scholarly journals Social optimal shifts and fares of taxi services

2016 ◽  
Author(s):  
Josep Maria Salanova Grau ◽  
Miquel Estrada Romeu
Keyword(s):  
Time Frame ◽  
Access Time ◽  
Fleet Size ◽  
Time Period ◽  
Decision Variables ◽  
The One ◽  
Vehicle Travel Time ◽  
Generalized Cost ◽  
Full Day

This paper presents a mathematical model for supporting the decision and policy making related to the optimal determination of shifts and fares of taxi services in a major city. The model is based on the system’s generalized cost function and uses continuous approximations and geometric probabilities for estimating the key performance indicators of the taxi market, which are waiting and access time for the customers (in-vehicle travel time does not depend on the offer side) and benefits for the drivers. The model is based on an econometric model with the inclusion of an elastic demand, which allows the estimation of the optimal values for the two decision variables of the problem: fare structure and the taxi fleet size. The model also accounts for a full-day time period instead of the one-hour time frame models used in most of the taxi models, which allows for providing insights on the daily duration and distribution of the shifts that should be defined by the policy makers.DOI: http://dx.doi.org/10.4995/CIT2016.2016.3254

scholarly journals Analysis of the degree of innovative labor activization of the employed population of Ukraine

2019 ◽  
Vol 17 (3) ◽  
pp. 68-74 ◽  
Author(s):  
Nataliia Gavkalova ◽  
Alona Zolenko
Keyword(s):  
Time Period ◽  
Methodical Approach ◽  
Analysis And Synthesis ◽  
The Status ◽  
Structured Analysis ◽  
Innovative Work ◽  
The One ◽  
Intellectual Potential ◽  
Integral Indicator

The activization of innovative labor of the employed population is an important prerequisite for socio- economic development in Ukraine. In the context of high IT penetration and intellectualization of Ukraine’s economy, this innovative type of employment will contribute not only to the realization of the population creative and intellectual potential, but also to the improvement of human capital quality. Therefore, the purpose of this article is to develop a methodical approach to determine the degree of activization of the employed population innovative labor. With this aim in mind, a set of methods was used in the research, such as analysis and synthesis, logical generalization and comparison, taxonomic analysis and formalization. The peculiarity of the developed methodical approach is the ability: to evaluate the initial indicators in a certain time period; to group them into partial indicators reflecting the status and features of innovative work of the employed population at the regional level; to analyze the level of partial indicators with the determination of average values in time and regional aspects; to determine the level of the integral indicator. This will allow, on the one hand, making more structured analysis, and on the other, conducting comprehensive analysis of causes of dynamics for both innovative labor and its components.

scholarly journals TINJAUAN MANFAAT PENETAPAN JANGKA WAKTU TERTENTU BAGI WAJIB PAJAK DENGAN PEREDARAN BRUTO TERTENTU

2020 ◽  
Vol 13 (2) ◽  
pp. 53-64
Author(s):  
Taufik Kurachman
Keyword(s):  
Financial Reporting ◽  
Government Regulation ◽  
Opportunity To Learn ◽  
Financial Statements ◽  
Time Frame ◽  
Time Restrictions ◽  
Time Period ◽  
Library Studies ◽  
Qualitative Descriptive

Peraturan Pemerintah nomor 23 Tahun 2018 bertujuan memberikan kemudahan dan juga insentif bagi UMKM dengan menekankan pengurangan tarif menjadi 0,5% dan penetapan jangka waktu tertentu yaitu 7 tahun untuk WP perorangan, 4  tahun untuk WP badan usaha berbentuk koperasi, CV, atau firma dan 3 tahun untuk WP badan berupa PT. Pembatasan waktu bertujuan memberikan kesempatan UMKM untuk belajar pembukuan dan membuat pelaporan keuangan. Tetapi apakah periode waktu releksasi cukup untuk mencapai tujuan? Untuk menjawab permasalahan tersebut, penelitian ini menggunakan metode deskriptif kualitatif, dimana data dan informasi diperoleh melalui studi pustaka dan wawancara dengan UMKM. Studi tersebut memberikan temuan penting. Pertama, sebagian WP belum mengetahui penetapan jangka waktu tersebut. Kedua, sebagian WP belum memahami tujuan penetapan jangka waktu tersebut, Ketiga sebagian WP belum siap untuk menggunakan pembukuan serta berharap penetapan jangka waktu tersebut dihilangkan. Untuk itu DJP perlu meningkatkan fungsi penyuluhan penetapan jangka waktu dan pembuatan laporan keuangan.  Government Regulation no. 23/2018 aims to provide convenience and incentive for MSMEs by emphasizing tariff reduction to 0.5% and determination of a certain period of 7 years for individual WP, 4 years for WP business entity in the form of cooperatives, CV, or firm and 3 years for wp entities in the form of PT. Time restrictions aim to provide MSMEs the opportunity to learn bookkeeping and make financial reporting. But is the time period sufficient to achieve the goal? To answer the problem, this study uses qualitative descriptive methods, where data and information are obtained through library studies and interviews with MSMEs. The study provides important findings. First, some WP does not know the time frame. Second, some WP does not yet understand the purpose of setting that time frame, the third part of WP is not ready to use bookkeeping and expect the determination of that time frame to be eliminated. Therefore, DJP needs to improve the counseling function of the determination of time frame and the creation of financial statements..

