knowledge bit for creating an event. More...  
const Graph< float > &  kselect_trust = graph_manager.load_optional("knowledge select trust network", 0.0f, agents, false, knowledge, false) 
The knowledge trust dependence on the probability weight an agent selects a knowledge bit for creating an event. More...  
const Graph< float > &  kselect = graph_manager.load_optional("knowledge select bias network", 1.0f, agents, false, knowledge, false) 
The base probability weight an agent selects a knowledge bit for creating an event. More...  
Public Attributes inherited from Social_Media_no_followers  
event_container  list_of_events 
The list of all current events in this social media. New events should be added to the front of this list.  
const Nodeset &  agents = ns_manager.get_nodeset(nodeset_names::agents) 
const Nodeset &  knowledge = ns_manager.get_nodeset(nodeset_names::knowledge) 
const CommunicationMedium  medium 
The medium used for all messages created by this model.  
const InteractionItem::item_keys  event_key 
The item key added to all messages created by this model.  
std::vector< std::vector< media_event * > >  users_feed 
Each user's feed of events with the first dimension corresponding to each user. More...  
std::vector< unsigned int >  read_count 
float  age 
The maximum time a post can exist without its tree being added to.  
float  dt 
The time duration between time steps.  
float  time = 0.0f 
The current time period.  
std::string  media_name 
The prefix for some of the node attributes names parsed by the media_user class.  
Graph< bool > &  knowledge_net = graph_manager.load_required(graph_names::knowledge, agents, knowledge) 
Pointer to the graph with name "knowledge network".  
const Graph< bool > *  active_agents = graph_manager.load_optional(graph_names::active, true, agents, sparse, ns_manager.get_nodeset(nodeset_names::time), sparse) 
Pointer to the graph with name "agent active time network".  
std::vector< media_user * >  users 
The list of users. More...  
std::function< bool(media_event &)>  current_timestep = [this](media_event& _event) { return _event.time_stamp > time  0.5f * dt; } 
std::function< bool(media_event &)>  previous_timestep = [this](media_event& _event) { return _event.time_stamp > time  1.5f * dt; } 
std::function< bool(media_event &)>  active = [this](media_event& _event) { return _event.last_used > time  age; } 
std::function< void(Social_Media_no_followers *, unsigned int)>  feed_update_output 
std::function< void(Social_Media_no_followers *)>  cleanup_output 
Public Attributes inherited from Model  
Construct &  construct 
GraphManager &  graph_manager 
NodesetManager &  ns_manager 
Random &  random 
bool  valid 
If member is false, the model's functions are not called.  
Social Media model that modifies user behavior based on their emotional state.
This model holds the various networks that SM_nf_emotions::default_media_user uses supplement the increased descision making complexity. In addition, this model attaches emotions to messages. As emotions can not be saved directly in an event, so the emotional state of the agent when they create an event is saved in attached_emotions.

inline 
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overridevirtual 
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Reimplemented from Social_Media_no_followers.
Reimplemented in SM_wf_emotions.

inlineoverridevirtual 
const Graph<float>& SM_nf_emotions::emot_broadcast_bias = graph_manager.load_optional(graph_names::emot_broad_bias, 1.0f, agents, false, emotions, false) 
The base probability an agent attaches an emotion.
Dimensions: agent x emotion
This network is a part of the equation for calculating the probability that an agent attaches an emotion to a message they send. The probability agent \(i\) attaches emotion \(n\) is \(P_{i,n}=A_{i,n}+\sum_mB_{n,m}E_{i,m}+\sum_{m,g}C_{n,m,g}E_{i,m}E_{i,g}\) where \(A_{i,n}\) corresponds to links in this network.
const Graph<float>& SM_nf_emotions::emot_broadcast_first = graph_manager.load_optional(graph_names::emot_broad_first, 0.0f, emotions, false, emotions, false) 
The first order emotional dependence on the probability an agent attaches an emotion.
Dimensions: emotion x emotion
This network is a part of the equation for calculating the probability that an agent attaches an emotion to a message they send. The probability agent \(i\) attaches emotion \(n\) is \(P_{i,n}=A_{i,n}+\sum_mB_{n,m}E_{i,m}+\sum_{m,g}C_{n,m,g}E_{i,m}E_{i,g}\) where \(B_{n,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\).
const Graph<std::map<unsigned int, float> >& SM_nf_emotions::emot_broadcast_second 
The second order emotional dependence on the probability an agent attaches an emotion.
Dimensions: emotion x emotion x emotion
This network is a part of the equation for calculating the probability that an agent attaches an emotion to a message they send. The probability agent \(i\) attaches emotion \(n\) is \(P_{i,n}=A_{i,n}+\sum_mB_{n,m}E_{i,m}+\sum_{m,g}C_{n,m,g}E_{i,m}E_{i,g}\) where \(C_{n,m,g}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\).
const Nodeset* SM_nf_emotions::emotions = ns_manager.get_nodeset(nodeset_names::emotions) 
summary>
const Graph<float>& SM_nf_emotions::kselect = graph_manager.load_optional("knowledge select bias network", 1.0f, agents, false, knowledge, false) 
The base probability weight an agent selects a knowledge bit for creating an event.
Dimensions: agent x knowledge
This network is a part of the equation for calculating the probability weight for selecting a knowledge bit. The probability weight agent \(i\) selecting knowledge \(k\) is \(P_{i,k}=A_{i,k}+\sum_mB_{i,k}T_{i,k}0.5+\sum_mC_{k,m}E_{i,m}\) where \(A_{i,k}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(T_{i,k}\) is the agent's trust in that knowledge bit.
const Graph<float>& SM_nf_emotions::kselect_emotion = graph_manager.load_optional("knowledge select emotion network", 0.0f, knowledge, false, emotions, false) 
The emotional dependence on the probability weight an agent selects a knowledge bit for creating an event.
Dimensions: knowledge x emotion
This network is a part of the equation for calculating the probability weight for selecting a knowledge bit. The probability weight agent \(i\) selecting knowledge \(k\) is \(P_{i,k}=A_{i,k}+\sum_mB_{i,k}T_{i,k}0.5+\sum_mC_{k,m}E_{i,m}\) where \(C_{k,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(T_{i,k}\) is the agent's trust in that knowledge bit.
const Graph<float>& SM_nf_emotions::kselect_trust = graph_manager.load_optional("knowledge select trust network", 0.0f, agents, false, knowledge, false) 
The knowledge trust dependence on the probability weight an agent selects a knowledge bit for creating an event.
Dimensions: agent x knowledge
This network is a part of the equation for calculating the probability weight for selecting a knowledge bit. The probability weight agent \(i\) selecting knowledge \(k\) is \(P_{i,k}=A_{i,k}+\sum_mB_{i,k}T_{i,k}0.5+\sum_mC_{k,m}E_{i,m}\) where \(B_{i,k}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(T_{i,k}\) is the agent's trust in that knowledge bit.
const Graph<float>& SM_nf_emotions::pd_emotion_first = graph_manager.load_optional("first order post density emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability density for how many posts an agent creates each timestep.
Dimensions: agent x emotion
This network is a part of the equation for calculating the probability density for how many posts an agent creates each timestep. The probability density for how many posts agent \(i\) creates is \(P^{(post)}_i=pdp_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(B_{i,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pdp_i\) is the value Social_Media_no_followers::default_media_user::pdp.
const Graph<float>& SM_nf_emotions::pd_emotion_second = graph_manager.load_optional("second order post density emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability density for how many posts an agent creates each timestep.