degree of payability of debts and capital. Subsequent classification of accounts depended on the physical or legal nature of the ele­ ments they represented. The logic behind the balance sheet framework was based on the representation on an industrial and/or commercial firm with the following characteristics: productive assets having a long-term useful life and an irregular renewal pattern; long-term financing for long-term productive assets; inventories rotating rapidly in less than a one-year time period; and an operations cycle whose dura­ tion was also considered to be less than one year. This representa­ tion led to a classification of assets, debts and owners’ equity based on the one-year time period, the year being traditionally considered as the usual time frame for the accounting period. The permanent resources at the disposal of the firm, together with their investment in long-term production means, were therefore shown in the upper part of the balance sheet, with short-term assets and debts appearing below. Exhibit 1 indicates the structure of the balance sheet as it has been outlined above, as well as the Exhibit 1 Structure o f the Balance Sheet: Relationships Between Classes o f the Chart of Accounts and Balance Sheet Elem ents

2014 ◽  
pp. 347-347
Keyword(s):  
Balance Sheet ◽  
Time Frame ◽  
Time Period ◽  
Legal Nature ◽  
Useful Life ◽  
One Year ◽  
The One ◽  
Productive Assets

Two-Stage Procedure for the Quantitative Determination of Autoprothrombin III Concentration and Some Applications

1967 ◽  
Vol 18 (01/02) ◽  
pp. 198-210 ◽  
Author(s):  
Ronald S Reno ◽  
Walter H Seegers
Keyword(s):  
Prothrombin Time ◽  
Factor Vii ◽  
Two Stage ◽  
Pronounced Increase ◽  
One Stage ◽  
Assay Procedure ◽  
Bovine Plasma ◽  
The One ◽  
Autoprothrombin C

SummaryA two-stage assay procedure was developed for the determination of the autoprothrombin C titre which can be developed from prothrombin or autoprothrombin III containing solutions. The proenzyme is activated by Russell’s viper venom and the autoprothrombin C activity that appears is measured by its ability to shorten the partial thromboplastin time of bovine plasma.Using the assay, the autoprothrombin C titre was determined in the plasma of several species, as well as the percentage of it remaining in the serum from blood clotted in glass test tubes. Much autoprothrombin III remains in human serum. With sufficient thromboplastin it was completely utilized. Plasma from selected patients with coagulation disorders was assayed and only Stuart plasma was abnormal. In so-called factor VII, IX, and P.T.A. deficiency the autoprothrombin C titre and thrombin titre that could be developed was normal. In one case (prethrombin irregularity) practically no thrombin titre developed but the amount of autoprothrombin C which generated was in the normal range.Dogs were treated with Dicumarol and the autoprothrombin C titre that could be developed from their plasmas decreased until only traces could be detected. This coincided with a lowering of the thrombin titre that could be developed and a prolongation of the one-stage prothrombin time. While the Dicumarol was acting, the dogs were given an infusion of purified bovine prothrombin and the levels of autoprothrombin C, thrombin and one-stage prothrombin time were followed for several hours. The tests became normal immediately after the infusion and then went back to preinfusion levels over a period of 24 hrs.In other dogs the effect of Dicumarol was reversed by giving vitamin K1 intravenously. The effect of the vitamin was noticed as early as 20 min after administration.In response to vitamin K the most pronounced increase was with that portion of the prothrombin molecule which yields thrombin. The proportion of that protein with respect to the precursor of autoprothrombin C increased during the first hour and then started to go down and after 3 hrs was equal to the proportion normally found in plasma.