Dimensions: emotion x emotion
This network is a part of the equation for calculating the probability density for how many posts an agent creates each timestep. The probability density for how many posts agent \(i\) creates is \(P^{(post)}_i=pdp_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(C_{n,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pdp_i\) is the value Social_Media_no_followers::default_media_user::pdp.
const Graph<float>& SM_nf_emotions::pq_emotion_first = graph_manager.load_optional("first order quote probability emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability that an agent quotes an event when reading it.
Dimensions: agent x emotion
This network is a part of the equation for calculating the quote probability. The probability agent \(i\) quotes an event is \(P^{(quote)}_i=pqu_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(B_{i,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pqu_i\) is the value Social_Media_no_followers::default_media_user::pqu.
const Graph<float>& SM_nf_emotions::pq_emotion_second = graph_manager.load_optional("second order quote probability emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability that an agent quotes an event when reading it.
Dimensions: emotion x emotion
This network is a part of the equation for calculating the quote probability. The probability agent \(i\) quotes an event is \(P^{(quote)}_i=pqu_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(C_{n,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pqu_i\) is the value Social_Media_no_followers::default_media_user::pqu.
const Graph<float>& SM_nf_emotions::pr_emotion_first = graph_manager.load_optional("first order reply probability emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability that an agent replies to an event when reading it.
Dimensions: agent x emotion
This network is a part of the equation for calculating the reply probability. The probability agent \(i\) replies to an event is \(P^{(reply)}_i=pr_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(B_{i,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pr_i\) is the value Social_Media_no_followers::default_media_user::pr.
const Graph<float>& SM_nf_emotions::pr_emotion_second = graph_manager.load_optional("second order reply probability emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability that an agent replies to an event when reading it.
Dimensions: emotion x emotion
This network is a part of the equation for calculating the reply probability. The probability agent \(i\) replies to an event is \(P^{(reply)}_i=pr_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(C_{n,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pr_i\) is the value Social_Media_no_followers::default_media_user::pr.
const Graph<float>& SM_nf_emotions::pread_emotion_first = graph_manager.load_optional("first order read density emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability density for how many posts an agent reads each timestep.
Dimensions: agent x emotion
This network is a part of the equation for calculating the read probability density. The probability density for how many posts agent \(i\) reads is \(P^{(read)}_i=pdread_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(B_{i,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pdread_i\) is the value Social_Media_no_followers::default_media_user::pdread.
const Graph<float>& SM_nf_emotions::pread_emotion_second = graph_manager.load_optional("second order read density emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability density for how many posts an agent reads each timestep.
Dimensions: emotion x emotion
This network is a part of the equation for calculating the read probability density. The probability density for how many posts agent \(i\) reads is \(P^{(read)}_i=pdread_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(C_{n,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(pdread_i\) is the value Social_Media_no_followers::default_media_user::pdread.
const Graph<float>& SM_nf_emotions::prp_emotion_first = graph_manager.load_optional("first order repost probability emotion network", 0.0f, agents, false, emotions, false) 
The first order emotional dependence on the probability that an agent reposts an event when reading it.
Dimensions: agent x emotion
This network is a part of the equation for calculating the repost probability. The probability agent \(i\) reposts an event is \(P^{(repost)}_i=prp_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(B_{i,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(prp_i\) is the value Social_Media_no_followers::default_media_user::prp.
const Graph<float>& SM_nf_emotions::prp_emotion_second = graph_manager.load_optional("second order repost probability emotion network", 0.0f, emotions, false, emotions, false) 
The second order emotional dependence on the probability that an agent reposts an event when reading it.
Dimensions: emotion x emotion
This network is a part of the equation for calculating the repost probability. The probability agent \(i\) reposts an event is \(P^{(repost)}_i=prp_i+\sum_mB_{i,m}E_{i,m}+\sum_{n,m}C_{n,m}E_{i,n}E_{i,m}\) where \(C_{n,m}\) corresponds to links in this network and \(E_{i,m}\) is the agent's emotional value for emotion \(m\) and \(prp_i\) is the value Social_Media_no_followers::default_media_user::prp.