SIMPLIFIED DEXAMETHASONE SUPPRESSION TEST

1969 ◽  
Vol 61 (2) ◽  
pp. 219-231 ◽  
Author(s):  
V. H. Asfeldt
Keyword(s):  
Cushing’S Syndrome ◽  
Normal Subjects ◽  
Cushing's Syndrome ◽  
Dexamethasone Suppression Test ◽  
Clinical Value ◽  
Suppression Test ◽  
The One ◽  
Steroid Excretion ◽  
Dexamethasone Suppression

ABSTRACT This is an investigation of the practical clinical value of the one mg dexamethasone suppression test of Nugent et al. (1963). The results, evaluated from the decrease in fluorimetrically determined plasma corticosteroids in normal subjects, as well as in cases of exogenous obesity, hirsutism and in Cushing's syndrome, confirm the findings reported in previous studies. Plasma corticosteroid reduction after one mg of dexamethasone in cases of stable diabetes was not significantly different from that observed in control subjects, but in one third of the insulin-treated diabetics only a partial response was observed, indicating a slight hypercorticism in these patients. An insufficient decrease in plasma corticosteroids was observed in certain other conditions (anorexia nervosa, pituitary adenoma, patients receiving contraceptive or anticonvulsive treatment) with no hypercorticism. The physiological significance of these findings is discussed. It is concluded that the test, together with a determination of the basal urinary 17-ketogenic steroid excretion, is suitable as the first diagnostic test in patients in whom Cushing's syndrome is suspected. In cases of insufficient suppression of plasma corticosteroids, further studies, including the suppression test of Liddle (1960), must be carried out.

Quasi-Periodic Control Technique for Minimizing Fuel Consumption During Record Vehicle Competition

2013 ◽  
Vol 60 (2) ◽  
pp. 185-197 ◽  
Author(s):  
Paweł Sulikowski ◽  
Ryszard Maronski
Keyword(s):  
Fuel Consumption ◽  
Optimal Control Theory ◽  
Slope Angle ◽  
Control Technique ◽  
Decision Variables ◽  
Aeronautical Engineering ◽  
The One ◽  
Optimal Driving ◽  
The Given ◽  
Engine Power

The problem of the optimal driving technique during the fuel economy competition is reconsidered. The vehicle is regarded as a particle moving on a trace with a variable slope angle. The fuel consumption is minimized as the vehicle covers the given distance in a given time. It is assumed that the run consists of two recurrent phases: acceleration with a full available engine power and coasting down with the engine turned off. The most fuel-efficient technique for shifting gears during acceleration is found. The decision variables are: the vehicle velocities at which the gears should be shifted, on the one hand, and the vehicle velocities when the engine should be turned on and off, on the other hand. For the data of students’ vehicle representing the Faculty of Power and Aeronautical Engineering it has been found that such driving strategy is more effective in comparison with a constant speed strategy with the engine partly throttled, as well as a strategy resulting from optimal control theory when the engine is still active.

The Green New Deal

2019 ◽  
Author(s):  
Robert C. Hockett
Keyword(s):  
New Deal ◽  
Large Scale ◽  
Public Investment ◽  
Climate Science ◽  
Time Frame ◽  
White Paper ◽  
Good News ◽  
Carbon Neutrality ◽  
The One ◽  
In Virtue Of

This white paper lays out the guiding vision behind the Green New Deal Resolution proposed to the U.S. Congress by Representative Alexandria Ocasio-Cortez and Senator Bill Markey in February of 2019. It explains the senses in which the Green New Deal is 'green' on the one hand, and a new 'New Deal' on the other hand. It also 'makes the case' for a shamelessly ambitious, not a low-ball or slow-walked, Green New Deal agenda. At the core of the paper's argument lies the observation that only a true national mobilization on the scale of those associated with the original New Deal and the Second World War will be up to the task of comprehensively revitalizing the nation's economy, justly growing our middle class, and expeditiously achieving carbon-neutrality within the twelve-year time-frame that climate science tells us we have before reaching an environmental 'tipping point.' But this is actually good news, the paper argues. For, paradoxically, an ambitious Green New Deal also will be the most 'affordable' Green New Deal, in virtue of the enormous productivity, widespread prosperity, and attendant public revenue benefits that large-scale public investment will bring. In effect, the Green New Deal will amount to that very transformative stimulus which the nation has awaited since the crash of 2008 and its debt-deflationary sequel.

A Validated 2D-LC-UV Method for Simultaneous Determination of Imatinib and N-demethylimatinib in Plasma and Its Clinical Application for Therapeutic Drug Monitoring with GIST Patients

2020 ◽  
Vol 17 ◽  
Author(s):  
Houli Li ◽  
Di Zhang ◽  
Xiaoliang Cheng ◽  
Qiaowei Zheng ◽  
Kai Cheng ◽  
...  
Keyword(s):  
Therapeutic Drug Monitoring ◽  
One Dimension ◽  
Therapeutic Drug ◽  
Plasma Samples ◽  
Column Temperature ◽  
Injection Volume ◽  
Target Analytes ◽  
The One ◽  
Middle Column

Background: The trough concentration (Cmin) of Imatinib (IM) is closely related to the treatment outcomes and adverse reactions of patients with gastrointestinal stromal tumors (GIST). However, the drug plasma level has great interand intra-individual variability, and therapeutic drug monitoring (TDM) is highly recommended. Objective: To develop a novel, simple, and economical two-dimensional liquid chromatography method with ultraviolet detector (2D-LC-UV) for simultaneous determination of IM and its major active metabolite, N-demethyl imatinib (NDIM) in human plasma, and then apply the method for TDM of the drug. Method: Sample was processed by simple protein precipitation. Two target analytes were separated on the one-dimension column, captured on the middle column, and then transferred to the two-dimension column for further analysis. The detection was performed at 264 nm. The column temperature was maintained at 40˚C and the injection volume was 500 μL. Totally 32 plasma samples were obtained from patients with GIST who were receiving IM. Method: Sample was processed by simple protein precipitation. Two target analytes were separated on the one-dimension column, captured on the middle column, and then transferred to the two-dimension column for further analysis. The detection was performed at 264 nm. The column temperature was maintained at 40˚C and the injection volume was 500 μL. Totally 32 plasma samples were obtained from patients with GIST who were receiving IM. Conclusion: The novel 2D-LC-UV method is simple, stable, highly automated and independent of specialized technicians, which greatly increases the real-time capability of routine TDM for IM in hospital.

scholarly journals Modeling Population Spatial-Temporal Distribution Using Taxis Origin and Destination Data

2021 ◽  
Vol 13 (7) ◽  
pp. 3727
Author(s):  
Fatema Rahimi ◽  
Abolghasem Sadeghi-Niaraki ◽  
Mostafa Ghodousi ◽  
Soo-Mi Choi
Keyword(s):  
Regression Analysis ◽  
Mean Squared Error ◽  
Population Distribution ◽  
Temporal Distribution ◽  
Coefficient Of Determination ◽  
Temporal Modeling ◽  
Location Data ◽  
Time Period ◽  
Proposed Model

During dangerous circumstances, knowledge about population distribution is essential for urban infrastructure architecture, policy-making, and urban planning with the best Spatial-temporal resolution. The spatial-temporal modeling of the population distribution of the case study was investigated in the present study. In this regard, the number of generated trips and absorbed trips using the taxis pick-up and drop-off location data was calculated first, and the census population was then allocated to each neighborhood. Finally, the Spatial-temporal distribution of the population was calculated using the developed model. In order to evaluate the model, a regression analysis between the census population and the predicted population for the time period between 21:00 to 23:00 was used. Based on the calculation of the number of generated and the absorbed trips, it showed a different spatial distribution for different hours in one day. The spatial pattern of the population distribution during the day was different from the population distribution during the night. The coefficient of determination of the regression analysis for the model (R2) was 0.9998, and the mean squared error was 10.78. The regression analysis showed that the model works well for the nighttime population at the neighborhood level, so the proposed model will be suitable for the day time population.

scholarly journals The Concept of Accuracy Analysis of the Vertical Displacements Gained from the Hydrostatic Levelling Systems’ Measurements

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4842
Author(s):  
Waldemar Kamiński
Keyword(s):  
Accuracy Assessment ◽  
Theoretical Models ◽  
Vertical Displacement ◽  
Serial Connection ◽  
Vertical Displacements ◽  
Comprehensive Determination ◽  
The One ◽  
The Individual ◽  
Reference Sensor

Nowadays, hydrostatic levelling is a widely used method for the vertical displacements’ determinations of objects such as bridges, viaducts, wharfs, tunnels, high buildings, historical buildings, special engineering objects (e.g., synchrotron), sports and entertainment halls. The measurements’ sensors implemented in the hydrostatic levelling systems (HLSs) consist of the reference sensor (RS) and sensors located on the controlled points (CPs). The reference sensor is the one that is placed at the point that (in theoretical assumptions) is not a subject to vertical displacements and the displacements of controlled points are determined according to its height. The hydrostatic levelling rule comes from the Bernoulli’s law. While using the Bernoulli’s principle in hydrostatic levelling, the following components have to be taken into account: atmospheric pressure, force of gravity, density of liquid used in sensors places at CPs. The parameters mentioned above are determined with some mean errors that influence on the accuracy assessment of vertical displacements. In the subject’s literature, there are some works describing the individual accuracy analyses of the components mentioned above. In this paper, the author proposes the concept of comprehensive determination of mean error of vertical displacement (of each CPs), calculated from the mean errors’ values of components dedicated for specific HLS. The formulas of covariances’ matrix were derived and they enable to make the accuracy assessment of the calculations’ results. The author also presented the subject of modelling of vertical displacements’ gained values. The dependences, enabling to conduct the statistic tests of received model’s parameters, were implemented. The conducted tests make it possible to verify the correctness of used theoretical models of the examined object treated as the rigid body. The practical analyses were conducted for two simulated variants of sensors’ connections in HLS. Variant no. I is the sensors’ serial connection. Variant no. II relies on the connection of each CPs with the reference sensor. The calculations’ results show that more detailed value estimations of the vertical displacements can be obtained using variant no. II.

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